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VIIRS
SNPP
J1
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C2
Year
Date Orbit Phase Angle Maneuver Time (UTC) VIIRS SDR/EDR Team Blog Notice Event Timeline Geolocation error Evaluation Notes
2025-06-06 10:47:26 - 10:52:29z SNPP VIIRS Lunar Calibration (No-Roll) Maneuver Timeline: (UTC)
  • Center time (no Roll): 10:49:57 UTC
  • Sector rotation/Fixed high gain (5 min): 10:47:26 - 10:52:29
 10:42 - 10:48 (inclusive)
2025-05-07 23:27:44 - 23:40:45z SNPP VIIRS Lunar Roll Maneuver (LRM) Maneuver Timeline: (UTC)
  • Center time/Roll angle: 23:33:14 UTC to -3.0 deg (predicted -3.16 deg)
  • Sector rotation/Fixed gain (13 min): 23:27:44 - 23:40:45
  • Slew maneuver (12 min): 23:28:14 - 23:40:14
 Impacted Granules: 23:24 - 23:36 (inclusive)
2025-04-08 07:06:28 - 07:13:29z SNPP VIIRS Lunar Roll Maneuver (LRM) Maneuver Timeline: (UTC)
  • Center time/Roll angle: 07:09:58 UTC to -1.5 deg
  • Sector rotation/Fixed gain (7 min): 07:06:28 - 07:13:29
  • Slew maneuver (6 min): 07:06:58 - 07:12:58
 Impacted Granules: 07:06, 07:12
2025-03-26 17:01:00z - 19:08:04z SNPP VIIRS Drag Make Up Maneuver (DMU) 043 Maneuver Timeline: (UTC)
  • 17:01:00Z - 19:08:04z CERES in Contam-Safe mode, science data will not be available
  • 17:11:00Z - 17:38:06z OMPS in Decon mode, Science data will not be available
  • 17:16:00Z - 17:39:05z HRD will be off, data for direct broadcast users will not be available
  • 17:21:00Z - 17:34:04z NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
 Impacted Granules: 17:18 - 17:30 (inclusive)
2025-03-09 08:02:37 - 08:07:40z SNPP VIIRS Lunar Calibration (No-Roll) Maneuver Timeline: (UTC)
  • Center time (no Roll): 08:05:08 UTC
  • Sector rotation/Fixed high gain (5 min): 08:02:37 to 08:07:40
 08:00, 08:06 SNPP VIIRS LRC was performed without sector rotation. L1 geolocation and L1b generated during this period were impacted.
2025-02-08 00:17:40z - 00:22:43z SNPP VIIRS Lunar Calibration (No-Roll) Maneuver Timeline: (UTC)
  • Center time (no Roll): 00:20:11 UTC
  • Sector rotation/Fixed high gain (5 min): 00:17:40 to 00:22:43
2025-01-09 21:38:28Z - 21:51:29z SNPP VIIRS Lunar Roll Maneuver (LRM) Maneuver Timeline: (UTC)
  • Center time/Roll angle: 21:43:58 UTC to -3.0 deg (predicted -3.24 deg)
  • Sector rotation/Fixed gain (13 min): 21:38:28 - 21:51:29
  • Slew maneuver (12 min): 21:38:58 - 21:50:58
 Impacted Granules: 21:42
2024-12-11 12:22:19Z - 12:35:20z SNPP VIIRS Lunar Roll Maneuver (LRM) Maneuver Timeline: (UTC)
  • Center time/Roll angle: 12:27:49 UTC to -9.5 deg (predicted -9.67 deg)
  • Sector rotation/Fixed gain (13 min): 12:22:19 - 12:35:20
  • Slew maneuver (12 min): 12:22:49 - 12:34:49
Impacted Granules: 12:24 - 12:36 (inclusive)
2024-11-20 17:57:00Zz - 20:04:04z SNPP VIIRS Drag Make Up Maneuver (DMU) 042 Maneuver Timeline: (UTC)
  • 17:57:00Z - 20:04:04Z CERES in Contam-Safe mode, science data will not be available
  • 18:07:00Z - 18:34:06Z OMPS in Decon mode, Science data will not be available
  • 18:12:00Z - 18:35:05Z HRD will be off, data for direct broadcast users will not be available
  • 18:17:00Z - 18:25:04Z S-NPP in Control Frame 2 (DMU) (Delta-V Control Frame)
  • 18:17:00Z - 18:30:04Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
 Impacted Granules: 18:12 to 18:24 (inclusive)
2024-11-12 03:11:27z - 03:24:28z SNPP VIIRS Lunar Roll Maneuver (LRM) Maneuver Timeline: (UTC)
  • Center time/Roll angle: 03:16:57 UTC to -4.5 deg
  • Sector rotation/Fixed gain (13 min): 03:11:27 - 03:24:28
  • Slew maneuver (12 min): 03:11:57 - 03:23:57
 Impacted Granules: 03:12 - 03:18 (inclusive)
2024-10-09 16:07:00z - 18:14:04z SNPP VIIRS Drag Make Up Maneuver (DMU) 041 Maneuver Timeline: (UTC)
  • 16:07:00Z - 18:14:04Z CERES in Contam-Safe mode, science data will not be available
  • 16:17:00Z - 16:44:06Z OMPS in Decon mode, Science data will not be available
  • 16:22:00Z - 16:45:05Z HRD will be off, data for direct broadcast users will not be available
  • 16:27:00Z - 16:35:04Z S-NPP in Control Frame 2 (DMU) (Delta-V Control Frame)
  • 16:27:00Z - 16:40:04Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
 Impacted Granules: 16:24 - 16:36z (inclusive)
2024-06-20 18:05:04 - 18:12:04Z SNPP VIIRS Drag Make Up Maneuver (DMU) 040 Maneuver Timeline: (UTC)
  • Revolution 65538
  • Slew Start: 17:59:00
  • Delta-V Burn Start: 18:05:00
  • Orbit Epoch: 18:05:02
  • Delta-V Burn End: 18:05:04
  • Returned to MPM: 18:12:04
  • Non-MPM Duration: 13:04
 Impacted Granules: 17:54 - 18:18z (inclusive)
2024-05-19 00:09:42 - 00:16:43Z VIIRS Lunar Roll Calibration Maneuver (LRM) Timeline: (UTC)
  • Center time/Roll angle: 00:13:12 UTC to -2.34 deg
  • Sector rotation/Fixed gain (7 min): 00:09:42 - 00:16:43
  • Slew maneuver (6 min): 00:10:12 - 00:16:12
2024-04-19 06:06:48Z - 06:13:49Z VIIRS Lunar Roll Calibration Maneuver (LRM) Timeline: (UTC)
  • Center time/Roll angle: 06:10:18 UTC to -1.88 deg
  • Sector rotation/Fixed gain (7 min): 06:06:48 - 06:13:49
  • Slew maneuver (6 min): 06:07:18 - 06:13:18
 06:12
2024-03-06 17:04:00Z - 19:19:11Z S-NPP Inclination Adjustment Maneuver (IAM) Timeline: (UTC)
  • 17:04:00Z - 19:19:11Z CERES in Contam-Safe mode, science data will not be available
  • 17:14:00Z - 17:55:13Z OMPS in Decon mode, Science data will not be available
  • 17:19:00Z - 17:56:12Z HRD will be off, data for direct broadcast users will be unavailable
  • 17:24:00Z - 17:38:11Z S-NPP in Control Frame 2 (IAM) (Delta-V Control Frame)
  • 17:24:00Z - 17:51:11Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
 17:24 to 17:48 (inclusive)
2024-01-21 07:05:41Z - 07:10:44Z VIIRS Lunar Calibration No roll Timeline: (UTC)
  • Center time (no Roll): 07:08:12 UTC
  • Sector rotation/Fixed high gain (5 min): 07:05:41 to 07:10:44
2023-12-23 09:37:30- 09:42:33 VIIRS Lunar Calibration (No Roll) Maneuver Timeline: (UTC)
  • Center time (no Roll): 09:40:01 UTC
  • Sector rotation/Fixed high gain (5 min): 09:37:30 to 09:42:33
2023-12-20 17:56:00 - 20:03:04 SNPP Drag Make-up Maneuver (DMU) 039 Timeline: (UTC)
  • 17:56:00Z - 20:03:04Z - CERES in Contam-Safe mode, science data will not be available
  • 18:06:00Z - 18:33:06Z - OMPS in Decon mode, Science data will not be available
  • 18:11:00Z - 18:34:05Z - HRD will be off, data for direct broadcast users will be unavailable
  • 18:16:00Z - 18:24:04Z - NPP in Control Frame 2 (DMU) (Delta-V Control Frame)
  • 18:16:00Z - 20:03:04Z - S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
 Corrupt L1B geolocation: 18:12 - 18:24 (inclusive)
2023-11-23 08:51:24 - 09:53:23 VIIRS Lunar Calibration w/ Roll Maneuver Timeline: (UTC)
  • Center time/Roll angle: 09:16:24 UTC to -6.46 deg
  • Sector rotation/Fixed gain (13 min): 09:10:54 - 09:23:55
  • Slew maneuver (12 min): 09:11:24 - 09:23:24
 Failed Granules: 09:12 - 09:18 inclusive
2023-10-11 16:33:00 - 18:40:04 SNPP Drag Make-up Maneuver (DMU) 038 Timeline: (UTC)
  • 16:33:00Z - 18:40:04Z CERES in Contam-Safe mode, science data will not be available
  • 16:43:00Z - 17:10:06Z OMPS in Decon mode, Science data will not be available
  • 16:48:00Z - 17:11:05Z - HRD will be off, data for direct broadcast users will be unavailable
  • 16:53:00Z - 17:01:04Z NPP in Control Frame 2 (DMU) (Delta-V Control Frame)
  • 16:53:00Z - 17:06:04Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
 Corrupt L1B geolocation: 16:48 - 17:00 (inclusive)
2023-06-28 20:55:11 - 21:00:14 VIIRS Lunar Calibration (No Roll) Maneuver Timeline: (UTC)
  • Center time (no Roll): 20:57:42 UTC
  • Sector rotation/Fixed high gain (5 min): 20:55:11 to 21:00:14
2023-06-21 17:03:00Z - 17:16:04z VIIRS S-NPP Drag Makeup Maneuver (DMU) 037 Timeline: (UTC)
  • 16:43:00Z -18:50:04Z CERES in Contam-Safe mode, science data will not be available
  • 16:53:00Z - 17:20:06Z OMPS in Decon mode, Science data will not be available
  • 16:58:00Z - 17:21:05Z - HRD will be off, data for direct broadcast users will be unavailable
  • 17:03:00Z - 17:11:04Z NPP in Control Frame 2 (DMU) (Delta-V Control Frame)
  • 17:03:00Z - 17:16:04Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
 Corrupt L1B geolocation: 17:00 - 17:18 (inclusive)
2023-05-31 00:51:43 - 00:58:44 VIIRS Lunar Calibration w/ Roll Maneuver Timeline: (UTC)
  • Center time/Roll angle: 00:55:13 UTC to -1.25 deg
  • Sector rotation/Fixed gain (7 min): 00:51:43 - 00:58:44
  • Slew maneuver (6 min): 00:52:13 - 00:58:13
2023-05-08 08:44:00Z - 20:16:04Z S-NPP Risk Mitigation Maneuver (RMM) Timeline: (UTC)
  • On May 8, 2023 at 09:10:00Z, S-NPP will perform a 0.8 second propulsive Risk Mitigation Maneuver (RMM) to provide collision avoidance
 09:00 to 09:12 (inclusive)
2023-05-01 08:28:48 - 08:41:49 VIIRS Lunar Calibration w/ Roll Maneuver Timeline: (UTC)
  • Center time/Roll angle: 08:34:18 UTC to -3.13 deg
  • Sector rotation/Fixed gain (13 min): 08:28:48 - 08:41:49
  • Slew maneuver (12 min): 08:29:18 - 08:41:18
 Failed Granules: 08:30
2023-04-13 16:15:49Z - 18:33:51Z VIIRS S-NPP Inclination Adjustment Maneuver (IAM) Timeline: (UTC)
  • 16:15:49Z - 18:33:51Z CERES in Contam-Safe mode, science data will not be available
  • 16:25:49Z - 17:09:53Z OMPS in Decon mode, Science data will not be available
  • 16:30:49Z - 17:10:52Z HRD will be off, data for direct broadcast users will be unavailable.
  • 16:35:49Z - 16:52:51Z Slew maneuver to -91.3 deg Yaw
  • 16:35:49Z - 17:05:51Z Slew back to Nadir Attitude - collected data during that time period may be impacted and not disseminated.
Corrupt L1B geolocation: 16:30 - 17:06 (inclusive)
2023-04-01 12:49:22 - 12:54:25Z VIIRS Lunar Calibration (No Roll) Maneuver Timeline: (UTC)
  • Center time (no Roll): 12:51:53 UTC
  • Sector rotation/Fixed high gain (5 min): 12:49:22 - 12:54:25Z
2023-03-02 00:58:56 - 01:03:59Z VIIRS Lunar Calibration No roll Timeline: (UTC)
  • Center time (no Roll): 10:25:33 UTC
  • Sector rotation/Fixed high gain (5 min): 10:23:02 to 10:28:05
2023-03-01 16:34:00Z - 18:41:04z VIIRS S-NPP Drag Makeup Maneuver (DMU) 036 Timeline: (UTC)
  • 16:34:00Z - 18:41:04z CERES in Contam-Safe mode, science data will not be available
  • 16:44:00Z - 17:11:06z OMPS in Decon mode, Science data will not be available
  • 16:49:00Z - 17:12:05z HRD will be off, data for direct broadcast users will be unavailable.
  • 16:54:00Z - 17:02:04z S-NPP in Control Frame 2 (DMU) (Delta-V Control Frame)
  • 16:54:00Z - 17:07:04z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated.
 Corrupt L1B geolocation: 16:54 - 17:06 (inclusive)
2023-02-01 00:58:56 - 01:03:59Z VIIRS Lunar Calibration No roll (Orbit 58362, #2 of 2) Timeline: (UTC)
  • Center time (no Roll): 01:01:27 UTC
  • Sector rotation/Fixed high gain (5 min): 00:58:56 to 01:03:59
2023-01-31 23:17:06Z - 23:22:09Z VIIRS Lunar Calibration No roll (Orbit 58361, #1 of 2) Timeline: (UTC)
  • Center time (no Roll): 23:19:37 UTC
  • Sector rotation/Fixed high gain (5 min): 23:17:06 to 23:22:09
2023-01-02 05:06:10Z - 06:08:10Z VIIRS Lunar Calibration w/ Roll Maneuver Timeline: (UTC)
  • Center time/Roll angle: 05:31:10 UTC to -7.39 deg
  • Sector rotation/Fixed gain (13 min): 05:25:40 - 05:38:41
  • Slew maneuver (12 min): 05:26:10 - 05:38:10
 Failed Granules: 05:30
2022-12-03 16:51:09 - 17:03:09Z VIIRS Lunar Calibration (roll maneuver) Timeline: (UTC)
  • Center time/Roll angle: 16:56:09 UTC to -7.97 deg
  • Sector rotation/Fixed gain (13 min): 16:50:39 - 17:03:40
  • Slew maneuver (12 min): 16:51:09 - 17:03:09
 Failed Granule: 16:54
2022-12-02 15:56:00Z - 18:03:04Z Risk Mitigation Maneuver (RMM) Timeline: (UTC)
  • 16:22:00Z, S-NPP performed a 3.0 second propulsive Risk Mitigation Maneuver (RMM) to provide collision avoidance.
 (16:12 to 16:30z inclusive) Geolocation team reviewed.
2022-11-04 05:57:06 - 06:02:09 VIIRS Lunar Calibration (no roll maneuver) Timeline: (UTC)
  • Center time (no Roll): 05:59:37 UTC
  • Sector rotation/Fixed gain (5 min): 05:57:06 - 06:02:09
2022-06-10 15:22:21 - 15:27:24 VIIRS Lunar Calibration (no roll maneuver) Timeline: (UTC)
  • Center time (no Roll): 15:24:52 UTC
  • Sector rotation/Fixed gain (5 min): 15:22:21 - 15:27:24
2022-06-01 17:00:00Z - 19:07:04Z VIIRS S-NPP Drag Makeup Maneuver (DMU) Timeline: (UTC)
  • 17:00:00Z - 19:07:04Z CERES in Contam-Safe mode, science data will not be available
  • 17:10:00Z - 17:38:05Z OMPS in Decon mode, Science data will not be available
  • 17:15:00Z - 17:38:05Z HRD will be off, data for direct broadcast users will be unavailable.
  • 17:20:00Z - 17:26:03Z S-NPP in Control Frame 2 (DMU) (Delta-V Control Frame)
  • 17:20:00Z - 17:33:04Z S-NPP pointing off-nadir, collected data during that time period
  • may be impacted and not disseminated.
 Corrupt L1B geolocation: 17:18 - 17:30 (inclusive)
2022-05-12 05:44:30 - 05:57:31Z VIIRS Lunar Calibration (roll maneuver) Timeline: (UTC)
  • Center time/Roll angle: 05:50:00 UTC to -2.89 deg
  • Sector rotation/Fixed gain (13 min): 05:44:30 - 05:57:31
  • Slew maneuver (12 min): 05:45:00 - 05:57:00
2022-04-12 16:51:20 - 16:56:23Z VIIRS Lunar Calibration (no roll maneuver) Timeline: (UTC)
  • Center time (no Roll): 16:53:51 UTC
  • Sector rotation/Fixed gain (5 min): 16:51:20 - 16:56:23
2022-03-13 14:24:23 - 14:29:26Z VIIRS Lunar Calibration (no roll maneuver) Timeline: (UTC)
  • Center time (no Roll): 14:26:54 UTC
  • Sector rotation/Fixed gain (5 min): 14:24:23 - 14:29:26
2022-02-12 01:36:03 - 01:41:07Z VIIRS Lunar Calibration (no roll maneuver) Timeline: (UTC)
  • 01:36:03 - VIIRS DC Off
  • 01:36:04 - VIIRS Encoder Offset Shift to 26790
  • 01:36:05 - VIIRS Gain set to Fixed High Gain
  • 01:38:35 - Center of dwell
  • 01:41:04 - VIIRS Encoder Offset set back to 0
  • 01:41:05 - VIIRS DC On
  • 01:41:07 - VIIRS Gain set to Auto Gain
2022-02-02 17:21:00 - 19:28:04Z DMU #34 Timeline: (UTC)
  • 17:21:00Z - 19:28:04Z CERES in Contam-Safe mode, science data will not be available
  • 17:33:00Z - 17:58:06Z OMPS in Decon mode, Science data will not be available
  • 17:36:00Z - 17:59:05Z - HRD will be off, data for direct broadcast users will be unavailable
  • 17:41:00Z - 17:47:02Z NPP in Control Frame 2 (DMU) (Delta-V Control Frame)
  • 17:41:00Z- 17:54:04Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
 (17:36-17:54z inclusive) Geolocation team reviewed.
2022-01-13 04:21:00 - 04:33:00Z VIIRS Lunar Calibration w/ Roll Maneuver Timeline: (UTC)
  • Center time/Roll angle: 04:26:00 UTC to -5.21 deg
  • Sector rotation/Fixed gain (13 min): 04:20:30 - 04:33:31
  • Slew maneuver (12 min): 04:21:00 - 04:33:00
 Failed Granules: 04:24
2021-12-14 08:58:59 - 09:10:59Z VIIRS Lunar Calibration w/ Roll Maneuver Timeline: (UTC)
  • Center time/Roll angle: 09:03:59 UTC to -8.86 deg
  • Sector rotation/Fixed gain (13 min): 08:58:29 - 09:11:30
  • Slew maneuver (12 min): 08:58:59 - 09:10:59
 Failed Granules: 09:00
2021-11-18 17:31:27z - 19:48:03z VIIRS S-NPP Inclination Adjustment Maneuver (IAM) Timeline: (UTC)
  • 17:31:27z - 19:48:03Z CERES in Contam-Safe mode, science data will not be available
  • 17:41:27z - 18:24:05Z OMPS in Decon mode, Science data will not be available
  • 17:46:27z - 18:25:03z HRD will be off, data for direct broadcast users will be unavailable.
  • 17:51:27z - 18:07:03z S-NPP in Control Frame 3 (IAM) (Delta-V Control Frame)
  • 17:51:27z - 18:20:03z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
 Corrupt L1B geolocation: 17:48 - 19:18 (inclusive)
2021-11-14 18:42:38 - 18:48:38Z VIIRS Lunar Calibration w/ Roll Maneuver Timeline: (UTC)
  • Center time/Roll angle: 18:45:38 UTC to -1.79 deg
  • Sector rotation/Fixed gain (7 min): 18:42:07 - 18:49:08
  • Slew maneuver (6 min): 18:42:38 - 18:48:38
2021-10-14 02:11:00Z - 04:18:04Z S-NPP Risk Mitigation Maneuver (RMM) Timeline: (UTC)
  • 02:37:00Z, S-NPP performed a 1.0 second propulsive Risk Mitigation Maneuver (RMM) to provide collision avoidance.
  • S-NPP will not slew for this maneuver.
 Corrupt L1B geolocation: 02:36
2021-06-20 21:25:28 - 21:30:31Z VIIRS Lunar Calibration (no roll maneuver) Timeline: (UTC)
  • 21:25:28 - VIIRS DC Off
  • 21:25:29 - VIIRS Encoder Offset Shift to 26790
  • 21:25:30 - VIIRS Gain set to Fixed High Gain
  • 21:28:00 - Center of dwell
  • 21:30:29 - VIIRS Encoder Offset set back to 0
  • 21:30:30 - VIIRS DC On
  • 21:30:32 - VIIRS Gain set to Auto Gain
2021-06-12 00:44:00Z- 02:51:04Z S-NPP Risk Mitigation Maneuver (RMM) Timeline: (UTC)
  • 01:04:00z - 01:17:04z - S-NPP pointing off-nadir
 Corrupt L1B geolocation: 01:00 - 01:12 (inclusive)
2021-05-22 18:36:45 - 18:43:46Z VIIRS Lunar Calibration w/ Roll Maneuver Timeline: (UTC)
  • 18:36:45 - VIIRS DC Restore Turns Off (Data Cal Flag)
  • 18:36:46 - VIIRS Encoder Offset Shift to 26790
  • 18:37:16 - Start of S/C Slew Roll (-2.18 deg roll, 60 seconds duration)
  • 18:38:16 - Finish Slew Maneuver, Start 4-minute Dwell
  • 18:40:16 - Center of Dwell at Targeted Roll Angle
  • 18:42:16 - Start Return Slew Mnvr to Nadir Attitude (300 secs.)
  • 18:43:16 - Return to Nominal Mission Pointing
  • 18:43:46 - VIIRS DC Restore Turns On (Data Cal Flag)
2021-04-29 16:40:00 - 16:53:04:00Z DMU #33 Timeline: (UTC)
  • 16:40:00 - Slew Start Maneuver
  • 16:42:00 - Delta-V Burn Start (1 sec)
  • 16:48:04 - Return to Mission Point Mode
  • 16:53:04 - Finish Return To Nadir Slew
 Corrupt L1B geolocation: 16:36-16:48 (inclusive)
2021-04-23 09:02:32 - 09:09:33Z lunar calibration data collect (no roll maneuver) Timeline: (UTC)
  • 09:02:32 - VIIRS DC Restore Turns Off (Data Cal Flag)
  • 09:02:33 - VIIRS Encoder Offset Shift to 26790
  • 09:03:03 - Start of S/C Slew Roll
  • 09:04:03 - Finish Slew Maneuver, Start 4-minute Dwell
  • 09:06:03 - Center of Dwell at Targeted Roll Angle
  • 09:08:03 - Start Return Slew Mnvr to Nadir Attitude (300 secs.)
  • 09:09:03 - Return to Nominal Mission Pointing
  • 09:09:33 - VIIRS DC Restore Turns On (Data Cal Flag)
2021-03-24 21:49:51 - 21:54:55Z lunar calibration data collect (no roll maneuver) Timeline: (UTC)
  • 21:49:51 - VIIRS DC Off
  • 21:49:52 - VIIRS Encoder Offset Shift to 26790
  • 21:49:53 - VIIRS Gain set to Fixed High Gain
  • 21:52:23 - Center of dwell
  • 21:54:52 - VIIRS Encoder Offset set back to 0
  • 21:54:53 - VIIRS DC On
  • 21:54:55 - VIIRS Gain set to Auto Gain
2021-02-23 03:56:20Z - 04:01:24Z VIIRS Lunar Calibration (No roll maneuver) Timeline: (UTC)
  • 03:56:20 - VIIRS DC Off
  • 03:56:21 - VIIRS Encoder Offset Shift to 26790
  • 03:56:22 - VIIRS Gain set to Fixed High Gain
  • 03:58:52 - Center of dwell
  • 04:01:21 - VIIRS Encoder Offset set back to 0
  • 04:01:22 - VIIRS DC On
  • 04:01:24 - VIIRS Gain set to Auto Gain
2021-01-24 08:20:18Z - 08:33:19Z VIIRS Lunar Calibration w/ Roll Maneuver Timeline: (UTC)
  • 08:20:18 - VIIRS DC Restore Turns Off (Data Cal Flag)
  • 08:20:19 - VIIRS Encoder Offset Shift to 26790
  • 08:20:49 - Start of S/C Slew Roll
  • 08:20:18 - Finish Slew Maneuver, Start 4-minute Dwell
  • 08:25:49 - Center of Dwell at Targeted Roll Angle
  • 08:27:49 - Start Return Slew Mnvr to Nadir Attitude (300 secs.)
  • 08:32:49 - Return to Nominal Mission Pointing
  • 08:33:19 - VIIRS DC Restore Turns On (Data Cal Flag)
 Failed Granules: 08:24
2020-12-25 11:12:46Z - 11:25:47Z VIIRS Lunar Calibration w/ Roll Maneuver Timeline: (UTC)
  • 11:12:46 - VIIRS DC Restore Turns Off (Data Cal Flag)
  • 11:12:47 - VIIRS Encoder Offset Shift to 26790
  • 11:13:17 - Start of S/C Slew Roll
  • 11:16:17 - Finish Slew Maneuver, Start 4-minute Dwell
  • 11:18:17 - Center of Dwell at Targeted Roll Angle
  • 11:20:17 - Start Return Slew Mnvr to Nadir Attitude (300 secs.)
  • 11:25:17 - Return to Nominal Mission Pointing
  • 11:25:47 - VIIRS DC Restore Turns On (Data Cal Flag)
 Failed Granules: 11:18
2020-12-10 16:54:00 Z - 17:07:04Z DMU # 32 Timeline: (UTC)
  • 16:54:00 - Slew Start
  • 17:00:00 - Delta-V Burn Start (1 sec)
  • 17:07:04 - Return to Mission Point Mode
 Corrupt L1B geolocation:: 16:54 - 17:06 (inclusive)
2020-11-25 15:50:43Z - 16:03:44Z VIIRS Lunar Calibration w/ Roll Maneuver Timeline: (UTC)
  • 15:50:43 - VIIRS DC Restore Turns Off (Data Cal Flag)
  • 15:50:44 - VIIRS Encoder Offset Shift to 26790
  • 15:51:14 - Start of S/C Slew Roll
  • 15:54:14 - Finish Slew Maneuver, Start 4-minute Dwell
  • 15:56:14 - Center of Dwell at Targeted Roll Angle
  • 15:58:14 - Start Return Slew Mnvr to Nadir Attitude (300 secs.)
  • 16:03:14 - Return to Nominal Mission Pointing
  • 16:03:44 - VIIRS DC Restore Turns On (Data Cal Flag)
 Failed Granules: 15:54
2020-09-24 17:09Z - 19:25Z VIIRS S-NPP Inclination Adjustment Maneuver (IAM) Timeline: (UTC)
  • 1709Z - 1925Z CERES in Contam-Safe mode, science data will not be available
  • 1719Z - 1801Z OMPS in Decon mode, Science data will not be available
  • 1724Z - 1802Z HRD will be off, data for direct broadcast users will be unavailable
  • 1729Z - 1757Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated. ATMS data may be perturbed due to maneuver-induced spacecraft vibrations and its effects on the scan drive.
 Corrupt L1B geolocation: 17:30 - 18:54 (inclusive)
2020-06-24 16:36:00Z - 16:49:04Z VIIRS S-NPP Drag Makeup Maneuver (DMU) Timeline: (UTC)
  • 16:16:00Z - 18:23:04Z CERES in Contam-Safe mode, science data will not be available
  • 16:26:00Z - 16:53:06Z OMPS in Decon mode, Science data will not be available
  • 16:31:00Z - 16:54:05Z HRD will be off, data for direct broadcast users will be unavailable
  • 16:36:00Z - 16:49:04Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
 Corrupt L1B geolocation: 16:36 - 16:48 (inclusive)
2020-06-02 00:42:10Z - 00:47:14Z S-NPP VIIRS Lunar Calibration (no Roll Maneuver) Timeline: (UTC)
  • 00:42:10 - VIIRS DC Off
  • 00:42:11 - VIIRS Encoder Offset Shift to 26790
  • 00:42:12 - VIIRS Gain set to Fixed High Gain
  • 00:44:42 - Center of dwell
  • 00:47:11 - VIIRS Encoder Offset set back to 0
  • 00:47:12 - VIIRS DC On
  • 00:47:14 - VIIRS Gain set to Auto Gain
2020-05-03 18:30:49Z - 18:37:50 Z S-NPP VIIRS Lunar Calibration (no Roll Maneuver) Timeline: (UTC)
  • 18:30:49 - VIIRS DC Restore Turns Off (Data Cal Flag)
  • 18:30:50 - VIIRS Encoder Offset Shift to 26790
  • 18:31:20 - Start of S/C Slew Roll
  • 18:32:20 - Finish Slew Maneuver, Start 4-minute Dwell
  • 18:34:20 - Center of Dwell at Targeted Roll Angle
  • 18:36:20 - Start Return Slew Maneuver to Nadir Attitude (300 secs.)
  • 18:37:20 - Return to Nominal Mission Pointing
  • 18:37:50 - VIIRS DC Restore Turns On (Data Cal Flag)
  • 18:11:20 - CERES commanded to Contam Safe
  • 19:07:20 - CERES commanded to CrossTrack
2020-04-04 10:41:50 Z - 10:46:54 Z S-NPP VIIRS Lunar Calibration (no Roll Maneuver) Timeline: (UTC)
  • TBD - VIIRS DC Off
  • TBD - VIIRS Encoder Offset Shift to 26790
  • TBD - VIIRS Gain set to Fixed High Gain
  • TBD - Center of dwell
  • TBD - VIIRS Encoder Offset set back to 0
  • TBD - VIIRS DC On
  • TBD - VIIRS Gain set to Auto Gain
2020-03-05 21:49:51 Z - 21:49:55 Z S-NPP VIIRS Lunar Calibration (no Roll Maneuver) Timeline: (UTC)
  • 21:49:51 - VIIRS DC Off
  • 21:49:52 - VIIRS Encoder Offset Shift to 26790
  • 21:49:53 - VIIRS Gain set to Fixed High Gain
  • 21:52:23 - Center of dwell
  • 21:54:52 - VIIRS Encoder Offset set back to 0
  • 21:54:53 - VIIRS DC On
  • 21:54:55 - VIIRS Gain set to Auto Gain
2020-02-05 09:00:47 Z - 09:07:48 Z S-NPP VIIRS Lunar Calibration Roll Maneuver Timeline: (UTC)
  • 08:41:17 Z - 09:37:17 Z CERES will be in Contam-Safe and Standby, science data will not be available
  • 08:56:17 Z - 09:12:17 Z HRD will be off, data for direct broadcast users will be unavailable
  • 09:00:47 Z - 09:07:48 Z VIIRS encoder offset and gain will be set for Moon observation
  • 09:01:17 Z - 09:07:17 Z S-NPP will be pointing off-nadir, collected data may be impacted and not disseminated
2020-01-22 15:50:00 to 17:57:04z VIIRS S-NPP Drag Makeup Maneuver (DMU) #30 Timeline: (UTC)
  • 15:50:00z - 17:57:04z CERES in Contam-Safe mode, science data will not be available
  • 16:00:00Z – 16:27:06Z OMPS in Decon mode, Science data will not be available
  • 16:05:00Z – 16:28:05Z HRD will be off, data for direct broadcast users will be unavailable
  • 16:10:00Z – 16:23:04Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
 Corrupt L1B geolocation: 16:06 - 16:18 (inclusive)
2020-01-06 15:11:16 to 15:53:46z VIIRS Lunar Calibration (with Roll Maneuver) Timeline: (UTC)
  • 15:11:16 - VIIRS Encoder Offset Shift to 26790
  • 15:11:46 - Start of Slew Maneuver to -6.45 deg roll angle (180 secs.)
  • 15:14:46 - Finish Slew Maneuver, Start 4-minute Dwell
  • 15:16:46 - Center of Dwell at Targeted Roll Angle
  • 15:18:46 - Start Return Slew Maneuver to Nadir (300 secs.)
  • 15:23:46 - Return to Nominal Mission Pointing
  • 15:24:15 - VIIRS Encoder Offset Set Back to 0
  • 14:51:46 - CERES commanded to Contam Safe
  • 15:53:46 - CERES commanded to CrossTrack
Failed Granules: 15:12, 15:18
2019-12-07 19:48:28 to 20:01:29z VIIRS Lunar Calibration (with Roll Maneuver) Timeline: (UTC)
  • 19:48:28 - VIIRS encoder offset shift to 26790,
  • 19:48:58 - Start of S/C slew roll to -6.315 degrees,
  • 19:51:58 - Finish slew maneuver, Start 4-min dwell,
  • 19:53:58 - Center of dwell,
  • 19:55:58 - Start return slew maneuver,
  • 20:00:58 - Return to nominal mission pointing,
  • 20:01:27 - VIIRS encoder offset set back to 0
  • 20:01:29 - VIIRS Gain set to Auto Gain
 Failed Granules: 19:54
2019-11-07 22:44:35 to 22:49:39z VIIRS Lunar Non-Roll Calibration Timeline: (UTC)
  • 22:44:35 - VIIRS DC Off
  • 22:44:36 - VIIRS Encoder Offset Shift to 26790
  • 22:44:37 - VIIRS Gain set to Fixed High Gain
  • 22:47:07 - Center of Dwell
  • 22:49:36 - VIIRS Encoder Offset set back to 0
  • 22:49:37 - VIIRS DC On
  • 22:49:39 - VIIRS Gain set back to Auto Gain
2019-09-26 16:13:45 to 16:51:50z VIIRS Inclination Adjust Maneuver Timeline: (UTC)
  • Start Slew out to Maneuver - 16:13:45
  • Delta-V Burn Start : 16:26:45
  • Orbit Epoch: 16:27:47
  • Delta-V Burn End : 16:28:50
  • Return to Mission Point Mode: 16:41:50
  • Reset GPS Estimation 16:43:50
  • CERES Contam Safe: 15:53:45 - 18:09:50
  • OMPS Decon: 16:03:45 - 16:45:52
 Corrupt L1B geolocation: 16:12 - 16:48 (inclusive)
2019-06-13 03:23:49 to 03:28:53z VIIRS Lunar Observation and Sector Rotation (no maneuver) Timeline: (UTC)
  • orbit 39509
  • The lunar observation is centered at 03:26:21z.
2019-05-14 21:10:55 - 21:23:54 VIIRS Lunar Cal (with Roll Maneuver) Timeline: (UTC)
  • 21:10:55 - VIIRS encoder offset shift to 26790
  • 21:11:25 - Start of S/C slew roll to -3.1 degrees
  • 21:14:25 - Finish slew maneuver, start 4-minute dwell
  • 21:16:25 - Center of dwell
  • 21:18:25 - Start return slew maneuver
  • 21:23:25 - Return to nadir Attitude
  • 21:23:54 - VIIRS encoder offset set back to 0
  • 20:51:25 - CERES commanded to Contam Safe
  • 21:53:25 - CERES commanded to CrossTrack
 Failed Granules: 21:12, 21:18
2019-04-15 16:46:07 - 16:51:11 VIIRS Lunar Cal (without a roll) Timeline: (UTC)
  • 16:46:07: VIIRS DC Off
  • 16:46:08: VIIRS Encoder Offset Shift to 26790
  • 16:46:09: VIIRS Gain Set to Fixed High Gain
  • 16:48:39: Center of Dwell
  • 16:51:08: VIIRS Encoder Offset to 0
  • 16:51:09: VIIRS DC Off
  • 16:51:11: VIIRS Gain Set to Auto Gain
2019-04-10 15:40:00 - 17:47:04 DMU Maneuver Timeline: (UTC)
  • CERES ContamSafe: 15:40:00 - 17:47:04
  • OMPS Decon: 15:50:00 – 16:17:06
  • 16:00:00: Slew Start
  • 16:06:00: Delta-V Burn Start
  • 16:06:01: Delta-V Burn End
  • 16:13:04: Returned to Mission Point Mode
 Corrupt L1B geolocation: 16:00 - 16:12 (inclusive)
2019-03-17 08:58:29 - 09:03:32 VIIRS Lunar Calibration (Not Maneuver) Instrument(s) Affected:VIIRS
Timeline: (UTC)
  • 08:58:29 - VIIRS Encoder Offset Shift to 26790
  • 08:58:30 - VIIRS Gain set to VIIRS High Gain
  • 09:01:00 - Center of Dwell
  • 09:03:29 - VIIRS Encoder Offset Set Back to 0
  • 09:03:32 - VIIRS Gain set to Auto Gain
2019-02-15 21:49:35 - 21:56:34 Lunar Calibration Roll Maneuver Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 21:49:35 - VIIRS Encoder Offset Shift to 26790
  • 21:50:05 - Start of S/C Slew Roll
  • 21:51:05 - Finish Slew Maneuver, Start 4-minute Dwell
  • 21:53:05 - 01:04:26 - Center of Dwell
  • 21:55:05 - Start Return Slew Maneuver
  • 21:56:05 - Return to Nominal Mission Pointing
  • 21:56:34 - VIIRS Encoder Offset Set Back to 0
2019-01-17 09:02:31 - 09:15:30 Lunar Calibration Roll Maneuver Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 09:02:31 - VIIRS Encoder Offset Shift to 26790
  • 09:03:01 - Start of S/C Slew Roll
  • 09:06:01 - Finish Slew Maneuver, Start 4-minute Dwell
  • 09:08:01 - 01:04:26 - Center of Dwell
  • 09:10:01 - Start Return Slew Maneuver
  • 09:15:01 - Return to Nominal Mission Pointing
  • 09:15:30 - VIIRS Encoder Offset Set Back to 0
Failed Granules: 09:06
2018-12-18 18:22:31Z - 19:24:31Z Lunar Calibration Maneuver Instrument(s) Affected: All S-NPP Sensor Details/Specifics of change: On December 18, 2018, S-NPP will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -7.545 degrees centered at 18:47:31Z. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver and the CERES instrument will not provide nominal science data as it will placed in a contamination safe mode. The timeline of events for this maneuver are provided below.
Timeline: (UTC)
  • 18:22:31 Z - 19:24:31 Z CERES will be in Contam-Safe, science data will not be available
  • 18:37:31 Z - 18:59:31 Z HRD will be off, data for direct broadcast users will be unavailable
  • 18:42:01 Z - 18:55:00 Z VIIRS encoder offset and gain will be set for Moon observation
  • 18:42:31 Z - 18:54:31 Z S-NPP will be pointing off-nadir, collected data may be impacted and not disseminated
 Failed Granules: 18:48
2018-11-19 00:39:26 - 01:11:26 Lunar Calibration Maneuver Instrument(s) Affected: VIIRS
Timeline: (UTC)
  • 00:39:26 Z - 01:41:26 Z CERES will be in Contam-Safe, science data will not be available
  • 00:54:26 Z - 01:16:26 Z HRD will be off, data for direct broadcast users will be unavailable
  • 00:58:56 Z - 01:11:57 Z VIIRS encoder offset and gain will be set for Moon observation
  • 00:59:26 Z - 01:11:26 Z S-NPP will be pointing off-nadir, collected data may be impacted and not disseminated
 Failed Granules: 01:00, 01:06
2018-10-28 19:06:00.0 - 19:19:04.0 Risk Mitigation Maneuver Timeline:
  • 19:06:00.0 - NO Slew NOOP
  • 19:12:00.0 - Delta-V Burn Start
  • 19:12:00.2 - Orbit Epoch
  • 19:12:00.4 - Delta-V Burn End
  • 19:19:04.0 - Remain in Mission Point Mode
Description: S-NPP had a close approach with a piece of orbital debris requiring a No-Slew On-board Stored Mission Sequence (OSMS) with Delta-V Burn to safely avoid. The burn lasted 0.4 seconds. S-NPP stayed in Mission Point Mode throughout. OMPS was in Decon from 18:56-19:23:06z.		 Corrupt L1B geolocation: 19:06 - 19:12 (inclusive)
2018-09-27 16:39:12 - 17:09:23 Inclination Adjustment Maneuver #8 Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 16:39:12 - Slew Start
  • 16:52:12 - Delta-V Burn Start
  • 16:53:17.5 - Orbit Epoch
  • 16:54:23 - Delta-V Burn End
  • 17:07:23 - Return to Mission Point Mode
  • 17:09:23 - Reset Geolocation to correct errors induced by maneuvers
Corrupt L1B geolocation: 16:36 - 17:06 (inclusive)
2018-07-17 16:10:00 - 16:23:04 Drag Make-Up Maneuver (DMU) #28 Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 16:10:00:00 - Slew Start
  • 16:16:00:00 - Delta-V Burn Start
  • 16:16:00:35 - Orbit Epoch
  • 16:16:00:70 - Delta-V Burn End
  • 16:23:04:00 - Return to MPM
Notes: Non-MPM Duration: 13:04; OMPS Decon: 16:00:00 - 16:27:06		 Geolocation errors (16:06 - 16:18)
2018-06-23 12:50:19 - 12:55:23 Lunar Calibration Maneuver Instrument(s) Affected: VIIRS
Timeline: (UTC)
  • 12:50:19 - VIIRS Encoder Offset Shift to 26790
  • 12:52:51 - Center of Dwell
  • 12:55:23 - VIIRS Encoder Offset Set Back to 0
2018-05-25 04:59:34 - 05:06:33 Roll Maneuver Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 04:59:34 - VIIRS Encoder Offset Shift to 26790
  • 05:00:04 - Start of S/C Slew Roll
  • 05:01:04 - Finish Slew Maneuver, Start 4-minute Dwell
  • 05:03:04 - Center of Dwell
  • 05:05:04- Start Return Slew Maneuver
  • 05:06:04 - Return to Nominal Mission Pointing
  • 05:06:33 - VIIRS Encoder Offset Set Back to 0
Failed Granules: 05:00
2018-05-07 15:30 - 22:54 Bus Flip
Timeline: (UTC)
  • 15:30 - 15:36
  • 19:24 - 20:24
  • 21:12 - 22:06
  • 22:48 - 22:54
Notes:VIIRS 1394 Bus Flip from Bus Side B to Side A		 Corrupt L1B geolocation: (15:30, 22:48)
Failed Granules: 21:24
2018-04-25 19:25:34 - 19:37:34 Roll Maneuver Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 19:25:04 - VIIRS Encoder Offset Shift to 26790
  • 19:25:34 - Start of S/C Slew Roll
  • 19:28:34 - Finish Slew Maneuver, Start 4-minute Dwell
  • 19:30:34 - Center of Dwell
  • 19:32:34- Start Return Slew Maneuver
  • 19:37:34 - Return to Nominal Mission Pointing
  • 19:38:03 - VIIRS Encoder Offset Set Back to 0
Failed Granules: 19:30
2018-03-27 13:20:49 - 13:25:49 Roll Maneuver Instrument(s) Affected: VIIRS
Timeline: (UTC)
  • 13:20:49 - VIIRS Encoder Offset Shift to 26790
  • 13:21:20 - Start of Dwell
  • 13:23:20 - Center of Dwell
  • 13:25:20 - End of Dwell
  • 13:25:49 - VIIRS Encoder Offset Set Back to 0
2018-02-28 17:38:59 - 18:06:03 Drag Make-Up Maneuver Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 17:38:59 - OMPS in Decon
  • 17:48:59 - No Slew NOOP
  • 17:54:59 - Delta-V Burn Start
  • 17:55:00 - Orbit Epoch
  • 17:55:01 - Delta-V Burn End
  • 18:02:03 - Remain at MPM
  • 18:06:03 - OMPS out of Decon
 Corrupt L1B geolocation: 17:48-18:00 (inclusive)
2018-02-26 05:29:10 - 05:45:10 Roll Maneuver Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 05:29:10 - HRD/Direct-readout set to OFF
  • 05:33:40 - VIIRS Encoder Offset Shift to 26790
  • 05:34:10 - Start of S/C Slew Roll
  • 05:37:10 - Center of Dwell
  • 05:40:10 - Return to Nominal Mission Pointing
  • 05:40:39 - VIIRS Encoder Offset Set Back to 0
  • 05:45:10 - HRD/Direct-readout set to ON
2018-01-27 32396 20:07:45 - 20:20:46 Roll maneuver The lunar observation is centered at 20:13:15z. During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted to allow the Moon image to be captured in the middle of Earth view sector, and the dual gain bands gain mode are switched from Auto Gain to fixed High Gain (HG).
  • 13 min VIIRS SDRs/EDRs impacted period: 20:07:45 - 20:20:46z (sector rotation and HG).
  • 12 min S-NPP spacecraft pointing off nadir: 20:08:15 - 20:20:15z (maneuver).
Failed Granules: 20:12
2017-12-29 09:06 - 09:18 Roll Maneuver for VIIRS Lunar Calibration Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 08:48:00 - CERES in Contamination Safe Mode
  • 09:03:00 - HRD/Direct-readout set to OFF
  • 09:08:00 - Star of S/C Slew Roll
  • 09:13:00 - Center of Dwell
  • 09:20:00 - Return to Nominal Mission Pointing
  • 09:25:00 - HRD/Direct-readout set to ON
  • 09:50:00 - CERES set to Cross Track
Failed Granules: 09:12
2017-11-29 20:09:55 - 21:11:55 Lunar Calibration Instrument(s) Affected: VIIRS
Timeline: (UTC)
  • 20:09:55 - CERES commanded to Contam Safe
  • 20:24:55 - HRD Off
  • 20:29:26 - VIIRS Gain set to Fixed High Gain
  • 20:29:55 - Start Slew Maneuver
  • 20:34:55 - Center of Dwell (-6.0426°)
  • 20:41:55 - Return to Nadir Attitude
  • 20:42:26 - VIIRS Gain set to Auto Gain
  • 20:46:55 - HRD On
  • 21:11:55 - CERES commanded to CrossTrack
Failed Granules: 20:30, 20:36
2017-10-31 06:09:31 - 06:14:35 Lunar Calibration Instrument(s) Affected: VIIRS

Timeline: (UTC)
  • 06:09:31 - VIIRS DCRES=Off
  • 06:09:32 - VIIRS Encoder Offset Shift to 26790
  • 06:09:33 - VIIRS set to High Gain
  • 06:12:03 - Center of Calibration
  • 06:14:32 - VIIRS Encoder Offset shifted by 5978 to return offset to 0
  • 06:14:33 - VIIRS DCRES=on
  • 06:14:35 - VIIRS set to Auto Gain
2017-09-28 16:44:46Z - 19:00:42Z Inclination Adjustment Maneuver On September 28, 2017 at 17:17:46Z, S-NPP performed a 116.0 second propulsive Inclination Adjustment Maneuver (IAM) to maintain Mean Local Time of the Ascending Node (MLTAN) while controlling Repeating Ground Track box.

The following observatory systems are affected on September 28, 2017.
  • 16:44:46Z - 19:00:42Z CERES in Contam-Safe mode, science data will not be available
  • 16:54:46Z - 17:36:44Z OMPS in Decon mode, Science data will not be available
  • 16:59:46Z - 17:37:43Z HRD will be off, data for direct broadcast users will be unavailable
  • 17:04:46Z - 17:32:42Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated
Corrupt L1B geolocation: 17:00-17:30 (inclusive)
2017-07-19 15:54 - 18:01:04 Drag Make-Up Maneuver (DMU) #26 Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 15:54:00 - CERES ContamSafe
  • 16:04:00 - OMPS Decon Mode
  • 16:14:00 - Slew Start
  • 16:20:00:00 - Delta-V Burn Start
  • 16:20:00:40 - Orbit Epoch Non-MPM: 00:13:04
  • 16:20:00:80 - Delta-V Burn End
  • 16:27:04 - Return to Mission Point Mode
  • 16:31:06 - OMPS out of Decon Mode
  • 18:01:04 - CERES out of ContamSafe
Corrupt L1B geolocation:: 16:12-16:24 (inclusive)
2017-06-04 19:12 - 20:09Z Roll Maneuver On June 04, 2017, Suomi-NPP will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -1.243 degrees centered at 19:35:24Z. Science data may be impacted while the spacecraft is pointing off-Nadir during the attitude maneuver and the CERES instrument will not provide nominal science data as it will placed in a contamination safe mode. The timeline of events for this maneuver are provided below.

The following observatory systems will be affected on 2017 June 04:
  • 19:12:24 Z - 20:08:24 Z CERES will be in Contam-Safe, science data will not be available
  • 19:27:24 Z - 19:43:24 Z HRD will be off, data for direct broadcast users will be unavailable
  • 19:31:54 Z - 19:38:55 Z VIIRS encoder offset and gain will be set for Moon observation
  • 19:32:24 Z - 19:38:24 Z S-NPP will be pointing off-Nadir, collected data may be impacted and not disseminated
2017-05-06 6:15:35 - 7:17:35 Roll Maneuver Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 6:15:35 - CERES in Contamination Safe Mode
  • 6:30:35 - HRD/Direct-readout set to OFF
  • 6:35:35 - Start of S/C Slew Roll
  • 6:40:35 - Center of Dwell
  • 6:47:35 - Return to nominal mission pointing
  • 6:52:35 - HRD/Direct-readout set to ON
  • 7:17:35 - CERES set to Cross Track
Failed Granules: 06:36, 06:42
2017-04-06 19:02:42 - 20:04:42 Roll Maneuver Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 19:02:42 - CERES in Contamination Safe Mode
  • 19:17:42 - HRD/Direct-readout set to OFF
  • 19:22:42 - Start of S/C Slew Roll
  • 19:27:42 - Center of Dwell
  • 19:34:42 - Return to nominal mission pointing
  • 19:39:42 - HRD/Direct-readout set to ON
  • 20:04:42 - CERES set to Cross Track
Failed Granules: 19:24
2017-03-28 18:02:00 - 18:29:06 Drag Make-up Maneuver Instrument(s) Affected: ATMS, CrIS, OMPS, VIIRS (HRD OFF during non-nominal pointing)
Timeline: (UTC)
  • 18:02:00 OMPS in DECON Mode
  • 18:12:00 S/C No Slew NOOP Start (No off-nadir pointing, but some attitude disturbance)
  • 18:18:00 Delta-V Burn Start
  • 18:18:01 Delta-V Burn End
  • 18:25:04 Return to Nominal Mission Pointing
  • 18:29:06 OMPS out of DECON Mode
Corrupt L1B geolocation: 18:18
2017-03-08 09:36 - 10:32 Roll Maneuver Instrument(s) Affected: All Suomi-NPP Sensor Data

Details/Specifics of Change: * On March 08, 2017, Suomi-NPP will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -1.8989 degrees centered at 09:59:09Z. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver and the CERES instrument will not provide nominal science data as it will placed in a contamination safe mode.The timeline of events for this maneuver are provided below.

The following observatory systems are affected:
  • 09:36:09 Z - 10:32:09 Z CERES in Contam-Safe, science data is not be available
  • 09:51:09 Z - 10:07:09 Z HRD off, data for direct broadcast users will be unavailable
  • 09:55:39 Z - 10:02:40 Z VIIRS encoder offset and gain are set for Moon observation
  • 09:56:09 Z - 10:02:09 Z S-NPP is pointing off-nadir, collected data may be impacted and not disseminated
2017-02-07 00:08 - 01:11 Roll Maneuver Instrument(s) Affected: All Suomi-NPP Sensor Data

Details/Specifics of change:* On February 07, 2017, Suomi-NPP will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -3.794 degrees centered at 00:33:30Z. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver and the CERES instrument will not provide nominal science data as it will placed in a contamination safe mode. The timeline of events for this maneuver are provided below.

The following observatory systems will be affected on 2017 February 07:
  • 00:08:30 Z - 01:10:30 Z CERES will be in Contam-Safe, science data will not be available
  • 00:23:30 Z - 00:45:30 Z HRD will be off, data for direct broadcast users will be unavailable
  • 00:28:00 Z - 00:41:01 Z VIIRS encoder offset and gain will be set for Moon observation
  • 00:28:30 Z - 00:40:30 Z S-NPP will be pointing off-nadir, collected data may be impacted and not disseminated
Failed Granules: 00:30
2017-01-08 18:10:09 - 19:12:09 (UTC) Roll Maneuver Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
Timeline: (UTC)
  • 18:10:09 CERES in Contamination Safe Mode
  • 18:25:09 HRD/Direct-readout set to off
  • 18:30:09 Start of S/C Slew Roll
  • 18:35:09 Center of Dwell
  • 18:42:09 Return to nominal mission pointing
  • 18:47:09 HRD/Direct-readout set to on
  • 19:12:09 CERES set to Cross Track
 Failed Granules: 18:30, 18:36
2016-12-10 07:31:58 Z - 07:43:58 Z Roll Maneuver On December 10, 2016, Suomi-NPP performed a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -7.6607 degrees centered at 07:36:58Z. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver and the CERES instrument will not provide nominal science data as it will placed in a contamination safe mode. The timeline of events for this maneuver are provided below.

The following observatory systems are affected on 2016 December 10:
  • 07:11:58 Z - 08:13:58 Z CERES will be in Contam-Safe, science data will not be available
  • 07:26:58 Z - 07:48:58 Z HRD will be off, data for direct broadcast users will be unavailable
  • 07:31:28 Z - 07:44:29 Z VIIRS encoder offset and gain will be set for Moon observation
  • 07:31:58 Z - 07:43:58 Z S-NPP will be pointing off-nadir, collected data may be impacted and not disseminated
Failed Granules: 07:36
2016-11-10 20:33:56 - 20:45:56 Roll Maneuver Time line:
  • 20:13:56 CERES in Contamination Safe Mode
  • 20:28:56 HRD/Direct-readout set to off
  • 20:33:56 Start of S/C Slew Roll
  • 20:38:56 Center of Dwell
  • 20:45:56 Return to nominal mission pointing
  • 20:50:56 HRD/Direct-readout set to on
  • 21:15:56 CERES set to Cross Track
Failed Granules: 20:36
2016-09-29 17:10:26 - 19:25:40 Inclination maneuver Closed-Loop Inclination Adjustment Maneuver (IAM) #6 to maintain MLTAN
  • 17:10:26 CERES in Contamination Safe Mode
  • 17:20:26 OMPS in Decontamination Mode
  • 17:30:26 S/C Slew Start
  • 17:32:14 VIIRS Cryoradiator and CrIS Cooler Earth Pointing
  • 17:43:29 Delta-V Burn Start
  • 17:44:42 Delta-V Burn End
  • 17:51:53 VIIRS Cryoradiator and CrIS Cooler End Earth Pointing
  • 17:57:40 Return to Mission Point Model (MPM)
  • 18:01:42 OMPS out of Decontamination Mode
  • 19:25:40 CERES out of Contamination Safe Mode
Corrupt L1B geolocation: 17:30 - 19:06 (inclusive)
2016-09-13 16:05 - 16:19 DMU Corrupt L1B geolocation: 16:06 - 16:18 (inclusive)
2016-08-09 15:53 - 16:06 DMU Corrupt L1B geolocation: 15:54 - 16:00 (inclusive)
2016-06-15 18:33-18:38Z Lunar Calibration Roll Maneuver Suomi-NPP performs a VIIRS Lunar Calibration on June 15, 2016 centered at 18:36:12 UTC. VIIRS Science data will be impacted during the calibration. The timeline of events for this maneuver are provided below. The next Lunar Calibration will not occur until October 2016.

The following observatory systems will be affected on 2016 June 15:
    18:33:40 Z - 18:38:44 Z VIIRS encoder offset and gain will be set for Moon observation
2016-05-17 3:36:05 - 4:38:05 (UTC) Roll Maneuver Roll Maneuver (-2.6395°) for VIIRS Lunar Calibration (9-10 times per year)

Instrument(s) Affected: ATMS, CERES, CrIS, OMPS, VIIRS
  • 3:36:05 CERES in Contamination Safe Mode
  • 3:51:05 HRD/Direct-readout set to off
  • 3:56:05 Start of S/C Slew Roll
  • 4:01:05 Center of Dwell
  • 4:08:05 Return to nominal mission pointing
  • 4:13:04 HRD/Direct-readout set to on
  • 4:38:05CERES out of Contamination Safe Mode
Failed Granules: 04:00
2016-04-17 11:18 - 12:20Z Lunar Roll Maneuver On April 17, 2016, Suomi-NPP performed a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -3.6343 degrees centered at 11:43:12Z. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver and the CERES instrument will not provide nominal science data as it will placed in a contamination safe mode. The timeline of events for this maneuver are provided below.

The following observatory systems will be affected on April 17, 2016:
  • 11:18:12 Z - 12:20:12 Z CERES will be in Contam-Safe, science data will not be available
  • 11:33:12 Z - 11:55:12 Z HRD will be off, data for direct broadcast users will be unavailable
  • 11:37:41 Z - 11:50:43 Z VIIRS encoder offset and gain will be set for Moon observation
  • 11:38:12 Z - 11:50:12 Z S-NPP will be pointing off-nadir, collected data may be impacted and not disseminated
 Failed Granules: 11:42
2016-03-24 16:50 - 17:05 Drag Make-up Maneuver Drag Make-Up Maneuver (DMU) #23.
  • S/C Slew Start: 16:50 UTC
  • Delta-V Burn: 16:56 UTC (< 1s )
  • Return back to nominal mission point: 17:03 UTC
  • CERES in Contamination Safe mode: 16:30 - 18:37 UTC
  • OMPS in Decontamination mode: 16:40 - 17:05 UTC
Corrupt L1B geolocation: 16:48-17:00 (inclusive)
2016-03-18 20:43:23 - 21:45:23 UTC Roll Maneuver Roll maneuver (-2.8601) for VIIRS Lunar Calibration (centered at 21:08:23 UTC).
  • CERES in Contam-Safe mode: 20:43:23 - 21:45:23 UTC
  • HRD/Direct-readout set to off: 20:58:23 - 21:20:23 UTC
  • Start of S/C slew roll: 21:03:23 UTC
  • Center of dwell: 21:08:23 UTC
  • Return back to nominal mission pointing: 21:15:23 UTC
Failed Granules: 21:06
2016-02-24 17:21 - 17:49:04 Drag Make-up Maneuver Drag Make-Up Maneuver (DMU) #22. Orbit Correction was executed successfully.
  • S/C Slew Start: 17:31 UTC
  • Delta-V Burn: 17:37 UTC (0.4 seconds)
  • Return back to nominal mission point: 17:44:04 UTC
  • CERES in Contamination Safe mode: 17:11 . 19:18:04 UTC
  • OMPS in Decontamination mode: 17:21 . 17:48:06 UTC (Did not occur)
  • HRD off, data for direct broadcast users unavailable: 17:26 . 17:49:04 UTC
Corrupt L1B geolocation: 17:30-17:42 (inclusive)
2016-02-18 07:53:15 - 08:55:15Z Lunar Calibration Roll Maneuver Details/Specifics of Change: On February 18, 2016, Suomi-NPP will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -3.3312 degrees centered at 08:18:15Z. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver and the CERES instrument will not provide nominal science data as it will placed in a contamination safe mode.

The timeline of events for this maneuver are provided below. The following observatory systems will be affected on 2016 February 18:
  • 07:53:15Z - 08:55:15Z CERES will be in Contam-Safe, science data will not be available
  • 08:08:15Z - 08:30:15Z HRD will be off, data for direct broadcast users will be unavailable
  • 08:12:45Z - 08:25:46Z VIIRS encoder offset and gain will be set for Moon observation
  • 08:13:15Z - 08:25:15Z S-NPP will be pointing off-nadir, collected data during that time period may be impacted and not disseminated.
Failed Granules: 08:18
2016-01-19 22:49:15 - 23:02:16z Roll maneuver The S-NPP is scheduled to perform a roll maneuver (-5.3022 deg) on Jan 19, 2016 for VIIRS lunar calibration in orbit# 21913 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 22:54:45z. During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted to allow the Moon image to be captured in the middle of Earth view sector, and the dual gain bands gain mode will be switched from Auto Gain to fixed High Gain (HG).
  • 13 min VIIRS SDRs/EDRs impacted period: 22:49:15 - 23:02:16z (sector rotation and HG).
  • 12 min S-NPP spacecraft pointing off nadir: 22:49:45 - 23:01:45z (maneuver).
Failed Granules: 22:54
2015-12-21 13:10Z - 14:12Z Lunar Calibration Roll Maneuver Details/Specifics of Change: Suomi-NPP performed a spacecraft attitude maneuver, for the VIIRS Lunar Calibration, with a roll of -8.1760 degrees, centered at 2015-12-21T13:35:44 UTC. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver and the CERES instrument will not provide nominal science data as it will placed in a contamination safe mode. The timeline of events for this maneuver are provided below.

The following observatory systems will be affected on 2015 December 21:
  • 13:10:44 UTC - 14:12:44 UTC CERES will be in Cotam-Safe, science date will not be available
  • 13:25:44 UTC - 13:47:44 UTC HRD willbe off, data for direct broadcast users will be unavailable
  • 13:30:14 UTC - 13:43:15 UTC VIIRS encoder offset and gain will be set for Moon observation
  • 13:30:44 UTC - 13:42:44 UTC S-NPP will be pointing off-nadir and collected data during that time period may be impacted
Failed Granules: 13:36
2015-11-22 04:15:25Z - 04:27:25Z Lunar Roll Maneuver The following observatory systems were affected on 2015 November 22:
  • 03:55:25Z - 04:57:25Z CERES will be in Contam-Safe, science data will not be available
  • 04:10:25Z - 04:32:25Z HRD will be off, data for direct broadcast users will be unavailable
  • 04:14:55Z - 04:27:56Z VIIRS encoder offset and gain will be set for Moon observation
  • 04:15:25Z - 04:27:25Z S-NPP will be pointing off-nadir and collected data during that time period may be impacted
As a result there is a data loss for 11/22/15 04:15

04:12, 04:24- Corrupt M13 values, all QF OK, ignore.		 Failed Granules: 04:18
2015-11-05 23:40:00 - 23:53:01 Risk avoidance maneuver (RMM) Collision avoidance maneuver executed 05 Nov, ~23:46:00UT for 0.5 sec burn for space debris
Maneuver extended from 23:40:00 to 23:53:01		 Corrupt L1B geolocation: 23:36 - 23:48 (inclusive)
2015-10-23 18:59:24 - 19:05:24 UTC Lunar Roll Maneuver 7 min VIIRS SDRs/EDRs impacted period: 18:58:54 - 19:05:55z (sector rotation and HG)

6 min S-NPP spacecraft pointing off nadir: 18:59:24 - 19:05:24z (maneuver)
2015-09-23 16:47 - 19:03 UTC IAM#5 Suomi-NPP performed an out-of-plane maneuvers to adjust the Mean Local Time of Ascending Node (MLTAN) on Wednesday, September 23, 2015 at 17:20:49z.

The following observatory systems are affected on September 23, 2015:
  • 16:47:49 - 19:02:35z CERES in Contam-Safe mode, science data will not be available
  • 16:57:49 - 17:38:37z OMPS in Decon mode, science data will not be available
  • 17:02:49 - 17:39:35z HRD will be off, data for direct broadcast users will be unavailable
  • 17:07:49 - 17:34:35z S-NPP pointing off nadir and collected data during that time period may be impacted
Corrupt L1B geolocation: 17:06 - 18:48 (inclusive)
2015-06-27 14:14:39 - 14:19:42 UTC Lunar Calibration Roll Maneuver Suomi-NPP will perform a VIIRS Lunar Calibration on June 27, 2015 centered at 14:17:10 UTC. VIIRS Science data will be impacted during the calibration.

Impact:
14:14:39 UTC - 14:19:42 UTC VIIRS encoder offset and gain will be set for moon observation
Site/Spacecraft Affected: SNPP - VIIRS Science
Date/Time Start: 2015-06-27 T14:14:39 UTC
Date/Time Stop: 2015-06-27 T14:19:42 UTC
Duration: See Impact

1412 - Corrupt M13 values, all QF OK, ignore.
Granule 14:12 - Corrupt M13 values, all QF OK.
2015-05-29 18569 04:44:10 - 04:50:10z Roll Manuever The S-NPP is scheduled to perform a roll maneuver (-2.306 deg) on May 29, 2015 for VIIRS lunar calibration in orbit# 18569 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 04:47:10z.

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted to allow the Moon image to be captured in the middle of Earth view sector, and the dual gain bands gain mode will be switched from Auto Gain to fixed High Gain (HG).
  • 7 min VIIRS SDRs/EDRs impacted period: 04:43:40 - 04:50:41z (sector rotation and HG).
  • 6 min S-NPP spacecraft pointing off nadir: 04:44:10 - 04:50:10z (maneuver).
2015-04-30 18:03:00 - 18:26:03 UTC Drag Make-up (DMU) Maneuver #21 On 04/30/2015, SNPP performed a critical DMU maneuver to maintain repeating ground track. The propulsive burn lasted 2 seconds. The associated timeline and impacts to observatory components is as follows.
  • 17:48:00 UTC - 19:55:02 UTC: CERES in Contam-Safe, science data unavailable.
  • 17:58:00 UTC - 18:25:04 UTC: OMPS in Decon mode, science data unavailable
  • 18:03:00 UTC - 18:26:03 UTC: HRD off, data for direct broadcast users unavailable.
  • 18:08:00 UTC - 18:21:02 UTC: SNPP pointing off-nadir.
Corrupt L1B geolocation: 18:06 - 18:18 (inclusive)
2015-04-29 18148 12:23:57 - 12:36:58z The S-NPP is scheduled to perform a roll maneuver (-4.701 deg) on Apr 29, 2015 for VIIRS lunar calibration in orbit# 18148 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 12:29:27z.

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted to allow the Moon image to be captured in the middle of Earth view sector, and the dual gain bands gain mode will be switched from Auto Gain to fixed High Gain (HG).

13 min VIIRS SDRs/EDRs impacted period: 12:23:57 - 12:36:58z (sector rotation and HG).
12 min S-NPP spacecraft pointing off nadir: 12:24:27 - 12:36:27z (maneuver).		   Failed Granules: 12:24, 12:30
2015-03-30 17724 16:43:37 - 16:56:38 UTC S-NPP Lunar Roll Maneuver and VIIRS sector rotation 3/30/15 orbit 17724 from 16:43:37 to 16:56:38z

The S-NPP is scheduled to perform a roll maneuver (-5.238 deg) on Mar 30, 2015 for VIIRS lunar calibration in orbit# 17724 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 16:49:07z.

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted to allow the Moon image to be captured in the middle of Earth view sector, and the dual gain bands gain mode will be switched from Auto Gain to fixed High Gain (HG).

13 min VIIRS SDRs/EDRs impacted period: 16:43:37 - 16:56:38z (sector rotation and HG).
12 min S-NPP spacecraft pointing off nadir: 16:44:07 - 16:56:07z (maneuver).

16:42, 16:54 - Corrupt M13 values, all QF OK, ignore.		   Failed Granules: 16:48
2015-03-01 17303 00:28:52 - 00:41:53 UTC Lunar Calibration

Subject: S-NPP Lunar Roll Maneuver and VIIRS sector rotation 3/1/15 orbit 17303 from 00:28:52 to 00:41:53z

The S-NPP is scheduled to perform a roll maneuver (-4.048 deg) on Mar 1, 2015 for VIIRS lunar calibration in orbit# 17303 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 00:34:22z.

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted to allow the Moon image to be captured in the middle of Earth view sector, and the dual gain bands gain mode will be switched from Auto Gain to fixed High Gain (HG).

13 min VIIRS SDRs/EDRs impacted period: 00:28:52 - 00:41:53z (sector rotation and HG). 12 min geolocation pointing off nadir: 00:29:22 - 00:41:22z (maneuver).		 Details/Specifics of Change: Suomi-NPP will perform a spacecraft attitude maneuver, for the VIIRS Lunar Calibration, with a roll of -4.048 degrees centered at 2015-03-01T00:34:22 UTC. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver and the CERES instrument will not provide nominal science data as it will placed in a contamination safe mode. The timeline of events for this maneuver are provided below.

The following observatory systems will be affected on 2015 March 1:
  • 00:09:22 UTC - 01:11:22 UTC CERES will be in Contam-Safe, science data will not be available
  • 00:24:22 UTC - 00:46:22 UTC HRD will be off, data for direct broadcast users will be unavailable
  • 00:28:52 UTC - 00:41:53 UTC VIIRS encoder offset and gain will be set for Moon observation
  • 00:29:22 UTC - 00:41:22 UTC S-NPP will be pointing off-nadir and collected data during that time period may be impacted
 Failed Granules: 00:30, 00:36
2015-02-04 17:33:59 - 19:41:01 UTC Drag Make-Up Maneuver DMU #20 Details/Specifics of Change: On Wednesday, February 4, 2015 at 17:59:59 UTC Suomi-NPP will perform a critical Drag Make-Up (DMU) Maneuver to maintain repeating ground track. The propulsive burn will last 2 seconds.

Impact:
  • 17:33:59z - 19:41:01z CERES in Contam-Safe mode, science data will not be available
  • 17:43:59z - 18:11:03z OMPS in Decon mode, science data will not be available
  • 17:48:59z - 18:12:02z HRD will be off, data for direct broadcast users will be unavailable
  • 17:53:59z - 18:07:01z S-NPP pointing off nadir and collected data during that time period may be impacted and not disseminated.
Corrupt L1B geolocation: 17:54 - 18:00 (inclusive)
2015-01-30 16882 8:16:44 - 8:29:45 UTC Lunar Calibration Maneuver Description_Title: OPEN - S-NPP VIIRS Lunar Calibration 2015-01-30 MN_ID: MN022540 Date_Time: 2015-01-28 18:28:24 Mission_Notice_Text: Mission Notice Status: OPEN Description: S-NPP will perform a spacecraft attitude maneuver for VIIRS Lunar Calibration; a roll of -5.674 degrees, centered at 2015-01-30T08:22:14 UTC.

Impact:
  • 07:57:14 UTC - 08:59:14 UTC CERES will be in Contam-Safe
  • 08:12:14 UTC - 08:34:14 UTC HRD will be off
  • 08:16:44 UTC - 08:29:45 UTC VIIRS encoder offset and gain will be set for moon observation
  • 08:17:14 UTC - 08:29:14 UTC SNPP will be pointing off nadir
Site/Spacecraft Affected: SNPP - All Science Data Effected
Date/Time Start: 2015-01-30 T08:17:14 UTC
Date/Time Stop: 2015-01-30 T08:29:14 UTC
Duration: See Impact

08:12, 0824 - Corrupt M13 values, all QF OK.		 Failed Granules: 08:18
2014-12-31 19:13:08 - 20:15:08 UTC Lunar Roll Maneuver Details/Specifics of Change: Suomi-NPP will perform a spacecraft attitude maneuver, for the VIIRS Lunar Calibration, with a roll of -8.982 degrees centered at 2014-12-31T19:38:08 UTC. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver and the CERES instrument will not provide nominal science data as it will placed in a contamination safe mode. The timeline of events for this maneuver are provided below.

The following observatory systems will be affected on 2014 December 31:
  • 19:13:08 UTC - 20:15:08 UTC CERES will be in Contam-Safe, science data will not be available
  • 19:28:08 UTC - 19:50:08 UTC HRD will be off, data for direct broadcast users will be unavailable
  • 19:32:38 UTC - 19:45:39 UTC VIIRS encoder offset and gain will be set for Moon observation
Failed Granules: 19:36
2014-12-02 16046 8:36:14 - 8:49:15 UTC Lunar Roll Maneuver The S-NPP performed a roll maneuver (-10.841 deg) on Dec 2 for VIIRS lunar calibration in orbit# 16046 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector (target time 8:41:44z).

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted and the dual gain bands are set from Auto Gain mode to fixed High Gain (HG) mode.

13 min VIIRS SDRs/EDRs impacted period: 8:36:14 - 8:49:15z (sector rotation and HG).
12 min geolocation pointing off nadir: 8:36:44 - 8:48:44z (maneuver).

Granules 08:36, 08:48 corrupt M13 values, all QF ok.		 Failed Granules: 08:42
2014-11-12 16:54 - 19:10 UTC IAM#4 Details/Specifics of Change: On Wednesday, November 12, 2014 at 17:26:58 UTC Suomi-NPP will perform the fourth of a series of critical out-of-plane maneuvers to maintain a mean local time requirement.

Impact:
  • 16:53:58 UTC - 19:10:02 UTC CERES in Contam-Safe mode, science data will not be available
  • 17:03:58 UTC - 17:46:04 UTC OMPS in Decon mode, science data will not be available
  • 17:08:58 UTC - 17:47:02 UTC HRD will be off, data for direct broadcast users will be unavailable
  • 17:13:58 UTC - 17:42:02 UTC S-NPP pointing off nadir and collected data during that time period may be impacted

    IAM#4: 17:12:58 - 19:30:00 large geo error extends out 1.5 to 2 orbits.
 Corrupt L1B geolocation: 17:12 - 18:54 (inclusive)
2014-11-03 00:42:34 - 01:14:34 UTC Lunar Roll Maneuver Suomi-NPP will perform a spacecraft attitude maneuver, for the VIIRS Lunar Calibration, with a roll of -6.090 degrees centered at November 3, 2014 01:07:34 UTC. Science data may be impacted during the attitude maneuver and the CERES instrument will not provide nominal science data as it will be placed in a contamination safe mode. The timeline of events for this maneuver are provided below.

The following observatory systems will be affected on November 3, 2014:
  • 00:42:34 UTC - 01:44:34 UTC CERES will be in Contam-Safe, science data will not be available
  • 00:57:34 UTC - 01:19:34 UTC HRD will be off, data for direct broadcast users will be unavailable
  • 01:02:03 UTC - 01:15:05 UTC VIIRS encoder offset and gain will be set for moon observation
  • 01:02:34 UTC - 01:14:34 UTC S-NPP will be pointing off nadir and collected data during that time period may be impacted

    01:00 - Corrupt M13 values, all QF ok.
Failed Granules: 01:06
2014-10-30 16:12:59-18:20:01 UTC Drag Make-Up Maneuver DMU #19 On Thursday, October 30, 2014 at 16:38:59 UTC Suomi-NPP perform a critical Drag Make-Up (DMU) Maneuver to maintain repeating ground track. The propulsive burn will last 2 seconds.

The following observatory systems will be affected on October 30, 2014:
  • 16:12:59z - 18:20:01 UTC CERES in Contam-Safe mode, science data will not be available
  • 16:22:59z - 16:50:03 UTC OMPS in Decon mode, science data will not be available
  • 16:27:59z - 16:51:02 UTC HRD will be off, data for direct broadcast users will be unavailable
  • 16:32:59z - 16:46:01 UTC S-NPP pointing off nadir and collected data during that time period may be impacted and not disseminated.
Corrupt L1B geolocation: 16:30 - 16:42 (inclusive)
2014-10-15 17:21:46 UTC - 20:00:00 UTC IAM #3 October 15, 2014 at 17:54:46 UTC Suomi-NPP performed the third of a series of critical out-of-plane maneuvers to maintain a mean local time requirement.

The following observatory systems will be affected on October 15, 2014:
  • 17:21:46 - 19:38:14 UTC CERES in Contam-Safe mode, science data will not be available
  • 17:31:46 - 18:14:16 UTC OMPS in Decon mode, science data will not be available
  • 17:36:46 - 18:15:15 UTC HRD will be off, data for direct broadcast users will be unavailable
  • 17:41:46 - 18:10:14 UTC S-NPP pointing off nadir and collected data during that time period may be impacted

    IAM#3: 17:40:46 - 20:00:00 large geo error extends out 1.5 to 2 orbits.
 Corrupt L1B geolocation: 17:36 - 20:12 (inclusive)
2014-10-04 17:26:54 UTC - 17:31:26 UTC VIIRS Lunar Calibration, no-roll calibration / only sector rotation

The following observatory systems will be affected on October 4, 2014:
  • VIIRS Science data will be impacted during the calibration.
  • Impact: 17:26:54 UTC - 17:31:26 UTC VIIRS encoder offset and gain will be set for moon observation
  • Site/Spacecraft Affected: SNPP - VIIRS Science Date/Time Start: 2014-10-04 T17:26:54 UTC
  • Date/Time Stop: 2014-10-04 T17:31:26 UTC
  • Duration: 4 minutes and 32 seconds
    17:30 - Corrupt M13 values, all QF OK.
  
2014-09-29 T21:01:38 UTC - T23:08:39 UTC Risk Mitigation Maneuver Impact: SNPP requires a Risk Mitigation Maneuver.
Site/Spacecraft Affected: SNPP
Date/Time Start: 2014-09-29 T21:01:38 UTC
Date/Time Stop: 2014-09-29 T23:08:39 UTC

Duration: Two hours and seven minutes

Details: On Monday, September 29, 2014 at 21:27:38 UTC Suomi-NPP will perform a critical Risk Mitigation Maneuver. The propulsive burn will last 1 second.

The following observatory systems will be affected on September 29, 2014:
  • 21:01:38 - 23:08:39 UTC CERES in Contam-Safe mode, science data will not be available
  • 21:12:38 - 21:38:41 UTC OMPS in Decon mode, science data will not be available
  • 21:47:11 UTC OMPS Science will begin production
  • 21:16:38 - 21:39:40 UTC HRD will be off, data for direct broadcast users will be unavailable
  • 21:21:38 - 21:34:39 UTC S-NPP pointing off nadir and collected data during that time period may be impacted
Corrupt L1B geolocation: 21:18 - 21:30 (inclusive)
2014-09-10 18:40:35 - 21:00:00 IAM#2 Product(s) or Data Impacted: All Suomi-NPP Sensor Data
Date/Time of Initial Impact: September 10, 2014 1821 UTC Date/Time of Expected End: September 10, 2014 2037 UTC

Length of Outage: See Details
Details/Specifics of Change: On Wednesday, September 10, 2014 at 18:54:35 UTC Suomi-NPP will perform the second of a series of critical mandatory out-of-plane maneuvers to maintain a mean local time requirement.

The following observatory systems will be affected on September 10, 2014:
  • 18:21:35 - 20:37:12 UTC CERES in Contam-Safe mode, science data will not be available
  • 18:32:35 - 19:13:14 UTC OMPS in Decon mode, science data will not be available
  • 18:36:35 - 19:14:13 UTC HRD will be off, data for direct broadcast users will be unavailable
  • 18:41:35 - 19:09:12 UTC S-NPP pointing off nadir and collected data during that time period may be impacted

Corrupt L1B geolocation: 18:36 - 20:24 (inclusive)
2014-08-08 14:13:00 - 18:48:42 DMU#18 Due to solar array vibe --> S-NPP entered Earth Safe mode, VIIRS entered Safe Hold @14:21:02 until 18:48:42z.

 Corrupt L1B geolocation: 14:12 - 18:42 (inclusive)
Failed Granules: 14:24 through 18:42
2014-07-30 21:54:20 UTC - 22:19:28 UTC Inclination Adjustment Maneuver (1) UPDATE #1:
The primary burn opportunity was not executed due to loss of communication prior to activating the burn. Data impacts detailed for the primary burn are still valid. A secondary opportunity will be executed with a burn time of 22:07:20 UTC.

The following observatory systems will be affected on July 30, 2014 for the secondary burn opportunity:

  • 21:34:20 - 23:49:17 UTC CERES in Contam-Safe mode, science data will not be available
  • 21:44:20 - 22:23:30 UTC OMPS in Decon mode, science data will not be available
  • 21:49:20 - 22:24:29 UTC HRD will be off, data for direct broadcast users will be unavailable
  • 21:54:20 - 22:19:28 UTC S-NPP pointing off nadir and collected data during that time period may be impacted

Product(s) or Data Impacted: All Suomi-NPP Sensor Data
Date/Time of Initial Impact: July 30, 2014 1811 UTC
Date/Time of Expected End: July 30, 2014 2026 UTC

Length of Outage: See Details
Details/Specifics of Change: On Wednesday, July 30, 2014 at 18:41:32 UTC Suomi-NPP will perform the first of a series of critical mandatory out-of-plane maneuvers to maintain a mean local time requirement. A series of 3-4 additional maneuvers are to be executed over the next few months. Each maneuver will be detailed in subsequent user notifications

The following observatory systems will be affected on July 30, 2014:

  • 18:11:21 - 20:26:18 UTC CERES in Contam-Safe mode, science data will not be available
  • 18:21:21 - 19:00:31 UTC OMPS in Decon mode, science data will not be available
  • 18:26:21 - 19:01:30 UTC HRD will be off, data for direct broadcast users will be unavailable
  • 18:31:21 - 18:56:29 UTC S-NPP pointing off nadir and collected data during that time period may be impacted
    IAM#1: 21:53:20 - 23:59:59 large geo error extends out 1.5 to 2 orbits
Corrupt L1B geolocation: 21:54 - 23:36 (inclusive)
2014-07-30 18:30:00- 22:20 Lunar Calibration Roll Maneuver 2014-07-30 18:30 to 2014-07-30 19:00

18:30 Geolocation errors, Reflectance corrupt 18:36 - 18:48. Scan QF and band QF all report 0, corrupt granules are not flagged.		 Corrupt L1B geolocation: 18:30-18:54 (inclusive)
2014-07-01 17:40:00- 17:53:42 DMU#17 DMU#17: 17:40:00- 17:53:42
 Corrupt L1B geolocation: 17:36 - 17:54 (inclusive)
2014-06-09 03:46:27 UTC - 03:50:58 UTC Lunar Calibration Description: Suomi-NPP will perform a VIIRS Lunar Calibration on June 9, 2014 at 03:48:42 UTC. VIIRS Science data will be impacted during the calibration.

Impact:
03:46:27 UTC - 03:50:58 UTC VIIRS encoder offset and gain will be set for moon observation

Site/Spacecraft Affected: SNPP - VIIRS Science
Date/Time Start: 2014-06-09 T03:46:27 UTC
Date/Time Stop: 2014-06-09 T03:50:58 UTC

Duration: 03:46:27 UTC - 03:50:58 UTC		  
2014-05-10 12:48:00 UTC - 13:50:00 UTC Lunar Calibration Description: S-NPP will perform a spacecraft attitude maneuver for VIIRS Lunar Calibration; a roll of -4.178 degrees, centered at 2014-05-10T13:13:00 UTC.

Impact:
12:48:00 UTC - 13:50:00 UTC CERES will be in Contam-Safe
13:03:00 UTC - 13:25:00 UTC HRD will be off
13:07:30 UTC - 13:20:31 UTC VIIRS encoder offset and gain will be set for moon observation
13:08:00 UTC - 13:20:00 UTC SNPP will be pointing off nadir

Site/Spacecraft Affected: SNPP - All Science Data Effected
Date/Time Start: 2014-05-10 T12:48:00 UTC
Date/Time Stop: 2014-05-10 T13:50:00 UTC

Duration: See Impact		 Failed Granules: 13:12
2014-04-10 20:28:16 UTC - 21:30:16 UTC Lunar Calibration Description: S-NPP will perform a spacecraft attitude maneuver for VIIRS Lunar Calibration; a roll of -4.976 degrees, centered at 2014-04-10T20:53:16 UTC.

Impact:
20:28:16 UTC - 21:30:16 UTC CERES will be in Contam-Safe
20:43:16 UTC - 21:05:16 UTC HRD will be off
20:47:45 UTC - 21:00:47 UTC VIIRS encoder offset and gain will be set for moon observation
20:48:16 UTC - 21:00:16 UTC SNPP will be pointing off nadir

Site/Spacecraft Affected: SNPP - All Science Data Effected
Date/Time Start: 2014-04-10 T20:28:16 UTC
Date/Time Stop: 2014-04-10 T21:30:16 UTC

Duration: One Hour and Two Minutes		 Failed Granules: 20:48, 20:54
2014-03-12 17:23 - 17:34 DMU#16 DMU#16: 17:23:00 - 17:34:58
 Corrupt L1B geolocation: 17:24 - 17:30 (inclusive)
2014-03-12 00:46:43-01:48:43 Lunar Calibration Description: S-NPP will perform a spacecraft attitude maneuver for VIIRS Lunar Calibration; a roll of -3.945 degrees, centered at 2014-03-12T01:11:43 UTC.

Impact:
00:46:43 UTC . 01:48:43 UTC CERES will be in Contam-Safe
01:01:43 UTC . 01:23:43 UTC HRD will be off
01:06:13 UTC . 01:19:14 UTC VIIRS encoder offset and gain will be set for moon observation
01:06:43 UTC . 01:18:43 UTC SNPP will be pointing off nadir

Site/Spacecraft Affected: SNPP - All Science Data Effected
Date/Time Start: 2014-03-12 T00:46:43 UTC
Date/Time Stop: 2014-03-12 T01:48:43 UTC

Duration: One hour and two minutes
01:06, 01:18 - Corrupt M13 values, all QF OK		 Failed Granules: 01:12
2014-03-04   8 Yaws Maneuver Operated in OPS mode
Start/End Slew: 7:31:06/7:42:16
Start/End Dwell: 7:32:06/7:41:16

Start/End Slew: 9:12:37/9:23:47
Start/End Dwell: 9:13:37/9:22:47

Start/End Slew: 10:54:07/11:05:17
Start/End Dwell: 10:55:07/11:04:17

Start/End Slew: 12:35:38/12:46:48
Start/End Dwell: 12:36:38/12:45:48

Start/End Slew: 14:17:08/14:28:18
Start/End Dwell: 14:18:08/14:27:18

Start/End Slew: 15:58:38/16:09:48
Start/End Dwell: 15;59:38/16:08:48

Start/End Slew: 17:47:59/17:55:29
Start/End Dwell: 17:48:59/17:54:29

Start/End Slew: 19:29:29/19:36:59
Start/End Dwell: 19:30:29/19:35:59		  
2014-02-20 18:15:34-18:59:19 Pitch Back Flip
2014-02-10 05:09:12-05:41:12 Lunar Calibration 3 min VIIRS SDRs/EDRs impacted period: 5:28:42 - 5:41:43z (sector rotation and HG).

12 min geolocation pointing off nadir: 5:29:12 - 5:41:12z (maneuver).
05:36 - Corrupt M13 values, all QF OK		 Failed Granules: 05:30
2014-01-21 2014-01-21 20:48:20 Risk Mitigation Maneuver Product(s) or Data Impacted: All SNPP SMD data may be degraded if this maneuver is actually executed. No data should be lost

Date/Time Start: January 21, 2014 approx. 1930 UTC
Date/Time End: January 21, 2014 approx. 2030 UTC
Length of Event: 60 minutes

Details/Specifics of Change
This notice is designed to forewarn SNPP SMD Data users that the SNPP Observatory may have to perform an RMM at the time specified above. If the RMM is executed SMD data will be degraded as the S/C will be off nominal pointing.		 Corrupt L1B geolocation: 19:36 - 19:48 (inclusive)
2014-01-11 2014-01-11T09:59:45 UTC Lunar Calibration 09:34:45 UTC - 11:47:45 UTC CERES will be in Contam-Safe
09:49:45 UTC - 10:11:45 UTC HRD will be off
09:54:15 UTC - 10:07:16 UTC VIIRS encoder offset and gain will be set for moon observation
09:54:45 UTC - 10:06:45 UTC SNPP will be pointing off nadir

Site/Spacecraft Affected: SNPP - All Science Data
Effected Date/Time Start: 2014-01-11 T09:34:45 UTC
Date/Time Stop: 2014-01-11 T11:47:45 UTC
Duration: Two hours and thirteen minutes
09:54 - Corrupt M13 values, all QF OK		 Failed Granules: 10:00
2013-12-12 19:35:46-21:23:46 UTC Lunar Calibration 19:25:46z - 21:23:46z CERES will be in Contam-Safe
19:25:46z - 19:47:46z HRD will be off
19:30:15z - 19:43:17z VIIRS encoder offset and gain will be set for moon observation
19:30:46z - 19:42:46z SNPP will be pointing off nadir

Site/Spacecraft Affected: SNPP - All Science Data
Effected Date/Time Start: 2013-12-12 T19:25:46 UTC
Date/Time Stop: 2013-12-12 T21:23:46 UTC

Duration: One hour and Fifty-Eight minutes

19:30 - Corrupt M13 values, all QF OK.		 Failed Granules: 19:36
2013-11-29 17:33:01 - 17:44: DMU#15 DMU#15
 Corrupt L1B geolocation: 17:30-17:42 (inclusive)
2013-11-13 10597 6:52:11 - 7:05:12z Roll Manuever 13 min VIIRS SDRs/EDRs impacted period: 6:52:11 - 7:05:12z (sector rotation)
12 min geolocation pointing off nadir: 6:52:41 - 7:04:41z (maneuver)

06:48 - Corrupt M13 values, all QF OK.		 Failed Granules: 06:54
2013-10-14 21:16:19-23:23:19 Lunar Maneuver SNPP will perform a spacecraft attitude maneuver for VIIRS Lunar Calibration
21:16:19 UTC . 23:23:19 UTC CERES will be in Contam-Safe
21:31:19 UTC . 21:47:19 UTC HRD will be off 21:35:49 UTC . 21:42:50 UTC
VIIRS encoder offset and gain will be set for moon observation
21:36:19 UTC . 21:42:19 UTC SNPP will be pointing off nadir

Site/Spacecraft Affected: SNPP
Date/Time Start: 2013-10-14T21:16:19 UTC
Date/Time Stop: 2013-10-14T23:23:19 UTC		 Failed Granules: 21:36
2013-07-16 18:31:00-20:43:04 Routine Drag Make-Up Maneuver (DMU 14). CERES and OMPS out of science modes.
Date/Time Start: 2013-07-16T18:31:00 UTC
Date/Time Stop : 2013-07-16T20:43:04 UTC

Duration: 2 Hours and 12 Minutes		 Corrupt L1B geolocation: 18:48-19:00 (inclusive)
2013-05-21 8101 50.67 The VIIRS is scheduled to perform sector rotation for lunar observation in orbit 8101 on May 21st. This operation activity allows the Moon image to be captured in the middle of Earth data sector (target time at 8:43:15z). Roll maneuver is not required this time.
During the sector rotation, the VIIRS calibrators and Earth view data sectors are shifted, and the dual gain bands are set to fixed gain mode at High Gain (HG) state.
Time period of SDRs/EDRs impacted by this activity: 8:41:00 to 8:45:31z (sector rotation).		 May VIIRS Lunar Cal Sector Rotation and fixed High Gain.
8:41:00 VIIRS Encoder Offset Shift to 26790
8:41:01 VIIRS Gain to Fixed High Gain
8:41:15 Start 4 min dwell
8:43:15 Center of Dwell - targeted time
8:45:15 End dwell
8:45:29 VIIRS Encoder Offset back to 0
8:45:31 VIIRS Gain back to Auto Gain
(No Roll needed)

08:36 - Corrupt M13 values, all QF OK.		  
2013-04-21 7682 50.83 19:42:54 - 19:54:54 The NPP is scheduled to perform a roll maneuver (-3.8818 deg) on April 21st for VIIRS lunar calibration in orbit 7682 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector (target time 19:47:54z).

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted and the dual gain bands will be set to fixed gain mode at High Gain state.

13 min sector rotation, SDRs/EDRs impacted by this activity: 19:42:24 - 19:55:25z. 12 min maneuver, spacecraft geolocation pointing off nadir: 19:42:54 - 19:54:54z.		 April Lunar Roll Maneuver-VIIRS Lunar Cal Roll with Sector Rotation and fixed High Gain.
19:42:24 VIIRS Encoder Offset Shift to 26790
19:42:25 VIIRS Gain to Fixed High Gain
19:42:54 Maneuver (Roll) to -3.8818 deg attitude, 180 seconds
19:45:54 End maneuver; Start 4 min dwell
19:47:54 Center of Dwell - Targetted roll angle time
19:49:54 Maneuver to Nadir attitude, 300 seconds
19:54:54 End maneuver
19:55:23 VIIRS Encoder Offset back to 0
19:55:25 VIIRS Gain back to Auto Gain		 Failed Granules: 19:48
2013-03-23 03:04:00 - 05:17:00   NPP will perform a spacecraft attitude maneuver for VIIRS Lunar Calibration; a roll of -3.3196 degrees, centered at 2013-03-23T03:29:00z.

Impact:
03:04:00z - 05:17:00z CERES will be in Contam-Safe
03:19:00z - 03:41:00z HRD will be off
03:23:30z - 03:36:31z VIIRS encoder offset and gain will be set for moon observation
03:24:00z - 03:36:00z NPP will be pointing off nadir

Site/Spacecraft Affected: NPP - All Science Data Effected
Date/Time Start: 2013-03-23 03:04:00z
Date/Time Stop: 2013-03-23 05:17:00z

Duration: two hours and thirteen minutes		 Failed Granules: 03:24, 03:30
2013-02-24 11:14 - 11:28 NPP Risk Mitigation Maneuver 17:31:00-17:44:04z NPP pointing off-nadir
 Corrupt L1B geolocation: 11:12-11:24 (inclusive)
2013-02-21 6838 50.71 9:28:25 - 9:34:25 The NPP is scheduled to perform a roll maneuver (-1.7121 deg) on February 21st for VIIRS lunar calibration in orbit 6838 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector (target time 9:31:25z).

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted and the dual gain bands will be set to fixed gain mode at High Gain state.

7 min SDRs/EDRs impacted by this activity: 9:27:55 - 9:34:56z (sector rotation). 6 min geolocation pointing off nadir: 9:28:25 - 9:34:25z (maneuver).		 February Lunar Roll Maneuver-VIIRS Lunar Cal Roll with Sector Rotation and fixed High Gain.
9:27:55 VIIRS Encoder Offset Shift to 26790 (S/C DAS)
9:27:56 VIIRS Gain to Fixed High Gain (S/C DAS)
9:28:25 Maneuver (Roll) to -1.7121 deg attitude, 60 seconds
9:29:25 End maneuver; Start 4 min dwell
9:31:25 Center of Dwell - Targetted roll angle time
9:33:25 Maneuver to Nadir attitude, 60 seconds
9:34:25 End maneuver
9:34:54 VIIRS Encoder Offset back to 0 (S/C DAS)
9:34:56 VIIRS Gain back to Auto Gain (S/C DAS)		  
2013-01-22 6414 50.81 12:08:35 - 12:20:35 The NPP is scheduled to perform a roll maneuver (-3.3826 deg) on January 22nd for VIIRS lunar calibration in orbit 6414 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the Earth view sector (target time 12:13:35z).

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted and the dual gain bands will be set to fixed gain mode at High Gain state.

13 min SDRs/EDRs impacted by this activity: 12:08:05 - 12:21:06z (sector rotation). 12 min geolocation pointing off nadir: 12:08:35 - 12:20:35z (maneuver).		 January Lunar Roll Maneuver-VIIRS Lunar Cal Roll with Sector Rotation and fixed High Gain.
12:08:05 VIIRS Encoder Offset Shift to 26790 (S/C DAS)
12:08:06 VIIRS Gain to Fixed High Gain (S/C DAS)
12:08:35 Maneuver (Roll) to -3.3826 deg attitude, 180 seconds
12:11:35 End maneuver; Start 4 min dwell
12:13:35 Center of Dwell - Targetted roll angle time
12:15:35 Maneuver to Nadir attitude, 300 seconds
12:20:35 End maneuver
12:21:04 VIIRS Encoder Offset back to 0 (S/C DAS)
12:21:06 VIIRS Gain back to Auto Gain (S/C DAS)		 Failed Granules: 12:12
2013-01-15 15:18-15:29 DMU#13 DMU#13: 15:18:01 - 15:29:54
 Corrupt L1B geolocation: 15:18 - 15:24 (inclusive)
2012-12-23 5990 50.9 14:55:50 - 15:07:50 The NPP is scheduled to perform a roll maneuver (-7.7668 deg) on December 23rd for VIIRS lunar calibration in orbit 5990 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector (target time at 15:00:50z).

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted and the dual gain bands will be set to fixed gain mode at High Gain state.

The SDRs/EDRs impacted by this activity are from 14:55:20 to 15:08:21 (sector rotation). There will be 12 minutes pointing off nadir from 14:55:50 to 15:07:50z (maneuver).		 December Lunar Roll Maneuver-VIIRS Lunar Cal Roll with Sector Rotation and fixed High Gain.
14:55:20 VIIRS Encoder Offset Shift to 26790 (S/C DAS)
14:55:21 VIIRS Gain to Fixed High Gain (S/C DAS)
14:55:50 Maneuver (Roll) to -7.7668 deg attitude, 180 seconds
14:58:50 End maneuver; Start 4 min dwell
15:00:50 Center of Dwell - Targetted roll angle time
15:02:50 Maneuver to Nadir attitude, 300 seconds
15:07:50 End maneuver
15:08:19 VIIRS Encoder Offset back to 0 (S/C DAS)
15:08:21 VIIRS Gain back to Auto Gain (S/C DAS)		  
2012-11-23 5569 50.74 21:13:20 - 21:25:20 The NPP performed a roll maneuver (-9.4289 deg) on November 23rd for VIIRS lunar calibration in orbit 5569 with VIIRS sector rotation (encoder offset) to allow the Moon image captured in the middle of Earth view sector (target time at 21:18:20z).

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted and the dual gain bands are set to fixed gain mode at High Gain state.

The SDRs/EDRs impacted by this activity are from 21:12:50 to 21:25:51z (sector rotation). There was 12 minutes pointing off nadir from 21:13:20 to 21:25:20z (maneuver).		 November Lunar Roll Maneuver-VIIRS Lunar Cal Roll with Sector Rotation and fixed High Gain.
21:12:50 VIIRS Encoder Offset Shift to 26790 (S/C DAS)
21:12:51 VIIRS Gain to Fixed High Gain (S/C DAS)
21:13:20 Maneuver (Roll) to -9.4289 deg attitude, 180 seconds
21:16:20 End maneuver; Start 4 min dwell
21:18:20 Center of Dwell - Targetted roll angle time
21:20:20 Maneuver to Nadir attitude, 300 seconds
21:25:20 End maneuver
21:25:49 VIIRS Encoder Offset back to 0 (S/C DAS)
21:25:51 VIIRS Gain back to Auto Gain (S/C DAS)		  
2012-10-25 5149 51.02 06:53:15 - 07:05:15 The NPP is scheduled to perform a roll maneuver (-4.0485 deg) on October 25th for VIIRS lunar calibration in orbit 5149 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector (target time at 6:58:15z).

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted, and the dual gain bands will be fixed at High Gain state.

The SDRs and EDRs impacted by this activity are from 6:52:45 to 7:05:46z (sector rotation). There will be 12 minutes pointing off nadir from 6:53:15 to 7:05:15z.		 October Lunar Roll Maneuver-VIIRS Lunar Cal Roll with Sector Rotation and fixed High Gain.
6:52:45 VIIRS Encoder Offset Shift to 26790 (S/C DAS)
6:52:46 VIIRS Gain to Fixed High Gain (S/C DAS)
6:53:15 Maneuver (Roll) to -4.0485 deg attitude, 180 seconds
6:56:15 End maneuver; Start 4 min dwell
6:58:15 Center of Dwell - Targetted roll angle time
7:00:15 Maneuver to Nadir attitude, 300 seconds
7:05:15 End maneuver
7:05:44 VIIRS Encoder Offset back to 0 (S/C DAS)
7:05:46 VIIRS Gain back to Auto Gain (S/C DAS)		 Failed Granules: 06:54
2012-10-09 15:58-16:12 NPP Drag Make-Up Maneuver (12) DMU#12: 15:58:01 - 16:12:16z
The propulsive burn lasted one second. S/C off-nadir pointing from 15:59:00 - 16:12:30
 Corrupt L1B geolocation: 15:54 - 16:06 (inclusive)
2012-06-26 19:05 - 19:20 NPP Drag Make-Up Maneuver (11) DMU#11: 19:05:38n- 19:20:08z
Corrupt L1B geolocation: 19:06 - 19:18 (inclusive)
2012-05-31 3068 52.97 The VIIRS is scheduled to perform sector rotation (encoder offset) on May 31st for lunar observation in orbit 3068 to allow the space view Moon image to be captured in the middle of Earth view sector (target time at 14:47:13z). There will be no roll maneuver this time. May VIIRS Lunar Cal Sector Rotation and fixed High Gain.
14:44:43 VIIRS Encoder Offset Shift to 26790 (S/C DAS)
14:44:44 VIIRS Gain to Fixed High Gain (S/C DAS)
14:49:42 VIIRS Encoder Offset back to 0 (S/C DAS)
14:49:43 VIIRS Gain back to Auto Gain (S/C DAS)
(No Roll needed)		 No Maneuver took place.
2012-05-02 2654 50.92 10:15:06 - 10:27:06 The NPP is scheduled to perform a roll maneuver on May 2nd for VIIRS lunar calibration in orbit 2654 with VIIRS sector rotation (encoder offset) to allow space view Moon image to be captured in the middle of Earth view sector (target at 10:20:06z).

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted, and the dual gain bands will be set to High Gain state.

The SDRs and EDRs impacted by this activity are from 10:14:36 to 10:27:37z (sector rotation). The 12 minutes roll maneuver will be from 10:15:06 to 10:27:06z.		 May Lunar Roll Maneuver-VIIRS Lunar Cal Roll with Sector Rotation and fixed High Gain.
10:14:36 VIIRS Encoder Offset Shift to 26790 (S/C DAS)
10:14:37 VIIRS Gain to Fixed High Gain (S/C DAS)
10:15:06 Maneuver (Roll) to -3.2275 deg attitude, 180 seconds
10:18:06 End maneuver; Start 4 min dwell
10:20:06 Center of Dwell - Targetted roll angle time
10:22:06 Maneuver to Nadir attitude, 300 seconds
10:27:06 End maneuver
10:27:35 VIIRS Encoder Offset back to 0 (S/C DAS)
10:27:37 VIIRS Gain back to Auto Gain (S/C DAS)
Failed Granules: 10:18
2012-04-16 13:24 - 13:30 No reference available
2012-02-22 15:18 to 2012-02-22 15:24
Failed Granules: 13:24
2012-04-02 2235 51.24 23:00:11 - 23:12:11 The NPP performed a roll maneuver yesterday (4/2) in orbit 2235 while VIIRS was carrying out a sector rotation (encoder offset) to capture the space view Moon image (center at 23:05:11z) in the middle of Earth view sector. During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted. The SDRs and EDRs impacted by this activity are from ~22:59z to 23:13z. April Lunar Roll Maneuver-VIIRS Lunar Cal Roll with Sector Rotation and fixed High Gain.
22:59:41 VIIRS Encoder Offset Shift to 26790 (S/C DAS)
22:59:42 VIIRS Gain to Fixed High Gain (S/C DAS)
23:00:11 Maneuver (Roll) to -3.9893 deg attitude, 180 seconds
23:03:11 End maneuver; Start 4 min dwell
23:05:11 Center of Dwell - Targetted roll angle time
23:07:11 Maneuver to Nadir attitude, 300 seconds
23:12:11 End maneuver
23:12:40 VIIRS Encoder Offset back to 0 (S/C DAS)
23:12:42 VIIRS Gain back to Auto Gain (S/C DAS)		 Failed Granules: 23:00, 23:06
2012-03-03 1810 23:34:14 - 23:46:44 The NPP performed a roll maneuver yesterday (3/3) in orbit 1810 while VIIRS was carrying out a sector rotation (encoder offset) activity.

During the sector rotation, the VIIRS calibrators and Earth view sectors data are shifted. The SDRs and EDRs impacted by this activity are from ~23:34z to 23:48z.		 March Lunar Roll Maneuver-VIIRS Lunar Cal Roll with Sector Rotation and fixed High Gain.
23:34:14 VIIRS Encoder Offset Shift to 26790 (VIIRS DAS)
23:34:15 VIIRS Gain to Fixed High Gain (VIIRS DAS)
23:34:44 Maneuver (Roll) to -6.1512 deg attitude, 180 seconds
23:37:44 End maneuver; Start 4 min dwell
23:39:44 Center of Dwell - Targetted roll angle time
23:41:44 Maneuver to Nadir attitude, 300 seconds
23:46:44 End maneuver
23:47:14 VIIRS Encoder Offset back to 0 (VIIRS DAS)
23:47:15 VIIRS Gain back to Auto Gain (VIIRS DAS)
NOTE: March Moon image was not captured due to an error in the lunar roll prediction table.		 Failed Granules: 23:36
2012-02-22 15:18 - 15:24 VIIRS Sector Rotation Complete No reference available
2012-02-22 15:18 to 2012-02-22 15:24
Failed Granules: 15:18
2012-02-20 18:24- 18:48 NPP S/C Pitch Maneuver NPP S/C Pitch Maneuver
 Failed Granules: 18:24, 18:30, 18:36, 18:42
2012-02-17 2012-02-17 no ref 2012-02-17 no ref 1 pitch slew
slew only; NOAA site does not report event, no data gaps
2012-02-16 2012-02-16 no ref 2012-02-16 no ref VIIRS 14 SD yaw cal, +1 pitch slew
slew only; NOAA site does not report event, no data gaps
2012-02-15 2012-02-15 13:37 to 2012-02-16 13:36 NPP Yaw Maneuvers for OMPS/VIIRS
Maneuvers were conducted on 15 consecutive orbits
slew only
2012-02-10 2012-02-10 20:53 to 2012-02-11 08:49 NPP Attitude Maneuver NPP Attitude Maneuver: MN015375
no signature in geolocation team review, Attitude nominal
2012-02-03 1388 55.38 5:58:34 - 6:10:34 Roll Maneuver for VIIRS Lunar Calibration VIIRS Lunar Cal #8a - #2
5:58:34 Maneuver (roll) to -5.2794 deg attitude, 180 seconds
6:01:34 End maneuver; start 4 min dwell
6:03:34 Center of Dwell - Targeted roll angle time
6:05:34 Maneuver to Nadir attitude
6:10:34 End Maneuver
2012-02-03 1387 56.19 4:16:32 - 4:28:32 Roll Maneuver for VIIRS Lunar Calibration VIIRS Lunar Cal #8a - #1
4:16:32 Maneuver (roll) to -5.4452 deg attitude, 180 seconds
4:19:32 End maneuver; start 4 min dwell
4:21:32 Center of Dwell - Targeted roll angle time
4:23:32 Maneuver to Nadir attitude
4:28:32 End Maneuver
2012-01-30 18:48:37-19:01:57 NPP Collision Avoidance Maneuver NPP Collision Avoidance Maneuver
RMM#1?: 18:48:37-19:01:57
 Corrupt L1B geolocation: 18:48 - 19:00 (inclusive)
2012-01-17 19:33:06-19:46:21 Station-Keeping Maneuver Station-Keeping Maneuver
(DMU): 19:33:06-19:46:21
 Corrupt L1B geolocation: 19:30-19:42 (inclusive).
2012-01-12 12:03:23-12:34:19 Roll Maneuver for ATMS Calibration Roll Maneuver for ATMS Calibration: Roll
slew: 12:03:23 --12:34:19
 Failed Granules: 12:06, 12:12, 12:18, 12:24, 12:30
2012-01-12 13:49:53-14:11:50 Roll Maneuver for ATMS Calibration Roll Maneuver for ATMS Calibration
slew: 13:49:53-14:11:50; slew only
 Failed Granules: 13:48, 13:54, 14:00
2012-01-04 964 55.41 8:43:53 - 8:55:53 Roll Maneuver for VIIRS Lunar Calibration January Lunar Roll Maneuver
8:43:53 Maneuver (Roll) to -9.488 deg attitude, 180 seconds
8:46:53 End maneuver; Start 4 min dwell
8:48:53 Center of Dwell - Targetted roll angle time
8:50:53 Maneuver to Nadir attitude, 300 seconds
8:55:53 End maneuver
 To be investigated
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Science Team - SCFs
Land Surface Reflectance
Snow Cover & Sea Ice
Land Surface Temperature
Land Cover Type and Change
Vegetation Indices
Active Fire and Burned Area Products
LAI and FPAR
Net Vegetation Production
BRDF/Albedo
Vegetation Continuous Fields
Data Centers
The Level-1 and Atmosphere Archive & Distribution System
EROS Center
Goddard Earth Sciences Data & Information Services Center
Land Processes DAAC
Langley Atmospheric Sciences DAAC
ORNL DAAC for Biogeochemical Dynamics
National Snow and Ice Data Center DAAC (NSIDC-DAAC)
Ocean Biology Distributed Active Archive Center (OB.DAAC)
LANCE Near Real Time Data
MODAPS
Discipline Teams
MODIS and VIIRS Land Team
Atmosphere Team
Ocean Team
Calibration Team
Missions
Terra
Aqua
Suomi NPP
JPSS-1/N20