Maneuver List

SNPP C2 2020 2019 2018 2017 2016 2015 2014 2013 2012
SNPP C1 2020 2019 2018 2017 2016 2015 2014 2013 2012
J1/N20 2020 2019 2018 2017

SNPP 2020

DateOrbitPhase AngleManeuver Time
(UTC)
VIIRS SDR/EDR Team Blog NoticeEvent TimelineGeolocation error
12/25/20 (2020360) 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)
12/10/20 (2020345) 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
16:54 - 17:00 - Corrupt geolocation AS5000 only, OK in C2.
11/25/20 (2020330) 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)
09/24/20 (2020268) 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.
(17:24 - 18:54) inclusive - Corrupt L1b / geolocation AS5000 and AS5110
06/24/20 (2020176) 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
16:42 - Corrupt geolocation AS5000 and AS5110
06/02/20 (2020154) 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
05/03/20 (2020124) 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
18:36 - Corrupt Reflectance data for AS5000 only, AS5110 is OK.
04/04/20 (2020095) 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
10:36 - Corrupt Reflectance data for AS5000 only, AS5110 is OK.
03/05/20 (2020065) 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
02/05/20 (2020036) 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
09:00 and 09:06 - Corrupt Reflectance and BT data for AS5000 only, AS5110 is OK.
01/22/20 (2020022) 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
16:06 and 16:18 - Corrupt geolocation and BT data for AS5000 and 5110.
01/06/20 (2020006) 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
15:12 and 15:18 - not produced / center of Dwell.