NPP Maneuver List
2018-01-03

DateOrbitPhase AngleManeuver Time
(UTC)
VIIRS SDR/EDR Team Blog NoticeEvent TimelineGeolocation error
02/28/2018 (2018059) 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
12/29/2017 (2017363) 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
10/31/2017 (2017304) 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
09/28/2017 (2017271) 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
Yes
07/19/2017 (2017200) 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
06/04/2017 (2017155) -1.243 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
05/06/2017 (2017126) -3.311 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
Yes
04/06/2017 (2017096) -2.6382 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
03/28/2017 (2017087) 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
03/08/2017 (2017067) -1.8989 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
02/07/2017 (2017038) -3.794 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
01/08/2017 (2017008) -5.5713 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
12/10/2016 (2016345) -7.6607 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
11/10/2016 (2016315) -3.7351 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
09/29/2016 (2016273) 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
Yes
06/15/2016 (2016167) 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
05/17/2016 (2016138) -2.6395 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
04/17/2016 (2016108) -3.6343 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
03/24/2016 (2016084) 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
03/18/2016 (2016078) -2.8601 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
02/24/2016 (2016055) 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
02/18/2016 (2016049) -3.3312 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.
01/19/2016 (2016019) -5.3022 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).
12/21/2015 (2015355) 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
11/22/2015 (2015326) 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
11/05/2015 (2015309) 23:40:00 - 23:53:01 Collision avoidance maneuver 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
10/23/2015 (2015296) 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)
09/23/2015 16:47 - 19:03 UTC Out-of-Plane maneuver 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
06/27/2015 14:14:39 - 14:19:42 UTC Lunar Calibration 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
05/29/2015 18569 -2.306 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).
04/30/2015     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.
 
04/29/2015 18148 -4.701 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).
   
03/30/2015 17724 -5.238 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).
   
03/01/2015 17303 -4.048 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
Yes
02/04/2015 (2015035)     17:33:59 - 19:41:01 UTC Drag Make-Up Maneuver 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.
 
01/30/2015 (2015030) 16882 -5.674 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
 
12/31/2014 (2014365)     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
 
12/02/2014 (2014336) 16046 -10.8411 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).
 
11/12/2014 (2014316)     16:54 - 19:10 UTC Out-of-Plane maneuver 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
Yes
11/03/2014 (2014307)     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
10/30/2014 (2014303)     16:12:59-18:20:01 UTC Drag Make-Up Maneuver 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.
Yes
10/15/2014 (2014288)     17:21:46 UTC - 18:10:14 UTC Out-of-plane Maneuver 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
 
09/29/2014 (2014272)     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
Yes
9/10/2014
(2014253)
    18:21:35 - 19:09:12 Out-of-Plane Maneuver 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

 
07/30/2014 (2014211)     21:54:20 UTC - 22:19:28 UTC Lunar Calibration 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
Yes
06/09/2014 (2014160)   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
 
05/10/2014
(2014130)
 -4.17812:48:00 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
 
04/10/2014
(2014100)
 -4.97620:28:16 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
Yes
03/12/2014
(2014071)
 -3.94500:46:43-01:48:43 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
 
03/04/2014
(2014063)
    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
02/20/2014
(2014051)
   18:15:34-18:59:19 Pitch Back Flip
02/10/2014
(2014041)
   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).
01/21/2014
(2014021)
  2014-01-21 20:48:20 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.
01/11/2014
(2014011)
 -6.7282014-01-11T09:59:45 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
 
12/12/2013
(2013346)
 -9.44019:35:46-21:23:46 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
11/13/2013
(2013317)
10597-7.98086:52:11 - 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)
 
10/14/2013
(2013287)
  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
 
07/16/2013
(2013197)
  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
 
05/21/2013
(2013141)
8101 50.67 N/A 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)
 
4/21/2013
(2013111)
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
Data outage
03/23/2013
(2013082)
  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
 
2/21/2013
(2013052)
683850.719:28:25 - 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)
 
1/22/2013
(2013022)
641450.8112:08:35 - 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)
 
12/23/2012
(2012358)
599050.9014:55:50 - 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)
 
11/23/2012
(2012328)
556950.7421:13:20 - 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)
 
10/25/2012
(2012299)
514951.0206:53:15 - 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)
 
5/31/2012
(2012152)
3068 52.97 N/A 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.
5/2/2012
(2012123)
265450.9210:15:06 - 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)
 
4/2/2012
(2012093)
223551.2423:00:11 - 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)
 
3/3/2012
(2012063)
1810N/A23:34:14 - 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.
 
2/3/2012
(2012034)
138855.385:58:34 - 6:10:34N/A 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
Yes
2/3/2012
(2012034)
138756.194:16:32 - 4:28:32N/A 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
 
1/4/2012
(2012004)
96455.418:43:53 - 8:55:53N/AJanuary 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