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NumberEventStart TimeEnd TimeDay of Year
1VIIRS Lunar Roll Maneuver Completed Successfully: Lunar Roll Maneuver was successfully completed at 0856Z, 4 January. Note that the S/C was off-nadir for 12 minutes. 2012-01-04 08:43:002012-01-04 08:56:043
2VIIRS Lunar Rolls Completed Last Week – Maneuvers were completed on February 3rd at 04:16z and 05:58z. Rolls worked as-predicted and data has been provided to support trending of the responsivity degradation in the VIIRS Vis/NIR/SWIR bands.2012-02-03 00:00:002012-02-03 00:00:0333
3NPP Roll Maneuver (With Sector Rotation)2012-03-03 23:34:002012-03-03 23:48:00063
4Roll maneuver , orbit 2235, VIIRS was carrying out a sector rotation (encoder offset) activity. Moon at 23:05:11z (22:59-23:13z)2012-04-02 22:59:002012-04-02 23:13:0292
5Monthly VIIRS Lunar Roll Maneuver Completed Wednesday, 5/2: The 12 minutes roll maneuver was completed form 10:15:06 to 10:27:06 GMT. SDRs and EDRs from 10:14:36 to 10:27:37 GMT were impacted by this activity.2012-05-02 10:15:002012-05-02 10:27:02122
6NPP Lunar Cal. (No Roll, with Sector Rotation)2012-05-31 14:42:002012-05-31 14:55:31151
7Sector rotation, test encoder offset, orbit 1663. This test was conducted in preparation for the upcoming Lunar Roll maneuver to allow the EV sector to cover the Space View door2012-02-22 00:00:0053
8S-NPP Lunar Roll Maneuver and VIIRS sector rotation 1/11/14 orbit 114352014-01-11 09:54:152014-01-11 10:07:1610
9The S-NPP is scheduled to perform a roll maneuver on April 10 for VIIRS lunar calibration in orbit# 12704 with VIIRS sector rotation to allow the Moon image to be captured in the middle of Earth view sector (target time 20:53:17z).2014-04-10 20:47:462014-04-10 21:00:4799
10NPP Lunar Roll Maneuver and VIIRS sector rotation 12/23 orbit 59902012-12-23 14:55:202012-12-23 15:08:21357
11NPP Lunar Roll Maneuver and VIIRS sector rotation 4/21/2013 orbit 7682 from 19:42:24 to 19:55:25z.2013-04-21 19:42:242013-04-21 19:55:21110
12S-NPP Lunar Roll Maneuver and VIIRS sector rotation. The S-NPP is scheduled to perform a roll maneuver (-7.9808 deg) on November 13 for VIIRS lunar calibration in orbit 10597 with VIIRS sector rotation.2013-11-13 06:52:112013-11-13 07:05:13316
13The S-NPP is scheduled to perform a roll maneuver (-9.44 deg) on December 12 for VIIRS lunar calibration in orbit# 11015 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector.2013-12-12 19:30:162013-12-12 19:43:12345
14The NPP is scheduled to perform a roll maneuver (-1.305 deg) on October 14 for VIIRS lunar calibration in orbit 10180 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector.2013-10-14 21:35:492013-10-14 21:42:14286
15The NPP is scheduled to perform a roll maneuver (-3.3196 deg) on March 23rd for VIIRS lunar calibration in orbit 7260 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector.2013-03-23 03:23:302013-03-23 03:36:2381
16NPP Lunar Roll Maneuver and VIIRS sector rotation Completed.2013-05-21 08:38:002013-05-21 08:51:00364
17Monthly VIIRS Lunar Roll Completed on February 21, 2013 @ 09:30 GMT: Please note the following impacts to instrument modes and data products: 09:08:25 GMT - 11:15:25 GMT,CERES in Contam-Safe 09:23:25 GMT - 09:39:25 GMT, HRD off 09:27:55 GMT - 09:34:56 GMT2013-02-21 09:27:002013-02-21 09:37:0051
18SNPP VIIRS Lunar Roll - January 22 at 12:13 GMT: SNPP performed a spacecraft attitude maneuver for VIIRS Lunar Calibration. Maneuver consisted of a roll of -3.3826 degrees, centered at 1/22/13 at 12:13:35 GMT. Please note the following changes associated 2013-01-22 12:08:052013-01-22 12:21:0621
19VIIRS Lunar Roll Maneuver Completed Successfully on Friday, November 23: SDRs/EDRs impacted by this activity from 21:12:50 to 21:25:51z (sector rotation). 12 minutes pointing off nadir from 21:13:20 to 21:25:20z (maneuver). Data analysis from this activit2012-11-23 21:12:502012-11-23 21:25:51327
20The NPP is scheduled to perform a roll maneuver (-3.714 deg) on Feb. 10 for VIIRS lunar calibration in orbit# 11858 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector (target time 5:34:12)2014-02-10 05:28:422014-02-10 05:41:4340
21The S-NPP is scheduled to perform a roll maneuver (-3.945 deg) for VIIRS lunar calibration in orbit# 12281 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector (target time 1:11:43z) .2014-03-12 01:06:132014-03-12 01:19:1470
22VIIRS Lunar Roll Maneuver Completed.2012-10-25 06:53:002012-10-25 07:06:00364
23The S-NPP is scheduled to perform a roll maneuver (-4.178 deg) on May 10 for VIIRS lunar calibration in orbit# 13126 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector(target time 13:13:002014-05-10 13:07:302014-05-10 13:20:31129
24The S-NPP VIIRS is scheduled to perform sector rotation for lunar observation in the orbit# 13546 on June 9 to allow the Moon image to be captured in the middle of Earth data sector (target time at 3:48:42z). A roll maneuver is not required this time. During the sector rotation, the VIIRS on-board 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. 4 and a half min VIIRS SDRs/EDRs impacted period: 3:46:27 to 3:50:58z (sector rotation and HG).2014-06-09 03:46:272014-06-09 03:50:58159
25SBC lockup. On 2014-09-26 approximately 16:21:24 UTC VIIRS stopped outputting science data. At 16:41:07 UTC (AOS SVL 15100) controllers reported multiple VIIRS and 1394 bus alarms to engineers. During the back orbit engineering verified the state of the VIIRS instrument and began preparations for recovery. The VIIRS Single Board Computer (SBC) Lock-up recovery is being executed during SVL 15101-15104. During SVL 15101 (18:24:35 - 18:35:07 UTC) VIIRS was power-cycled and science data resumed at approximately 18:35 UTC but may be degraded for multiple orbits. All VIIRS DNB data will be degraded prior to SVL 15104 when the VIIRS DNB tables are expected loaded.2014-09-26 16:21:242014-09-26 23:44:36268
26The S-NPP is scheduled to perform a roll maneuver (-8.982 deg) on Dec 31 for VIIRS lunar calibration in orbit# 16463 with VIIRS sector rotation (encoder offset) to allow the Moon image to be captured in the middle of Earth view sector (target time 19:38:08z). 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: 19:32:38 - 19:45:39z (sector rotation and HG). 12 min geolocation pointing off nadir: 19:33:08 - 19:45:08z (maneuver).2014-12-31 19:32:382014-12-31 19:45:39364
27The S-NPP is scheduled to perform a roll maneuver (-5.674 deg) on Jan 30, 2015 for VIIRS lunar calibration in orbit# 16882 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 8:22:14z. 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. The dual gain bands gain mode will be switched from Auto Gain to fixed High Gain (HG). 13 min VIIRS SDRs/EDRs impacted period: 8:16:44 - 8:29:45z (sector rotation and HG). 12 min geolocation pointing off nadir: 8:17:14 - 8:29:14z (maneuver).2015-01-30 08:16:442015-01-30 08:29:4529
28The 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).2015-03-01 00:28:522015-03-01 00:41:5359
29The 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).2015-03-30 16:43:372015-03-30 16:56:3888
30The 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).2015-05-29 04:43:402015-05-29 04:50:41148
31The S-NPP VIIRS is scheduled to perform sector rotation for lunar observation in the orbit# 18986 on June 27, 2015. A roll maneuver is not required this time. The lunar observation is centered at 14:17:10z. 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). 5 minutes VIIRS SDRs/EDRs impacted period: 14:14:39 to 14:19:42z (sector rotation and HG).2015-06-27 14:14:392015-06-27 14:19:42177
32The S-NPP is scheduled to perform a roll maneuver (-1.668 deg) on Oct 23, 2015 for VIIRS lunar calibration in orbit# 20663 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 19:02:24z. 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: 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).2015-10-23 18:58:542015-10-23 19:05:55295
33The S-NPP is scheduled to perform a roll maneuver (-7.1705 deg) on Nov 22, 2015 for VIIRS lunar calibration in orbit# 21080 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 04:20:25z. 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: 04:14:55 - 04:27:56z (sector rotation and HG). 12 min S-NPP spacecraft pointing off nadir: 04:15:25 - 04:27:25z (maneuver).2015-11-22 04:14:552015-11-22 04:27:56325
34The S-NPP is scheduled to perform a roll maneuver (-8.176 deg) on Dec 21, 2015 for VIIRS lunar calibration in orbit# 21496 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 13:35:44z. 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: 13:30:14 - 13:43:15z (sector rotation and HG). 12 min S-NPP spacecraft pointing off nadir: 13:30:44 - 13:42:44z (maneuver).2015-12-21 13:30:142015-12-21 13:43:15354
35The 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).2016-01-19 22:49:152016-01-19 23:02:1618
36The S-NPP is scheduled to perform a roll maneuver (-3.3312 deg) on Feb 18, 2016 for VIIRS lunar calibration in orbit# 22330 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 08:18:15z. 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 will be switched from Auto Gain to fixed High Gain (HG). 13 min VIIRS SDRs/EDRs impacted period: 08:12:45 - 08:25:46z (sector rotation and HG). 12 min S-NPP spacecraft pointing off nadir: 08:13:15 - 08:25:15z (maneuver).2016-02-18 08:12:452016-02-18 08:25:4648
37The S-NPP is scheduled to perform a roll maneuver (-2.8601 deg) on March 18, 2016 for VIIRS lunar calibration in orbit# 22749 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 21:08:23z. 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: 21:02:53 - 21:15:54z (sector rotation and HG). 12 min S-NPP spacecraft pointing off nadir: 21:03:23 - 21:15:23z (maneuver).2016-03-18 21:02:532016-03-18 21:15:5477
38The S-NPP is scheduled to perform a roll maneuver (-3.6343 deg) on April 17, 2016 for VIIRS lunar calibration in orbit# 23169 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 11:43:12z. 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: 11:37:42 - 11:50:43z (sector rotation and HG). 12 min S-NPP spacecraft pointing off nadir: 11:38:12 - 11:50:12z (maneuver).2016-04-17 11:37:422016-04-17 11:50:43107
39The S-NPP is scheduled to perform a roll maneuver (-2.6395 deg) on May 17, 2016 for VIIRS lunar calibration in orbit# 23591 with VIIRS sector rotation (encoder offset). The lunar observation is centered at 04:01:05z. 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: 03:55:35 - 04:08:36z (sector rotation and HG). 12 min S-NPP spacecraft pointing off nadir: 03:56:05 - 04:08:05z (maneuver).2016-05-17 03:55:352016-05-17 04:08:36137
40The S-NPP VIIRS is scheduled to perform sector rotation for lunar observation in the orbit# 24011 on June 15, 2016. A roll maneuver is not required this time. The lunar observation is centered at 18:36:12z. 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). 5 minutes VIIRS SDRs/EDRs impacted period: 18:33:41 to 18:38:44z (sector rotation and HG).2016-06-15 18:33:412016-06-15 18:38:44166