Talk:GEOS-5 ADAS Radiance Monitoring: Difference between revisions
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== NOAA-20 Rephasing Maneuver Burn == | == NOAA-20 Rephasing Maneuver Burn == | ||
* On March 20 17:20:45 to 17:23:56 NOAA-20 17:20:45 to 17:23:56performed a sequence of propulsive maneuvers as part of an orbit rephasing effort to provide 180 degree separation between NOAA-20 and NOAA-21. NOAA-20 was back in mission point at 17:40:34 UTC and drifted at a lower altitude, maintained until it is 180 degrees to NOAA-21. Rephasing NOAA-20 took approximately 15 days. During this time, NOAA-20 did not meet its orbit requirements and users should exercise caution when using the NOAA-20 science data. Any use of this data is undertaken at the user's own risk. During this period NOAA-20 ATMS and CrIS were turned off in FP. On April 04, 2024 11:56:00Z, NOAA-20 performed` a 110 second propulsive Re-Phasing Maneuver (RPH) to re-establish mission orbit. [https://www.ospo.noaa.gov/data/messages/2024/04/MSG_20240404_1604.html NESDIS satellite message] | * On March 20 17:20:45 to 17:23:56 NOAA-20 17:20:45 to 17:23:56performed a sequence of propulsive maneuvers as part of an orbit rephasing effort to provide 180 degree separation between NOAA-20 and NOAA-21. NOAA-20 was back in mission point at 17:40:34 UTC and drifted at a lower altitude, maintained until it is 180 degrees to NOAA-21. Rephasing NOAA-20 took approximately 15 days. During this time, NOAA-20 did not meet its orbit requirements and users should exercise caution when using the NOAA-20 science data. Any use of this data is undertaken at the user's own risk. During this period NOAA-20 ATMS and CrIS were turned off in FP. On April 04, 2024 11:56:00Z, NOAA-20 performed` a 110 second propulsive Re-Phasing Maneuver (RPH) to re-establish mission orbit. [https://www.ospo.noaa.gov/data/messages/2024/04/MSG_20240404_1604.html NESDIS satellite message] | ||
== SNPP GPS geolocation problem == | |||
* Starting on May 25 at ~22:30 UTC, the GPS on the S-NPP spacecraft toggled to invalid causing the geolocation of all observed data to be inaccurate and out of the mission specifications. Initially degradation was seen in VIIRS and science products were disabled at 17:00 UTC on May 28, 2024. S-NPP OMPS Limb Profile (LP) products disabled at 21:00 UTC on May 29th, 2024. Later due to increased degradation seen in all S-NPP science products, all S-NPP science products were disabled on PDA OPS at 16:00 UTC on May 30, 2024. [https://www.ospo.noaa.gov/data/messages/2024/05/MSG_20240530_1610.html NESDIS satellite message] | |||