Update #1: PDA OPS subscription for all S-NPP OMPS Limb Profile (LP) Products including blended LTOAST products will be disabled at 21:00 UTC on May 29th, 2024.
Users are advised that these S-NPP LIMB products have been degraded since May 25th, 2024.
As S-NPP High Rate data (HRD) remains enabled for OMPS LP products, Direct Broadcast (DB) users are advised that this S-NPP OMPS LP science data is not yet cleared for operational use.
Topic: GPS invalid on S-NPP spacecraft
Date/Time Issued: May 29, 2024 2108Z
Product(s) or Data Impacted: All S-NPP VIIRS Data Products
Date/Time of Initial Impact: May 25, 2024 22:30 UTC
Date/Time of expected end Time: TBD
Duration: TBD
Details: 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. Engineering has started planning the execution of the reset of the GPS unit on the S-NPP spacecraft. The anticipated reset of the GPS unit is expected no earlier than May 29, 2024. All PDA OPS subscriptions for all S-NPP VIIRS science products will be disabled at 17:00 UTC on May 28, 2024.
As S-NPP High Rate data (HRD) remains enabled for all VIIRS products, Direct Broadcast (DB) users are advised that this S-NPP VIIRS science data is not yet cleared for operational use.
The NOAA-21 and NOAA-20 satellites will continue to provide JPSS VIIRS science data as the primary and secondary satellites, respectively.
Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880
Web Site(s) for applicable information: N/A
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