Detailed Description

Color Key Case pending Case closed Case reopened QA note
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Case #:PM_NPP_L1B_22207_NRT   Opening date: 07/27/22   Last update: 08/11/22
Status: Pending
The SNPP spacecraft entered non-nominal state on 07/26/2022 (2022.207) at 16:24:49 UTC, after which all SMD and telemetry data was inaccessible. The root cause continues to be investigated, subsequent contacts have confirmed that the spacecraft and all instruments, including VIIRS, are currently in a safe mode state. Engineering will continue to restore all instruments and science data to an operational state once a plan forward has been determined. All missed data will not be recoverable. The global browse images below show the NRT L1B daytime reflectance I bands and nighttime emissive band M13 for SNPP VIIRS DOY 2022.207 (07.26.22). The data gap from this event is observed over the western hemisphere during the day and eastern hemisphere during the night orbits. The data loss from this event will not be recoverable, and this note will be updated with the details of the data loss when more information becomes available. Impacts to the operational products can be found here.




VNP02IMG-D, DOY A2022207 (2022-07-26)
NRT3 Global Browse Image
Daytime


VNP02MOD-M13-N, DOY A2022207 (2022-07-26)
NRT3 Global Browse Image
Nighttime



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VIIRS SAFE Mode: UPDATE 08.11.22

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The S-NPP High Rate Data downlink was activated on August 11, 2022, at 14:35 UTC. LandSIPS and LANCE have started receiving SNPP VIIRS science data since around 15:48 UTC yesterday, August 10, but all product distribution will remain suspended till instrument status and product quality have been confirmed by the Cal/Val, QA and the respective science teams.


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VIIRS SAFE Mode: UPDATE 08.10.22

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Update #10: Instrument heater activation activities were completed on Monday, August 8. Instrument power-on activities started today, Tuesday, August 9 and will continue through tomorrow, Wednesday, August 10. The earliest the instrument activation process for science data could start is Wednesday, August 10. The process will be sequential and is expected to occur in the order of ATMS, VIIRS, OMPS, CERES, and CrIS. After all of the instruments are activated then the HRD transmitter will be powered on. However, the science data will not be cleared for operational use until the Sensor Data Record (SDR) and Environmental Data Record (EDR) product Cal/Val teams check each S-NPP product. Science data from Interface Data Processing Segment (IDPS) will be available on Government Resource for Algorithm Verification, Independent Test, and Evaluation (GRAVITE) for the Cal/Val teams and NDE I&T for the Product Area Leads (PAL), and will be archived in Comprehensive Large Array-data Stewardship System (CLASS). Full product recovery is expected to require approximately 2-3 weeks after the instruments start providing science data. Product Distribution and Access (PDA) OPS subscriptions for all S-NPP products have been disabled. S-NPP product subscriptions will be activated for distribution through PDA OPS after each product is cleared for operations by the product recovery team. Users who have any questions may directly contact OSPO's JPSS Data Operations Manager at james.mcnitt@noaa.gov and include the ESPC Help Desk on the cc line (ESPCOperations@noaa.gov).


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VIIRS SAFE Mode: UPDATE 08.09.22

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Starting on 08/09, NOAA plans to begin sequential instrument activation which is expected to continue through August 12th. Detailed information is not yet available on the sequence for when instruments will be activated. We will continue to post information on this as it becomes available.

Once the instruments are activated, the data will be sent to the cal/val team for analysis/evaluation. This is tentatively planned to start sometime between 8/15 to 8/19/22 and expected to last for a few weeks. Data will not be released to the externals until the cal/val team has approved the data.

During an SNPP anomaly last year, EDOS received the science data immediately upon instrument activation. IF instrument activation begins on 08.09.22, the SIPS might start receiving data. Please be aware that this data is still under review and NOAA has NOT completed their evaluation and has NOT yet released it for science use. Users should be aware that data processed and forwarded to the DAACs in the coming days will not be of science quality. Users may not receive science quality SNPP data for a few more weeks as the sequence of events unfolds.

This note will continue to be updated with the latest event details. It will also define the outage period with the start date / time of good quality SNPP data for science use.


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VIIRS SAFE Mode: UPDATE 08.03.22

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Update #9: All instruments have been offline since Friday, July 29, 2022. Instrument heater activation activities started today, Aug 3, 2022, and will continue throughout the week. The instrument activation sequence is tentatively planned to start next week (August 8-12) and the data product evaluation process is tentatively planned to start during the week of August 15-19. The High Rate Data (HRD) transmitter is powered off. Users who have any questions may directly contact OSPO's JPSS Data Operations Manager at james.mcnitt@noaa.gov and include the ESPC Help Desk on the cc line (ESPCOperations@noaa.gov).


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VIIRS SAFE Mode: UPDATE 08.01.22

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Update #8: S-NPP transitioned to Mission Point mode on Friday, July 29, 2022. The S-NPP HRD transmitter was powered off on July 29, 2022 at 16:04 UTC. Engineering continues to troubleshoot.


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VIIRS SAFE Mode: UPDATE 07.28.22

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As of 1730 UTC (July 28, 2022), efforts are still underway to investigate the S-NPP anomaly and prepare a plan to return the S-NPP spacecraft back to nominal status. These efforts are expected to continue into next week. S-NPP is currently in sun point (sun-safe) mode and all instruments are in a safe state. Although the HRD transmitter remains on, Direct Broadcast (DB) users are advised that science data is not available. All missed data will not be recoverable. No data is available starting at 16:09 UTC, July 26, 2022.




Occurrence: NRT3, and all downstream products during the specified time periods.
PGE:


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