S-NPP spacecraft in safe mode (fixed)
| Platform | SNPP |
|---|---|
| Instrument | VIIRS, CrIS |
| Source | LAADS, LANCE |
| Issue | news |
| Last Updated | 2021-08-05 16:00:00 |
| Start | 2021-08-03 12:46:00 |
| End | 2021-08-10 00:00:00 |
| Description |
Updated 2021-08-06:16:00 UTC -- SNPP VIIRS thermal bands are back to normal as of August 5, 10:15 UTC. So, the VIIRS atmosphere products, LANCE and FIRMS Fire products, and other LANCE products should be good from that point on but these products should be used with caution prior to the time the thermal bands were assessed to be back to normal. For more details regarding this you can refer to the LDOPE note posted here. And, for detailed findings from the VIIRS Characterization Support Team (VCST), please refer to their slides. ----------------- Updated 2021-08-05:14:20 UTC -- NASA LANCE NRT and Land SIPS has started generating the S-NPP VIIRS products, post VIIRS recovery on 1600 UTC August 4. However, several of the onboard VIIRS instrumentation is still under QA by the Cal/Val team and especially the cold focal plane temperature (CFPA) affecting the LWIR/SW-MWIR bands may not have reached the optimal temperature yet, following this VIIRS recovery. A final update from the Cal/Val team is expected soon, confirming the final status of the VIIRS instrumentation and the products. Till then, users are urged to maintain caution while using these data. ----------------- Updated 2021-08-04:16:40 UTC -- As of 1600 UTC the VIIRS instrument has been recovered. Please note that VIIRS instrument tuning and product quality checks will take at least 2 days. ----------------- Updated 2021-08-04:15:40 UTC -- S-NPP mission engineering team was able to successfully return the S-NPP spacecraft back to the nominal Mission pointing status at 22:28 UTC (Aug 3, 2021). The instrument recovery efforts commenced at 14:07 UTC Aug 4, 2021. As of 14:17 UTC, ATMS, CERES, and OMPS instruments were recovered. The science data distribution will commence only after all the instruments have been recovered and all instrument operations have been found to be nominal by the respective Cal/Val teams. It is anticipated that by 22:00 UTC Aug 4, that instrument recovery on SNPP should be completed. ----------------- Posted 2021-08-04T12:40 UTC -- Please note that the S-NPP spacecraft is in safe mode and all science data acquisition disabled since 12:46 UTC, August 3 2021. The recovery is expected today at 12:00 UTC, but more word on this is expected. Till then all science data acquisition is disabled. For more details regarding this you can refer to the LDOPE note posted here. |