Talk:GEOS-5 ADAS Radiance Monitoring: Difference between revisions

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 * NCEP implemented v3.8.3 of their obsproc_satingest package on 17 Sep 1400UTC.  AMSU-A and MHS data from MetOp-C, and GOES-17 satellite winds are available starting with the 12z files.
 * '''10 June 2021''' - It does not look like the start of MetOp-C AVHRR was recorded.  The data starts 9 Dec 2019 18z, in association with RFC 6290 obsproc_satingest.v3.9.0.
+* Note: the GOES-17 data was present only for a couple of synoptic times - satellite problems were still being resolved.  The data started (again) 07 November 2019 06z.
 == MetOp-A IASI data problem 21 Aug - 23 Sep 2019 ==
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 == Change in N20 CrIS-FSR - reduced acceptance rates in some channels ==
-* Monitoring personnel noticed a drop in the number of accepted data for some channels in early June.  The change occurred on June 17.  The satellite messages and instrument noise levels were checked but there was no indication of what had caused the change.  The accepted rate for some corresponding channels increased for the NCEP assimilation (per their monitoring plots). We are keeping an eye on this instrument.
+* Monitoring personnel noticed a drop in the number of accepted data for some channels in early June.  The change occurred on June 17 2020.  The satellite messages and instrument noise levels were checked but there was no indication of what had caused the change.  The accepted rate for some corresponding channels increased for the NCEP assimilation (per their monitoring plots). We are keeping an eye on this instrument.
 == AQUA data outage from August 16, 2020==
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 * Due to the Constellation Exit Maneuver on October 12 and 19 all science products from observations onboard Terra satellite will be unavailable starting October 10 till October 19.  Products after the maneuver may be unreliable and will be checked by the cal/val team.
 * This outage impacted MODIS AMVs and aerosols.  MODIS Terra AMVs were turned off in f5294_fp as of 2022/10/10.  The Terra winds resumed in the SATWND input files on 10/28 12z.
+== New version of EUMETSAT AVHRR AMVs ==
+* EUMETSAT updated AMV processing for AVHRR.  The old processing winds ended after 20221103/00z.
+* The new AVHRR AMVs start 20221130/12z in our data stream.  The current FP does not include code for processing the new format winds; code modifications to process the new format data will be incorporated in a future version of FP.
 == GOES-18 replaces GOES-17 as operational GOES West ==
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 * From [https://www.ospo.noaa.gov/data/messages/2023/06/MSG_20230612_1455.html] due to a Metop-B MHS Instrument anomaly investigation and testing there will be a data outage from 13th June 07:11 UTC until further notice.
 * '''12 June 2023''' While the bias correction in the forward processing appeared to adjust to the change in the instrument, due to the increased noise and the later outage for testing the MetOp-B MHS is being turned off in MERRA2 from 6/3/2023 until the issue is resolved.
+* '''23 June 2023''' The noise level dropped to normal range for ch3 and ch4 after the return of Metop-B MHS data although there were no announcements about the state of the instrument.  The instrument will be turned back on in DAS runs as of 00UTC 29 June, after the McMurdo Maintenance period on 28 Jun.
+== CrIS-FSR SNPP Long Wave Signal Processor Failure ==
+* JPSS S-NPP CrIS (Cross Track Infrared Sounder) experienced a Long Wave Signal Processor Failure on August 13, 2023 at approximately 21:32 UTC.  Engineering is investigating the cause of the CrIS LWIR failure.  The overall health and safety of S-NPP Spacecraft Bus and the remaining instruments on board are nominal.
+* Update from the CrIS L1B science team (July 20, 2023): This has been diagnosed as an issue with the temperature sensor or readout circuitry and the actual Scene Select Module (SSM) baffle temperature remains nominal. At the time of the anomaly the measured SSM scan baffle temperature data dropped to a fixed and unrepresentative value of 250.1K, where it has remained since that time. The measured value of the SSM scan baffle temperature is used in the Internal Calibration Target (ICT) radiometric model and the polarization correction. The faulty temperature reading results in a cold radiometric bias in the SNPP CrIS calibrated radiances with an estimated magnitude of approximately 0.1 K in the LWIR band and 0.2 K in the SWIR band. Quality flags indicate invalid data for both bands. A solution has been developed and tested to address the issue and significantly reduce cold radiometric bias in the calibrated radiances. This issue will be addressed an upcoming patch for the Version 3 SNPPCrISL1B and SNPPCrISL1BNSR products.
+* Note that SNPP CrIS is now operating in MW+SW mode. There will no longer be LW data available from SNPP CrIS, since both LW signal processors have failed.
+As of Friday September 8, 2023, all CrIS SDR and BUFR products are approved for operational use and NDE/PDA subscriptions for those products were enabled at 15:30 UTC, September 8, 2023. Direct Broadcast (DB) users can use the equivalent CSPP LEO products for operations.
+As a reminder, the Long Wave band data will no longer be available from the S-NPP CrIS instrument.
+This completes the S-NPP CrIS side-1 to side-2 swap anomaly recovery.
+== Transitioning off the existing NOAA POES Ground System to a Commercial Ground System service ==
+*  On September 11, 2023 at 16:20 UTC during rev 94379 the NOAA-18 satellite will be fully transitioned to Parsons (Command and Control) C2 Commercial Ground Services. This first transition of a POES satellite is an ongoing effort to extend the utility of the legacy POES satellite constellation by extending life through use of a commercial system called Ground Station as a Service (GSaaS) approach.  The data and products from NOAA-18 will not be distributed while  data quality evaluations are ongoing.   Direct readout data from NOAA-18 will continue to be made available to those users of that service.
+*  The other satellites (NOAA-15, NOAA-19) have also experienced briefer data losses in late September and early October due to supporting POES EL (Extended Life) ground system testing.
+== MetOp-C AMSU-A increased noise level ch 4 ==
+* Noise levels for MetOp-C AMSU-A channel have been increasing with an accelerated rate since mid-2022.  In early October 2023 the number of rejected data for the channel increased significantly, with an increased number of missing values starting around 7 Oct 2023.  The rejected data increased until nearly all of the radiances for channel 4 in the operational stream were missing by 20 Oct. The missing radiances for channel 4 led to rejection of other channels (ch 5, 6) on the instrument.
+* Due to the large number of rejections, Channels 4,5, and 6 were turned off in FP and in GEOSIT as of 20231020 12UTC.   Shortly after that date (24 Oct) the radiance processing was modified and channel 4 data resumed (albeit noisy).  Ch 4,5,6 remain turned off for MetOp-C AMSUA.
+== ESPC Legacy Products Retirement of MODIS Winds ==
+*'''30 Jan 2024''' MODIS wind processing ended January 29 2024.  [https://www.ospo.noaa.gov/data/messages/2024/01/MSG_20240129_1910.html NESDIS satellite message] The last date with MODIS winds was 2024/01/29 12z.
+== ESPC Legacy Products Retirement of AVHRR Cloud Drift Polar Winds (NOAA 15/18/19) ==
+* Processing of AVHRR Cloud Drift Polar Winds ended on April 3, 2024. [https://www.ospo.noaa.gov/data/messages/2024/03/MSG_20240326_2007.html NESDIS satellite message] The last date with the AVHRR winds from NOAA satellites was 2024/04/03 12z.
+== 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]
+== SNPP GPS geolocation problem May 25 2024. July 24 2024, Sep 24 2024, Nov 2 2024==
+* 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].
+* Recovery efforts on the SNPP GPS unit were carried out and completed June 3 and the Cal/Val team confirmed that the GPS results are valid.  Science data after 18:00 UTC June 4, 2024 will meet mission specifications.  [https://www.ospo.noaa.gov/data/messages/2024/06/MSG_20240604_1805.html NESDIS satellite message]
+* There was another outage of SNPP instruments starting 24 July 2024.  SNPP went into SAFE HOLD.  Originally this was said to be due to a Command Data Processor  (CDP) reset at 05:28 UTC 7/24 but then the message was corrected to say there were geolocation errors.  Spacecraft recovery efforts were carried out and various instruments were placed in operational mode, but the data was held back from science customers until approved by the Cal/Val team.  Data was unavailable in our input stream until 18z 7/30 2024. [https://www.ospo.noaa.gov/data/messages/2024/08/MSG_20240809_1426.html NESDIS satellite message]
+* Once again the geolocation for the S-NPP spacecraft entered a degraded state starting with the observation time of 22:44:05z on September 24, 2024.  Operations was able to recover the S-NPP spacecraft to a valid geolocation state at 16:34 UTC on September 27, 2024. Cal/Val teams have confirmed that all S-NPP Science products are meeting mission specifications and ready for operational use.  Science data were enabled at 19:30 UTC.  [https://www.ospo.noaa.gov/data/messages/2024/09/MSG_20240930_1920.html NESDIS satellite message]
+* Another geolocation failure was reported beginning Nov 2 2024 2215UTC.  Operations recovered the S-NPP spacecraft to a valid geolocation state at ~17:20 UTC on November 6, 2024. S-NPP Science products were enabled at 16:30 UTC on November 8, 2024. [https://www.ospo.noaa.gov/data/messages/2024/11/MSG_20241108_1653.html NESDIS link]
+== NOAA-21 geolocation problem ==
+* Starting on July 20 at ~06:18 UTC, the geolocation of the NOAA-21 spacecraft entered a degraded state causing the data to be inaccurate and out of mission specifications.  Operations was able to recover the NOAA-21 spacecraft to a valid Geolocation state on July 20, 2024.  [https://www.ospo.noaa.gov/data/messages/2024/07/MSG_20240720_2002.html A bulletin] issued 2002UTC stated the Cal/Val temas had confirmed the NOAA-21 Science products are ready for operational use.
+== AIRS Aqua outage 26-27 July 2024 ==
+* AIRS data was unavailable in FP from 00z 26 July to its restart at 18z 27 July due to a scheduled calibration test.
+== S-NPP ATMS in Safe Hold 19 Nov 2024 ==
+* Beginning November 6, 2024, the S-NPP ATMS telemetry showed elevated temperatures, currents, and voltages from the scan drive compensator motor. The OSPO JPSS Engineering team is in the process of diagnosing the issue and preparing mitigation measures. The ATMS instrument was placed into Safe Hold to prevent possible damage to the instrument scan drive compensator motor function.  The ATMS instrument on the S-NPP satellite was placed in Safe Hold at 1630 Z on November 19, 2024 and will be offline until further notice.  [https://www.ospo.noaa.gov/data/messages/2024/11/MSG_20241119_1932.html NESDIS Link]
+* S-NPP ATMS data returned to our input data stream as of 18z Jan 31 2025.  The data was made active in FP as of 20250206/12z and will be used in MERRA2 starting 1 Feb.
+== GOES-19 becomes the operational GOES-East satellite 7 April 2025 ==
+* As of April 7, 2025 at 1510 UTC, the GOES-19 satellite has been designated as the Operational GOES-East satellite.  Distribution of GOES-16 data has been discontinued and the satellite is being moved to a storage location at 104.7°W. [https://www.ospo.noaa.gov/data/messages/2025/04/MSG_20250407_1510.html NESDIS message] [https://www.noaa.gov/news-release/noaas-goes-19-satellite-now-operational-providing-critical-new-data-to-forecasters News story]
+* The GOES AMVs were missing on 10 April due to a problem with product delivery.  [https://www.ospo.noaa.gov/data/messages/2025/04/MSG_20250411_1815.html NESDIS message]
+== End of data delivery for POES constellation June 16, 2025 ==
+* NOAA has ended delivery of all data from the POES (Polar Operational Environmental Satellite) constellation (NOAA-15, NOAA-18, and NOAA-19) on June 16, 2025 at 18:00 UTC. [https://www.ospo.noaa.gov/data/messages/2025/06/MSG_20250616_1800.html OSPO message]
+* End of data delivery impacts AMSUA, MHS, and AVHRR on NOAA-15, NOAA-18, and NOAA-19 used by GMAO systems.
+* NOAA decommissioned NOAA-18 on June 6. [https://www.ospo.noaa.gov/data/messages/2025/06/MSG_20250606_1801.html OSPO message]
+* NOAA-19 and NOAA-15 were decommissioned on August 13 and 19, respectively. [https://www.ospo.noaa.gov/data/messages/2025/08/MSG_20250819_1547.html OSPO message]
+== DMSP SSMIS data suspension by 30 June 2025 -- presumed indefinite extension ==
+The Defense Meteorological Satellite Program (DMSP) will discontinue ingest, processing and distribution of all DMSP data, including data from Special Sensor Microwave Imager/Sounder (SSMIS) by 30 June 2025. [https://www.ospo.noaa.gov/data/messages/2025/06/MSG_20250625_1735.html OSPO message]
+UPDATE 1** An update service advisory will be sent and FNMOC now expects to decommission DMSP processing no later than July 31st. [https://www.ospo.noaa.gov/data/messages/2025/06/MSG_20250630_0345.html]
+UPDATE 2** The Fleet Numerical Meteorology and Oceanography Center (FNMOC) has announced plans to continue distribution of Defense Meteorological Satellite Program (DMSP) data beyond July 31, 2025. [https://www.ospo.noaa.gov/data/messages/2025/07/MSG_20250730_0015.html]