NUCAPS/NOAA 20 Global Granules Composite Images

ATOVS Products Termination
All the Advanced TIROS Operational Vertical Sounder (ATOVS) systems and data products are scheduled to be terminated at the end of this 2022 calendar year. Please let us know if you have any questions or concerns regarding this ATOVS termination.

Metop-A IASI Termination
The IASI instrument on Metop-A (M2) ended operations early October 15, 2021. IASI data and products from Metop-A will no longer update. This is the first step in the planned retirement of the Metop-A satellite on November 15, 2021.

IASI products from other Metop satellites are unaffected.

NOTICES
All the trace gases products derived from the Infrared Atmospheric Sounding Interferometer (IASI) and the NOAA Unique Combined Atmospheric Processing System (NUCAPS) are not validated yet by the science community and users should use them with precaution and at their own risks. These products will be updated soon after a through science validation. NUCAPS Data Impacted: NOAA-20 CrIS Sensor Data Records (SDR) and Outgoing Longwave Radiation (OLR) Date/Time of Initial Impact: Feb 15, 2022 2010Z Date/Time of Expected End: TBD Details/Specifics of Change: NOAA-20 CrIS sensor is having an anomaly that flags the valid data as degraded data due to the failure of a temperature sensor. The issue is caused by an intermittent electrical failure. Due to this anomaly the Quality Flags (QFs) included in the SDR BUFR data and OLR quality flags should be ignored. Investigation of the problem has been initiated and a short-term solution proposed by the SDR science team to fix this problem is to update the engineering packet to open the limits and prevent the flag from being set. Users will be notified when the fix will be implemented in the ESPC operation.

NOTICES

All the trace gases products derived from the Infrared Atmospheric Sounding Interferometer (IASI) and the NOAA Unique Combined Atmospheric Processing System (NUCAPS) are not validated yet by the science community and users should use them with precaution and at their own risks. These products will be updated soon after a through science validation.
NUCAPS Data Impacted: NOAA-20 CrIS Sensor Data Records (SDR) and Outgoing Longwave Radiation (OLR)
Date/Time of Initial Impact: Feb 15, 2022 2010Z
Date/Time of Expected End: TBD
Details/Specifics of Change: NOAA-20 CrIS sensor is having an anomaly that flags the valid data as degraded data due to the failure of a temperature sensor. The issue is caused by an intermittent electrical failure. Due to this anomaly the Quality Flags (QFs) included in the SDR BUFR data and OLR quality flags should be ignored. Investigation of the problem has been initiated and a short-term solution proposed by the SDR science team to fix this problem is to update the engineering packet to open the limits and prevent the flag from being set. Users will be notified when the fix will be implemented in the ESPC operation.

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