Topic: NOAA-21 ATMS TDR/SDR Product Updates

Date/Time Issued: May 2, 2023 1215Z

Product(s) or Data Impacted:  NOAA-21 ATMS TDR/SDR and BUFR

Date/Time of Initial Impact: May 15, 2023 TBD

Date/Time of Expected End: May 15, 2023 TBD

Length of Outage: N/A

Details/Specifics of Change:

The ATMS science team updated the NOAA-21 ATMS processing coefficient table (PCT) to improve the ATMS TDR/SDR and BUFR products. 

The scientific changes include 1) beam pointing angles updates; 2) cold bias correction coefficient updates; 3) NOAA-21 reflector emissivity updates; and 4) TDR-to-SDR conversion coefficient updates. 

For detailed information regarding the updates, please contact the ATMS science team (

Please note: This upgrade will not be performed during Critical Weather Day (CWD).

Also, the contents of this release are subject to change based on user readiness, customer feedback, and management approval.

Additional ESPC notifications will provide further details and updates concerning this update. User feedback and questions should be directed to Shuang Qiu (

Contact Information: For information on the status of this work, please contact Shuang Qiu (Shuang or ESPC Operations at or 301-817-3880

This message was sent to You have been sent this and other notifications because you have opted in to receive it. If you wish to unsubscribe please contact the ESPC Help Desk at or (301) 817-3880. Please note: it may take up to two business days to process your unsubscribe request.