Alert Administrative Message
Issued by NWS
Issued by NWS
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865 NOUS72 KNES 181834 ADMNES *TOPIC: *S-NPP DRAG MAKE-UP MANEUVER (DMU) 044 SCHEDULED FOR AUGUST 20, 2025 *DATE/TIME ISSUED: *AUGUST 18, 2025 1820Z *PRODUCT(S) OR DATA IMPACTED: *ALL S-NPP SENSOR DATA *DATE/TIME OF INITIAL IMPACT:* AUGUST 20, 2025 16:09:00 *DATE/TIME OF EXPECTED END: *AUGUST 20, 2025 18:16:04 *LENGTH OF OUTAGE:* SEE DETAILS. *DETAILS/SPECIFICS: *ON AUGUST 20, 2025 AT 16:35:00Z, NPP WILL PERFORM A 3.0 SECOND PROPULSIVE DRAG MAKE-UP MANEUVER (DMU) TO MAINTAIN THE REPEATING GROUND TRACK BOX. THE FOLLOWING OBSERVATORY SYSTEMS WILL BE AFFECTED ON AUGUST 20, 2025: *16:09:00Z 18:16:04Z:* CERES IN CONTAM-SAFE MODE, SCIENCE DATA WILL NOT BE AVAILABLE *16:19:00Z 16:46:06Z:* OMPS IN DECON MODE, SCIENCE DATA WILL NOT BE AVAILABLE *16:24:00Z 16:47:05Z:* HRD WILL BE OFF, DATA FOR DIRECT BROADCAST USERS WILL NOT BE AVAILABLE *16:29:00Z 16:42:04Z:* S-NPP POINTING OFF-NADIR, COLLECTED DATA DURING THAT TIME PERIOD MAY BE IMPACTED AND NOT DISSEMINA THIS NOTIFICATION WAS SENT TO ESPC.NOTIFICATION@NOAA.GOV MAILING LIST. IF YOU WISH TO UNSUBSCRIBE OR SUBSCRIBE TO THIS LIST, PLEASE CONTACT ESPC HELP-DESK AT ESPCOPERATIONS@NOAA.GOV WITH YOUR REQUEST. PLEASE NOTE: IT MAY TAKE UP TO TWO BUSINESS DAYS TO PROCESS YOUR REQUEST. FOR ANY ADDITIONAL INFORMATION YOU CAN REACH ESPC AT 301-817-3880 (24X7). =