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000
NOUS72 KNES 242204
ADMNES
UPDATE #1: DURING REV 64729 (AOS 18:29:46Z), OPERATIONS RECEIVED MULTIPLE
VIIRS YH ALARMS INDICATING S-NPP VIIRS EXPERIENCED AN ANOMALY AND THE
INSTRUMENT ENTERED AN ANOMALOUS STATE (SINGLE BOARD COMPUTER LOCKUP
SUSPECTED). ENGINEERING HAS STARTED RECOVERY STEPS AND WAS ABLE TO RESTORE
THE INSTRUMENT INTO AN OPERATIONAL STATE IN OP-DAY MODE BY 21:54Z.
ENGINEERING WILL RESUME THE REMAINING RECOVERY STEPS ON THURSDAY, APRIL 25,
2024.

ALL MISSED S-NPP VIIRS DATA WILL NOT BE RECOVERABLE. ALL VIIRS SCIENCE DATA
EXCEPT DAY NIGHT PRODUCTS ARE VALID FOR OPERATIONAL USE. A FUTURE UPDATE
WILL PROVIDE THE STATUS ON WHEN THE DAY NIGHT BANDS ARE READY FOR
OPERATIONAL USE. THE NOAA-21 AND NOAA-20 VIIRS INSTRUMENTS WILL CONTINUE TO
PROVIDE ALL OTHER JPSS VIIRS DATA NEEDS.

 ALL S-NPP VIIRS SCIENCE AND CRIS BUFR PRODUCTS ARE IMPACTED BY THE ONGOING
ISSUE.

*TOPIC*: NPP SMD DATA DELAY
* DATE/TIME ISSUED*: APRIL 24,  2024 2150Z

*PRODUCT(S) OR DATA IMPACTED*: JPSS NPP DATA PRODUCTS

*DATE/TIME OF INITIAL IMPACT:* APRIL 24, 2024  1829Z

*DATE/TIME OF EXPECTED END TIME:*   APRIL 24, 2024  2012Z

*LENGTH OF OUTAGE* : TBD

*DETAILS/SPECIFICS OF CHANGE*  : DUE TO AN INSTRUMENT ISSUE VIIRS SMD DATA
WAS NOT RECEIVED FOR REV 64729 AT SVL. DATA SHOULD BE AUTOMATICALLY
RECOVERED ON THE NEXT SVL ON REV 64730.

*CONTACT INFORMATION FOR FURTHER INFORMATION*: ESPC OPERATIONS AT
ESPCOPERATIONS@NOAA.GOV AND 301-817-3880

*WEB SITE(S) FOR APPLICABLE INFORMATION*: N/A

THIS MESSAGE WAS SENT BY ESPC.NOTIFICATION@NOAA.GOV. YOU HAVE BEEN SENT
THIS AND OTHER NOTIFICATIONS BECAUSE YOU HAVE OPTED IN TO RECEIVE IT. IF
FOR ANY REASON, YOU WISH TO UNSUBSCRIBE, PLEASE CONTACT ESPC HELP DESK AT
ESPCOPERATIONS@NOAA.GOV OR (301) 817-3880. PLEASE NOTE: IT MAY TAKE UP TO
TWO BUSINESS DAYS TO PROCESS YOUR UNSUBSCRIBE REQUEST.

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