735
NOUS72 KNES 301619
ADMNES
UPDATE #2: DUE TO INCREASED DEGRADATION SEEN IN ALL S-NPP SCIENCE PRODUCTS,
ALL S-NPP SCIENCE PRODUCTS WILL BE DISABLED ON PDA OPS AT 16:00 UTC ON MAY
30, 2024.

WHILE S-NPP HIGH RATE DATA (HRD) IS ENABLED, DIRECT BROADCAST (DB) USERS
ARE ADVISED THAT THIS S-NPP SCIENCE DATA IS NOT YET CLEARED FOR OPERATIONAL
USE.

THIS SCIENCE DATA WILL CONTINUE TO BE AVAILABLE THROUGH GRAVITE, CLASS AND
PDA I&T THROUGH WHICH THE CAL/VAL TEAMS AND PALS CAN PERFORM THEIR FULL
ANALYSIS.

THE ANTICIPATED RESET OF THE S-NPP GPS UNIT IS NOW EXPECTED TO BE EXECUTED
NO EARLIER THAN JUNE 3, 2024.


UPDATE #1: PDA OPS SUBSCRIPTION FOR ALL S-NPP OMPS LIMB PROFILE (LP)
PRODUCTS INCLUDING BLENDED LTOAST PRODUCTS WILL BE DISABLED AT 21:00 UTC ON
MAY 29TH, 2024.


USERS ARE ADVISED THAT THESE S-NPP LIMB PRODUCTS HAVE BEEN DEGRADED SINCE
MAY 25TH, 2024.


AS S-NPP HIGH RATE DATA (HRD) REMAINS ENABLED FOR OMPS LP PRODUCTS, DIRECT
BROADCAST (DB) USERS ARE ADVISED THAT THIS S-NPP OMPS LP SCIENCE DATA IS
NOT YET CLEARED FOR OPERATIONAL USE.



TOPIC: GPS INVALID ON S-NPP SPACECRAFT


DATE/TIME ISSUED: MAY 30, 2024  1610Z



PRODUCT(S) OR DATA IMPACTED: ALL S-NPP VIIRS DATA PRODUCTS



DATE/TIME OF INITIAL IMPACT: MAY 25, 2024 22:30 UTC


DATE/TIME OF EXPECTED END TIME:   TBD


DURATION: TBD


DETAILS: 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. ENGINEERING HAS STARTED PLANNING THE
EXECUTION OF THE RESET OF THE GPS UNIT ON THE S-NPP SPACECRAFT. THE
ANTICIPATED RESET OF THE GPS UNIT IS EXPECTED NO EARLIER THAN MAY 29, 2024.
ALL PDA OPS SUBSCRIPTIONS FOR ALL S-NPP VIIRS SCIENCE PRODUCTS WILL BE
DISABLED AT 17:00 UTC ON MAY 28, 2024.


AS S-NPP HIGH RATE DATA (HRD) REMAINS ENABLED FOR ALL VIIRS PRODUCTS,
DIRECT BROADCAST (DB) USERS ARE ADVISED THAT THIS S-NPP VIIRS SCIENCE DATA
IS NOT YET CLEARED FOR OPERATIONAL USE.


THE NOAA-21 AND NOAA-20 SATELLITES WILL CONTINUE TO PROVIDE JPSS VIIRS
SCIENCE DATA AS THE PRIMARY AND SECONDARY SATELLITES, RESPECTIVELY.




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



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

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