642
NOUS72 KNES 161834
ADMNES
UPDATE #1:  THE SPACECRAFT RECOVERY ACTIVITIES PERFORMED THUS FAR ON THE
S-NPP SPACECRAFT DID NOT RESOLVE THE DEGRADATION OF THE S-NPP SCIENCE
PRODUCTS SEEN FOLLOWING THIS ANOMALY. ENGINEERING IS WORKING WITH THE
SPACECRAFT VENDOR TO DEVELOP A PLAN FOR A PATH FORWARD.


S-NPP SCIENCE DATA WILL REMAIN DISABLED FROM PDA OPS AND THROUGH HRD UNTIL
FURTHER NOTICE.


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


*TOPIC:* GPS INVALID ON S-NPP SPACECRAFT



*DATE/TIME ISSUED:* JULY 16, 2024  1823Z



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



*DATE/TIME OF INITIAL IMPACT:* JULY 09, 2024 2146Z



*DATE/TIME OF EXPECTED END TIME:*   TBD



*LENGTH OF EVENT:* TBD



*DETAILS:* STARTING ON JULY 09 AT ~2146Z , THE GPS RECEIVER 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 JULY 12, 2024.

ALL PDA OPS SUBSCRIPTIONS FOR ALL S-NPP SCIENCE PRODUCTS WILL BE DISABLED
AT 1630Z  ON JULY 10, 2024.

S-NPP HIGH RATE DATA (HRD) WILL BE DISABLED ON JULY 10 AT 1743Z  FOR ALL
SCIENCE PRODUCTS.

THE NOAA-21 AND NOAA-20 SATELLITES WILL CONTINUE TO PROVIDE JPSS SCIENCE
DATA NEEDS 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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