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UPDATE #2: THE IMPLEMENTATION DATE HAS BEEN RESCHEDULED FROM JULY 1, 2024
TO JANUARY 27, 2025.


UPDATE #1: THIS UPDATE IS INTENDED FOR CLARIFICATION AS WELL AS AN UPDATE
TO THE EXPECTED IMPLEMENTATION DATE.

IN JANUARY 2025, OPERATIONAL DISTRIBUTION OF VIIRS SDR IMAGERY ELLIPSOID
GEOLOCATION WILL BE REDUCED TO A SINGLE SATELLITE:

   -

   S-NPP ELLIPSOID GEOLOCATION FOR M BAND (GMODO) WILL CONTINUE AND WILL
   NOT BE ASSOCIATED OR PACKAGED ALONG WITH VIIRS M BAND SDRS GOING FORWARD.
   NOAA-20 AND NOAA-21 ELLIPSOID GEOLOCATION M BAND MAY REPLACE S-NPP IN THE
   FUTURE/BUT ONLY A SINGLE SATELLITE WILL BE PRODUCED.
   -

   S-NPP, NOAA-20 AND NOAA-21 VIIRS I BAND AND M BAND SDR DATA GOING
   FORWARD WILL BE ASSOCIATED WITH TERRAIN CORRECTED GEOLOCATION (GITCO AND
   GMTCO).

NO CHANGES TO THE FOLLOWING VIIRS GEOLOCATION FOR ANY OF THE THREE JPSS
SPACECRAFT:

   -

   VIIRS DAY-NIGHT BAND GEOLOCATION (GDNBO) WILL CONTINUE FOR ALL
   SATELLITES AND WILL CONTINUE TO BE ASSOCIATED WITH THE VIIRS DAY/NIGHT BAND
   SDR PRODUCT (SVNDB).
   -

   VIIRS IMAGERY EDR GEOLOCATION FOR BOTH I BAND (GIGTO) AND M BAND
   (GMGTO) WILL CONTINUE FOR ALL SATELLITES AND WILL BE ASSOCIATED WITH THE
   VIIRS I BAND AND M BAND EDRS
   -

   VIIRS AGGREGATE DUAL GAIN GEOLOCATION (ICDBG) WILL CONTINUE FOR ALL
   SATELLITES AND WILL CONTINUE TO BE ASSOCIATED WITH THE VIIRS DUAL GAIN IP
   -

   VIIRS NCC GTM GEOLOCATION (GNCCO) WILL CONTINUE FOR ALL SATELLITES AND
   WILL CONTINUE TO BE ASSOCIATED WITH THE VIIRS NCC EDR

PRODUCT (S) OR DATA IMPACTED:

   -

   DISCONTINUATION OF S-NPP VIIRS-IMG-GEO
   -

   DISCONTINUATION OF NOAA-20 VIIRS-IMG-GEO AND VIIRS-MOD-GEO
   -

   DISCONTINUATION OF NOAA-21 VIIRS-IMG-GEO AND VIIRS-MOD-GEO

PRODUCT (S) TO BE USED:

   -

   S-NPP, NOAA-20 AND NOAA-21 VIIRS IMG-GEO-TC AND VIIRS-MOD-GEO-TC



TOPIC: JPSS ELLIPSOID GEOLOCATION PRODUCT REDUCTION



DATE/TIME ISSUED: MAY 24, 2024 1600Z



PRODUCT(S) OR DATA IMPACTED: S-NPP, NOAA-20, NOAA-21, VIIRS-IMG-GEO,
VIIRS-MOD-GEO, VIIRS-IMG-GEO-TC, VIIRS-MOD-GEO-TC



DATE/TIME OF INITIAL IMPACT: JANUARY 25, 2025 TBD UTC



DATE/TIME OF EXPECTED END: N/A



LENGTH OF OUTAGE: N/A



DETAILS/SPECIFICS OF CHANGE:


ALL S-NPP, JPSS-1, JPSS-2 VIIRS IMAGERY ELLIPSOID GEOLOCATION WILL BE
DISCONTINUED, AND THE JPSS-1, JPSS-2 VIIRS MODERATE ELLIPSOID GEOLOCATION
WILL BE DISCONTINUED, LEAVING ONLY THE S-NPP VIIRS MODERATE ELLIPSOID
GEOLOCATION AVAILABLE. DOWNSTREAM USERS ARE DIRECTED TO USE THE S-NPP,
JPSS-1, AND JPSS-2 VIIRS IMAGERY AND MODERATE TC GEOLOCATION.

   -

   S-NPP (TBC) VIIRS MODERATE ELLIPSOID GEOLOCATION WILL CONTINUE TO BE
   DELIVERED, BUT WILL NOT BE ASSOCIATED WITH ANY S-NPP VIIRS PRODUCT
   -

   CLASS GOING FORWARD WILL PACKAGE VIIRS SDRS WITH TERRAIN CORRECTED
   GEOLOCATION, AND VIIRS SDRS OLDER THAN SPRING 2024 WILL BE PACKAGED WITH
   ELLIPSOID GEOLOCATION.


SPACECRAFT

OLD PRODUCT(S) TO BE TERMINATED

PRODUCT(S) TO BE USED

S-NPP

VIIRS-IMG-GEO, VIIRS-MOD-GEO

VIIRS-IMG-GEO-TC, VIIRS-MOD-GEO-TC

NOAA-20

VIIRS-IMG-GEO, VIIRS-MOD-GEO

VIIRS-IMG-GEO-TC, VIIRS-MOD-GEO-TC

NOAA-21

VIIRS-IMG-GEO, VIIRS-MOD-GEO

VIIRS-IMG-GEO-TC, VIIRS-MOD-GEO-TC


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


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