607
NOUS72 KNES 081404
ADMNES
UPDATE #5: IMPLEMENTATION OF THE VERSION 8 TOTAL OZONE RETRIEVAL ALGORITHM
RETIREMENT FOR METOP-B GOME-2 HAS BEEN RESCHEDULED FOR JUNE 23, 2026.

UPDATE #4: THIS SERVES AS THE FINAL REMINDER REGARDING THE RETIREMENT OF
THE VERSION 8 TOTAL OZONE RETRIEVAL ALGORITHM, SCHEDULED FOR MONDAY JUNE
15, 2026 AT 0000 UTC.THE DISCONTINUATION APPLIES EXCLUSIVELY TO METOP-B
GOME-2 PRODUCT FILES, WHICH ARE IDENTIFIED BY "M01" IN THEIR FILENAMES.
METOP-C GOME-2 PRODUCT FILES, WHICH CONTAIN "M03" IN THE FILENAME, WILL
REMAIN IN PRODUCTION AND ARE NOT IMPACTED BY THIS CHANGE.

UPDATE #3: THE DISCONTINUATION APPLIES EXCLUSIVELY TO METOP-B GOME-2
PRODUCT FILES, WHICH ARE IDENTIFIED BY "M01" IN THEIR FILENAMES. METOP-C
GOME-2 PRODUCT FILES, WHICH CONTAIN "M03" IN THE FILENAME, WILL REMAIN IN
PRODUCTION AND ARE NOT IMPACTED BY THIS CHANGE.

UPDATE #2: THIS SERVES AS THE TWO WEEK REMINDER NOTIFICATION REGARDING THE
RETIREMENT OF THE VERSION 8 TOTAL OZONE RETRIEVAL ALGORITHM, SCHEDULED FOR
JUNE 15, 2026.

UPDATE #1: THIS SERVES AS THE 30-DAY NOTIFICATION REGARDING THE RETIREMENT
OF THE VERSION 8 TOTAL OZONE RETRIEVAL ALGORITHM, SCHEDULED FOR JUNE 15,
2026.PLEASE BE ADVISED THAT THE 30-DAY PUBLIC COMMENT WINDOW CONCLUDES
TODAY.

TOPIC: RETIREMENT OF VERSION 8 TOTAL OZONE RETRIEVAL ALGORITHM FOR METOP-B
GOME-2

DATE/TIME ISSUED: JUNE 8, 2026 1355 UTC



PRODUCT(S) OR DATA IMPACTED:

CMC_GOME_DAILY_BUFR

EMC_GOME-TO-L2_BUFR

IND_NCMRWF__GOME_TO_L2_BUFR

NOAA_STAR_POLAR_GOME_TO_GRANULES WCOSS_GOME_TO_L2_BUFR
CLASS_LEGACY_SRN_GOME-TO-L2_NC

CLASS_LEGACY_SRN_GOME-TO-L3_ASCII

CLASS_LEGACY_SRN_GOME-TO-L3_NC

CLASS_LEGACY_SRN_GOME-TO-MGII_TXT

CLASS_LEGACY_SRN_GOME_TO_GRANULES

CLOUD_INGEST_GOME_TO_GRANULES

PRODUCTS SHORT NAMES AND FILE NAMES ARE AS UNDER:

GOME-TO-L2_NC
V8TOZ-EDR_V1R1_M01_S202604141017560_E202604141020560_C202604141050440.NC

GOME-TO-L3_ASCII

GOME2-V8TO3_V1R0_M01_S202604070000000_E202604072359599_C202604081401479.ASC

GOME-TO-L3_GRB

GOME2-V8TO3_V1R0_M01_S202604130000000_E202604132359599_C202604141402100.GRIB2

GOME-TO-L3_NC

GOME2-V8TO3_V1R0_M01_S202604130000000_E202604132359599_C202604141401580.NC

GOME-TO-L2_BUFR

V8TOZ-EDR_V1R1_M01_S202604140053560_E202604140056560_C202604140127330.BUFR

GOME-TO-MGII_TXT

GOME-MGII-FINAL_V1R1_M01_S202604141159560_E202604141202560_C202604141232370.TXT

DATE/TIME OF INITIAL IMPACT: JUNE 23, 2026 0000 UTC



DATE/TIME OF EXPECTED END: NA (TERMINATION OF PRODUCT)



LENGTH OF IMPACT: NA



DETAILS/SPECIFICS OF CHANGE:

DUE TO THE NATURAL DEGRADATION OF THE GOME-2 INSTRUMENT`S OPTICAL
COMPONENTS ON METOP-B, THE SIGNAL INTENSITY (THROUGHPUT) HAS SIGNIFICANTLY
DECREASED. THIS AGING PROCESS HAS LED TO INCREASED NOISE AND REDUCED
ACCURACY IN SPECTRAL MEASUREMENTS, NEGATIVELY IMPACTING THE QUALITY OF
DERIVED PRODUCTS, SUCH AS THE AEROSOL INDEX.

AS A RESULT OF THIS DEGRADATION, OFFICE OF SATELLITE AND PRODUCT OPERATIONS
(OSPO) INTENDS TO RETIRE THE GOME2 METOP-B PRODUCTS ON JUNE 23, 2026.

WEB SITE(S) FOR APPLICABLE INFORMATION:


CONTACT INFORMATION FOR FURTHER INFORMATION: PLEASE EMAIL USER SERVICES AT
SPSD.USERSERVICES@NOAA.GOV OR PRODUCT AREA LEAD AT VAISHALI.KAPOOR@NOAA.GOV

THIS MESSAGE WAS SENT FROM 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
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