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SUBJECT: PRODUCT OUTAGE/ANOMALY: UPDATE #1: CORRECTION NOAA-21 ACSPO
SST AND
 VIIRS RADIANCE CLUSTER NO RETRIEVALS - ISSUED: JULY 29, 2026 1615Z
TO: _NESDIS OSPO ESPC OUTAGE NOTIFICATION 
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*CORRECTION: ISSUE DATE CORRECTED TO JULY 29*
UPDATE #1: ENGINEERING WILL START NOAA-21 VIIRS RECOVERY OPERATIONS
JULY 29
AT 16:36 UTC TO RESOLVE THE ISSUE, WHICH IS ERRONEOUSLY FLAGGING GOOD
NOAA-21 VIIRS M14-M16 AND I5 LONG WAVE INFRARED (LWIR) DATA FOR POOR
QUALITY. THE PROCEDURE MAY TAKE A FEW CONTACTS, WITH THE EXPECTED
COMPLETION AT 20:10 UTC ON JULY 29. USERS MAY EXPERIENCE NOAA-21 VIIRS
SCIENCE DATA OUTAGE DURING THE TIME. ANY MISSED DATA DURING THIS
RECOVERY
PERIOD IS EXPECTED TO BE UNRECOVERABLE. EXPECTED END TIME ADDED BELOW.
TOPIC: NOAA-21 ACSPO SST AND VIIRS RADIANCE CLUSTER NO RETRIEVALS

DATE/TIME ISSUED: JULY 29, 2026  1615Z


PRODUCT(S) OR DATA IMPACTED: NOAA-21 ACSPO SST, VIIRS RADIANCE
CLUSTER, AND
CRIS SDR BUFR


DATE/TIME OF INITIAL IMPACT: JULY 28, 2026 0542Z


DATE/TIME OF EXPECTED END:  JULY 29, 2026 200Z

LENGTH OF OUTAGE:   38 HOURS 28 MINS

DETAILS/SPECIFICS: STARTING 0542Z ON JULY 28, NOAA-21 ACSPO SST
AND VIIRS
RADIANCE CLUSTER PRODUCED PRODUCTS WITHOUT MEANINGFUL RETRIEVALS. THE
VIIRS
RADIANCE CLUSTER WITHIN NOAA-21 CRIS SDR BUFR ARE ALL FILL VALUES. THIS
ISSUE IMPACTED THE SAME PRODUCTS ON COMMUNITY SATELLITE PROCESSING
PACKAGE
(CSPP). INVESTIGATION IS ONGOING.

THIS NOTIFICATION WAS SENT TO ESPC.NOTIFICATION@NOAA.GOV MAILING
LIST. IF
YOU WISH TO UNSUBSCRIBE OR SUBSCRIBE TO THIS LIST, PLEASE CONTACT ESPC
HELP-DESK AT ESPCOPERATIONS@NOAA.GOV WITH YOUR REQUEST. PLEASE NOTE:
IT MAY
TAKE UP TO TWO BUSINESS DAYS TO PROCESS YOUR REQUEST. FOR ANY
ADDITIONAL
INFORMATION YOU CAN REACH ESPC AT 301-817-3880 (24X7)

--000000000000FB1ADF0657C24456
CONTENT-TYPE: TEXT/HTML; CHARSET="UTF-8"
CONTENT-TRANSFER-ENCODING: QUOTED-PRINTABLE

CORRECTION: ISSUE DATE CORRECTED TO JULY 29
UPD=
ATE #1: ENGINEERING WILL START NOAA-21 VIIRS RECOVERY
OPERATIO=
NS JULY 29 AT 16:36 UTC TO RESOLVE THE ISSUE, WHICH IS
ERRONEOUSLY=
 FLAGGING GOOD NOAA-21 VIIRS M14-M16 AND I5 LONG WAVE INFRARED (LWIR)
 DATA =
FOR POOR QUALITY. THE PROCEDURE MAY TAKE A FEW CONTACTS, WITH THE
EXPECTED =
COMPLETION AT 20:10 UTC ON JULY 29. USERS MAY EXPERIENCE NOAA-21
VIIRS SCIE=
NCE DATA OUTAGE DURING THE TIME. ANY MISSED DATA DURING THIS RECOVERY
PERIO=
D IS EXPECTED TO BE UNRECOVERABLE. EXPECTED END TIME ADDED
BELOW. 
TOPIC: NOAA-21 ACSPO SST AND VIIRS
RADIANCE =
CLUSTER NO RETRIEVALS
DAT=
E/TIME ISSUED: JULY 29, 2026=C2=A0
1615Z  

PRODUCT(S) OR DATA
IMPACTED=
: NOAA-21 ACSPO SST, VIIRS RADIANCE
CLUSTER, A=
ND CRIS SDR BUFR

DATE=
/TIME OF INITIAL IMPACT: JULY 28, 2026 0542Z=C2=A0=C2=A0

DATE/TIME
OF =
EXPECTED END: =C2=A0JULY
29, 20=
26 200Z=C2=A0=C2=A0

LENGTH OF OUTAGE:=C2=A0
=C2=
=A038 HOURS 28 MINS=C2=A0=C2=A0

<=
/P>
DETAILS/SPECIFICS:
STARTING 0542Z ON JULY 28, NOAA-21 ACSPO SST AND VIIRS RADIANCE
CLUST=
ER PRODUCED PRODUCTS WITHOUT MEANINGFUL RETRIEVALS. THE VIIRS
RADIANCE CLUS=
TER WITHIN NOAA-21 CRIS SDR BUFR ARE ALL FILL VALUES. THIS ISSUE
IMPACTED T=
HE SAME PRODUCTS ON COMMUNITY SATELLITE PROCESSING PACKAGE
(CSPP).=C2=A0INV=
ESTIGATION IS ONGOING. 

THIS NOTIFICATION WAS SENT TO=C2=A0ESPC.NOTIFICATION@NOAA.GOV=C2=A0=
MAILING LIST. IF YOU WISH TO UNSUBSCRIBE OR SUBSCRIBE TO
THIS LIST=
, PLEASE CONTACT ESPC HELP-DESK AT=C2=A0ESPCOPERATIONS@NOAA.GOV=C2=A0WITH YOUR REQUEST. PLEASE NOTE:
IT MAY TAK=
E UP TO TWO BUSINESS DAYS TO PROCESS YOUR REQUEST. FOR ANY ADDITIONAL
INFOR=
MATION YOU CAN REACH ESPC AT 301-817-3880
(24X7)

--000000000000FB1ADF0657C24456--


=