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SUBJECT: PRODUCT OUTAGE/ANOMALY: ESPC NOTICE: NOAA-20 VIIRS LUNAR
CALIBRATION
 ROLL MANEUVER SCHEDULED FOR MAY 7TH, 2025 ISSUED: MAY 2, 2025 1440Z
TO: ESPC.NOTIFICATION@NOAA.GOV, N20-MISSION-SEGMENTS@LISTS.NASA.GOV
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*TOPIC: *NOAA-20 VIIRS LUNAR CALIBRATION ROLL MANEUVER SCHEDULED FOR
MAY 7,
2025

*DATE/TIME ISSUED:* MAY 02, 2025 14:40:00Z

*PRODUCT(S) OR DATA IMPACTED:* ALL NOAA-20 SENSOR DATA

*DATE/TIME OF INITIAL IMPACT:*  MAY 7, 2025 21:48:57Z J/DAY 127

*DATE/TIME OF EXPECTED END: * MAY 7, 2025 22:50:57Z  J/DAY 127

*LENGTH OF OUTAGE:*  SEE DETAILS.

*DETAILS/SPECIFICS: *ON  MAY 7, 2025 , NOAA-20 WILL PERFORM A
SPACECRAFT
ATTITUDE MANEUVER FOR THE VIIRS LUNAR CALIBRATION, WITH A ROLL OF -3
DEGREES CENTERED AT 22:13:57Z. SCIENCE DATA MAY BE IMPACTED WHILE THE
SPACECRAFT IS POINTING OFF-NADIR DURING THE ATTITUDE MANEUVER AND
THE CERES
INSTRUMENT WILL NOT PROVIDE NOMINAL SCIENCE DATA AS IT WILL BE PLACED
IN A
CONTAMINATION SAFE MODE.  THE TIMELINE OF EVENTS FOR THIS MANEUVER ARE
PROVIDED BELOW.

THE FOLLOWING OBSERVATORY SYSTEMS WILL BE AFFECTED ON 2025 MAY 7TH:
*21:48:57Z =E2=80=93 22:50:57Z *CERES WILL BE IN CONTAM-SAFE AND
STANDBY, S=
CIENCE
DATA WILL NOT BE AVAILABLE
*22:03:57Z =E2=80=93 22:25:57Z HRD WILL BE OFF, DATA FOR DIRECT
BROADCAST =
USERS
WILL BE UNAVAILABLE*
*22:08:25Z =E2=80=93 22:21:29Z* VIIRS ENCODER OFFSET AND GAIN WILL
BE SET F=
OR MOON
OBSERVATION
*22:08:57Z =E2=80=93 22:20:57Z *NOAA-20 WILL BE POINTING OFF-NADIR,
COLLECT=
ED DATA
MAY BE IMPACTED AND NOT DISSEMINATED

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)

--00000000000055F8F706342821C6
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CONTENT-TRANSFER-ENCODING: QUOTED-PRINTABLE

TOPIC:=C2=A0NOAA-20 VIIRS LUNAR CALIBRATION ROLL MANEUVER
SCHEDUL=
ED FOR MAY 7, 2025

DATE/TIME ISSUED:=C2=A0MAY 02, 2025
14:40:00Z

PRODUCT(S) O=
R DATA IMPACTED:=C2=A0 ALL NOAA-20 SENSOR
DATA

DATE/TIME OF INITIAL
IMPACT=
:=C2=A0 =C2=A0MAY 7, 2025 21:48:57Z J/DAY
127

=
DATE/TIME OF EXPECTED
END:=
=C2=A0=C2=A0MAY 7, 2025 22:50:57Z=C2=A0

J/DAY
127

LENGTH OF OUTAGE:=C2=A0
SEE=
 DETAILS.

DETAILS/SPECIFICS:=C2=A0ON =C2=A0MAY 7, 2025 , NOAA-20
WILL PERF=
ORM A SPACECRAFT ATTITUDE MANEUVER FOR THE VIIRS LUNAR CALIBRATION,
WITH A =
ROLL OF -3 DEGREES CENTERED AT 22:13:57Z. SCIENCE DATA MAY BE
IMPACTED WHIL=
E THE SPACECRAFT IS POINTING OFF-NADIR DURING THE ATTITUDE MANEUVER
AND THE=
 CERES INSTRUMENT WILL NOT PROVIDE NOMINAL SCIENCE DATA AS IT WILL
 BE PLACE=
D IN A CONTAMINATION SAFE MODE.=C2=A0 THE TIMELINE OF EVENTS FOR
THIS MANEU=
VER ARE PROVIDED BELOW.

THE FOLLOWING OBSERVATORY SYSTEMS WILL BE AFFECTED
ON 202=
5 MAY 7TH:
21:48:57Z =E2=80=93
22:50:57Z=C2=A0CERES WI=
LL BE IN CONTAM-SAFE AND STANDBY, SCIENCE DATA WILL NOT BE
AVAILABLE
22:03:57Z =E2=80=93 22:25:57Z =C2=A0HRD WILL BE OFF,
DATA FOR=
 DIRECT BROADCAST USERS WILL BE UNAVAILABLE
22:08:=
25Z =E2=80=93 22:21:29Z=C2=A0VIIRS ENCODER OFFSET AND GAIN WILL
BE SET =
FOR MOON OBSERVATION
22:08:57Z =E2=80=93
22:20:57Z=C2=A0NOAA-20 WILL BE POINTING OFF-NADIR, COLLECTED DATA MAY BE IMPACTED
AND NO=
T DISSEMINATED=C2=A0

THIS NOTIFICATION WAS SENT
TO=C2=A0<=
A HREF=3D"MAILTO:ESPC.NOTIFICATION@NOAA.GOV" TARGET=3D"_BLANK"
STYLE=3D"FON=
T-FAMILY:ARIAL,SANS-SERIF;FONT-SIZE:LARGE">ESPC.NOTIFICATION@NOAA.GOV=C2=A0MAILING 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 NO=
TE: IT MAY TAKE UP TO TWO BUSINESS DAYS TO PROCESS YOUR REQUEST. FOR
ANY AD=
DITIONAL INFORMATION YOU CAN REACH ESPC AT 301-817-3880
(24X7)