161
NOUS72 KNES 171449
ADMNES
SUBJECT: NOAA-20 RISK MITIGATION MANEUVER (RMM-002) SCHEDULED FOR
JUNE 17,
 2025 - ISSUED JUNE 17, 2025 1409Z
TO: ESPC.NOTIFICATION@NOAA.GOV, N20-MISSION-SEGMENTS@LISTS.NASA.GOV
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*TOPIC: *NOAA-20 RISK MITIGATION MANEUVER (RMM)

*DATE/TIME ISSUED:* JUNE 17, 2025 1409Z

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

*DATE/TIME OF INITIAL IMPACT: *JUNE 17, 2025 17:57:30Z

*DATE/TIME OF EXPECTED END:* JUNE 17 ,2025 19:00:40Z

*LENGTH OF OUTAGE: *SEE DETAILS.

*DETAILS/SPECIFICS OF CHANGE: *ON JUNE 17, 2025 18:23:00Z,

NOAA-20 WILL PERFORM A 3.0 SECOND PROPULSIVE RISK MITIGATION MANEUVER
(RMM) TO AVOID AN ORBITAL DEBRIS CLOSE APPROACH.

THE FOLLOWING OBSERVATORY SYSTEMS WILL BE AFFECTED ON JUNE 17, 2025:

17:57:30Z =E2=80=93 19:00:40Z CERES IN CONTAM-SAFE MODE, SCIENCE DATA
WILL =
NOT BE
AVAILABLE

18:07:00Z =E2=80=93 18:33:10Z OMPS IN DECON MODE, SCIENCE DATA WILL
NOT BE =
AVAILABLE

18:12:00Z - 17:12:24Z HRD WILL BE OFF, DATA FOR DIRECT BROADCAST
USERS WILL
BE UNAVAILABLE

18:17:00Z =E2=80=93 18:23:03Z N20 IN CONTROL FRAME 2 (DMU) (DELTA-V
CONTROL=
 FRAME)

18:17:00Z =E2=80=93 18:30:10Z N20 POINTING OFF-NADIR, COLLECTED
DATA DURING=
 THAT
TIME PERIOD
MAY BE IMPACTED AND NOT DISSEMINATED

*CONTACT INFORMATION FOR FURTHER INFORMATION:* ESPC OPERATIONS AT
ESPCOPERATIONS@NOAA.GOV AT 301-817-3880

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)

--000000000000C2DBBF0637C51104
CONTENT-TYPE: TEXT/HTML; CHARSET="UTF-8"
CONTENT-TRANSFER-ENCODING: QUOTED-PRINTABLE

=
TOPIC:=C2=A0NOAA-20 RISK MITIGATION MANEUVER (RMM)

DATE/TIME ISSUED:=C2=A0JUNE 17, 2025
1409Z

PRO=
DUCT(S) OR DATA IMPACTED: ALL NOAA-20 SENSOR DATA

DATE/TIME OF INITIAL IMPACT:=C2=A0JUNE 17,
2025 1=
7:57:30Z

DATE/TIME OF
EXPECTED E=
ND:=C2=A0JUNE 17 ,2025 19:00:40Z

LENGTH OF OUTAGE:=C2=A0SEE DETAILS.

=
DETAILS/SPECIFICS OF CHANGE:=C2=A0ON JUNE 17,
2025 18:23:=
00Z,

NOAA-20 WILL PERFORM A 3.0 SECOND
PROPULS=
IVE RISK MITIGATION MANEUVER (RMM)=C2=A0TO AVOID AN ORBITAL=C2=A0DEBRIS
CLO=
SE APPROACH.

THE FOLLOWING OBSERVATORY
SYSTEMS=
 WILL BE AFFECTED ON JUNE 17, 2025:

17:57:30Z =
=E2=80=93 19:00:40Z CERES IN CONTAM-SAFE MODE, SCIENCE DATA WILL NOT
BE AVA=
ILABLE

18:07:00Z =E2=80=93 18:33:10Z
OMPS IN D=
ECON MODE, SCIENCE DATA WILL NOT BE AVAILABLE

=
18:12:00Z=C2=A0- 17:12:24Z HRD WILL BE OFF, DATA FOR DIRECT BROADCAST
USERS=
 WILL BE UNAVAILABLE

18:17:00Z=C2=A0=E2=80=93 =
18:23:03Z N20 IN CONTROL FRAME 2 (DMU) (DELTA-V CONTROL FRAME)

18:17:00Z=C2=A0=E2=80=93 18:30:10Z N20 POINTING
OFF-NADIR,=
 COLLECTED DATA DURING THAT TIME PERIOD=C2=A0
MAY
 BE IMPACTED=
 AND NOT DISSEMINATED

CONTACT
 INFORMATION F=
OR FURTHER INFORMATION: ESPC OPERATIONS AT=C2=A0ESPCOPERATIONS@NOAA.GOV=C2=A0AT 301-817-3880

THIS NOTIFICATION WAS
SENT T=
O=C2=A0ESPC.NOTIFICATION@NOAA.GOV=C2=A0MAILING LIST. IF YOU WISH TO UNSUBSCRIBE
OR SUBSCR=
IBE TO THIS LIST, PLEASE CONTACT ESPC HELP-DESK AT=C2=A0ESPCOPERATIONS@NOAA.GOV=C2=A0WITH YO=
UR REQUEST. PLEASE NOTE: IT MAY TAKE UP TO TWO
BUSINESS=C2=A0DAYS=C2=A0TO P=
ROCESS YOUR REQUEST. FOR ANY ADDITIONAL INFORMATION YOU CAN REACH
ESPC AT 3=
01-817-3880 (24X7)
=



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=