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*TOPIC:* N20 DRAG MAKE-UP MANEUVER (DMU) SCHEDULED FOR SEPTEMBER 25, 2024

*DATE/TIME ISSUED:* SEPTEMBER 23, 2024 1826Z

*PRODUCT(S) OR DATA IMPACTED*: ALL N20 SENSOR DATA

*DATE/TIME OF INITIAL IMPACT:* SEPTEMBER 25, 2024 15:55:00Z

*DATE/TIME OF EXPECTED END*: SEPTEMBER 25,2024 18:02:40Z

*LENGTH OF OUTAGE*: SEE DETAILS.

*DETAILS/SPECIFICS OF CHANGE:* ON SEPTEMBER 25, 2024 16:21:00Z, N20 WILL
PERFORM A 5.0 SECOND PROPULSIVE DRAG MAKEUP MANEUVER (DMU) TO MAINTAIN MEAN
LOCAL TIME OF THE ASCENDING NODE WHILE CONTROLLING THE REPEATING GROUND
TRACK BOX.

THE FOLLOWING OBSERVATORY SYSTEMS WILL BE AFFECTED ON SEPTEMBER 25, 2024:

15:55:00Z     18:02:40Z CERES IN CONTAM-SAFE MODE, SCIENCE DATA WILL NOT BE
AVAILABLE

16:05:00Z     16:31:10Z OMPS IN DECON MODE, SCIENCE DATA WILL NOT BE AVAILABLE

*16:10:00Z        16:33:10Z HRD WILL BE OFF, DATA FOR DIRECT BROADCAST USERS
WILL BE UNAVAILABLE*

16:15:00Z     16:23:10Z N20 IN CONTROL FRAME 2 (DMU) (DELTA-V CONTROL FRAME)

16:15:00Z     16:28:10Z 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

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

THIS MESSAGE WAS SENT BY 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
ESPCOPERATIONS@NOAA.GOV OR (301) 817-3880. PLEASE NOTE: IT MAY TAKE UP TO
TWO BUSINESS DAYS FOR REQUEST TO TAKE EFFECT.

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