Effective 2022/06/30

Topic: Notification of Upcoming Orbit Location Maneuvers of GOES-17 and GOES-18
Date/Time Issued: June 30, 2022 1931 UTC
Product(s) or Data Impacted: None
Date/Time of Initial Impact: July 5, 2022 at 15:57 UTC for GOES 17 and July 5, 2022 at 16:54 UTC for GOES-18
Date/Time of Expected End: July 16, 2022 at TBD time for GOES-17 and July 20, 2022 at TBD time for GOES-18 Length of Event/Outage: N/A

Details/Specifics of Change:

NOAA will be repositioning GOES-17 and GOES-18 with synchronized burns to maintain a longitude separation of 0.3 degrees for RFI avoidance during drift and while on-station. These are both slow rate location “nudges”, as opposed to nominal drifts which are faster and cause a disruption to data availability.  Start burns will be executed July 5th and both will utilize natural drift to stop at their new stations.

GOES-17 nudge start at 137.2W on July 5th at 15:57 UTC
GOES-17 nudge stop at 137.3W on July 16th at TBD time
GOES-18 nudge start at 136.8W on July 5th at 16:54 UTC
GOES-18 nudge stop at 137.0W on July 20th at TBD time

There are no anticipated L-band downlink impacts for GOES-17 GRB, HRIT/EMWIN and DCS users regarding the 0.1 degree westward longitudinal drift.  Antennas smaller than 7m should not need to repoint.  Antennas larger than 7m should repoint.Users are reminded to peak their antennas after the nudge periods end in order to achieve the best optimal signal.

Contact Information for Further Information: Joseph Fiore at joseph.fiore@noaa.gov

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