Update #1: The EXIS cruciform scan will be rescheduled from September 14 to September 17, 2018 from 1423 - 1600 UTC, resulting in an outage of all EXIS, GLM, and SUVI products for 1 hour and 37 minutes.

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Topic: GOES-16 EXIS quarterly calibration scans scheduled for September 11-14, 2018

Date/Time Issued: September 5, 2018 1442 UTC

Product(s) or Data Impacted: GOES-16 EXIS product outage, GLM impacts and SUVI outages with certain scans

Date/Time of Initial Impact: September 11, 2018 1722 UTC

Date/Time of Expected End: September 14, 2018 1837 UTC

Length of Outage: See schedule below

Details/Specifics of Change:

Several GOES-16 EXIS quarterly calibration scans will occur from September 11-14, 2018 following the schedule below: M-B

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An EXIS FOV map calibration will occur on September 11, 2018 from 1722-1822 UTC resulting in an outage of all EXIS and SUVI products for 1 hour.

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An EXIS EUVS C readdout noise calibration will occur on September 12, 2018 from 1655-1657 UTC resulting in an outage of all EXIS products for 2 minutes.

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An EXIS off-point calibration will occur on September 13, 2018 from 0302-0312 UTC resulting in an outage of all EXIS and SUVI products for 10 minutes.

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An EXIS cruciform scan will occur on September 14, 2018 from 1700-1837 UTC resulting in an outage of all EXIS and SUVI products for 1 hour and 37 minutes. During this scan, GLM will generate false alarms every few minutes generally around the edges of illuminated clouds.

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Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov or 301-817-3880

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Web Site(s) for applicable information:

Seehttps://www.ospo.noaa.gov/Operations/messages.html for this and other satellite related messages.

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