Update #1 (Final Update): Alaska 4 has returned to normal operations.

Topic: SARSAT Alaska 4 Low Earth Orbit (LEO) Ground Station Offline

Date/Time Issued: February 13, 2022 2026Z

Product(s) or Data Impacted: SARSAT alert data

Date/Time of Initial Impact: February 11, 2022 1227Z

Date/Time of Expected End: February 11, 2044Z

Length of Outage: 8 hours and 17 minutes

Details/Specifics of Change: The Alaska 4 (AK4) LEO Ground Station located in Fairbanks, AK has missed consecutive passes. The maintenance vendor has previously reported an intermittent azimuth antenna issue that's related to the low temperatures in Fairbanks, AK.

Impact: Minor-Dual satellite tracking capability lost. Distress alert detection/reporting may be delayed.

SARSAT United States Mission Control Center

Office: 1.301.817.4576 | Fax: 1.301.817.4568

usmcc@noaa.gov | www.sarsat.noaa.gov

Web Site(s) for applicable information: N/A

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