Update #1 (Final Update): The LUT vendor found that the HI4 SDR and Proc servers were not communicating normally. The problem was resolved and the HI4 LEO Ground Station returned to normal operations.

Correction: The HI3 LEO ground station is operating normally, and should not have been included in this anomaly report. The impact statement should read as follows: "Minor - Dual satellite tracking capability lost. Distress alert detection/reporting may be delayed." Additionally, the anomaly for the HI4 LEO ground station began at 0122Z, not 0515Z.

Topic:  SARSAT Hawaii 3 and Hawaii 4 Low Earth Orbit (LEO) Ground Stations Offline

Date/Time Issued:   October 30, 2021 1537Z

Product(s) or Data Impacted:  SARSAT alert data

Date/Time of Initial Impact:   October 30, 2021 0515Z  (October 30, 2021 0122Z)

Date/Time of Expected End:  October 30, 2021 1349Z

Length of Outage:  12 hours, 27 minutes

Details/Specifics of Change: Hawaii 3 and Hawaii 4 LEO Ground Stations located at the Naval Computer and Telecommunications Area Master Station, Pacific (HI3/HI4) are not receiving pass solution data. The LUT vendor has been contacted.

Impact: Medium - Distress alert detection/reporting may be delayed. LEOSAR distress alert detection/reporting may be delayed. GEOSAR and MEOSAR are operating normally. 

Contact Information for Further Information: USMCC Operations usmcc@noaa.gov at 

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

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