Topic: NOAA-15 AVHRR Scan Motor Current Increase Event

Date/Time Issued: July 23, 2019 1632Z

Product(s) or Data Impacted: AVHRR Products

Date/Time of Initial Impact: July 23, 2019 0435Z

Impacts on Users and Significance: AVHRR products are affected.

Date/Time of Expected End: Unknown

Length of Outage: Ongoing

Details/Specifics of Change: The NOAA-15 AVHRR Scan Motor current began showing signs of instability at approximately 0400Z on July 23, 2019. At about 0435Z the current rose sharply to about 302mA where it has remained. Scan motor temperature began rising about the same time and is currently steady at ~26M-0C. Black body temperatures dropped sharply at about the same time. The instrument appears to no longer be producing data.
This behavior is consistent with a scan motor stall, but requires further investigation. Options for recovery are limited.

Contact Information for Further Information: ESPC Operations at at 301-817-3880 and/or other contacts as necessary

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

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