Topic: NOAA-15 AVHRR degraded image data

Date/Time Issued: Oct 22, 2022 1947Z

Product(s) or Data Impacted: AVHRR Products

Date/Time of Initial Impact: Oct 18, 2022 1800Z

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 on Oct 18 at approximately 1800Z, when the current began to gradually rise from about 205 mA to about
250 mA, where it remained until Oct 24.  At about 0000Z on Oct 24, the current began rising again throughout the day, peaking at about 302mA on Oct 25.  Scan motor temperature
began rising about the same time and is currently steady at ~29°C.  The instrument is still producing data, but it is highly degraded. This behavior may be a sign of an impending 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:

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