NOAA-15 137.62MHz APT受信不良（画像スキャンモーター不具合）

１０月２３日　NOAA15-10230925 18:25(JST) 137.62MHz

NOAA15のAPT画像が正常に受像できないとの情報があり、10月23日夕方のコースを受信した結果受信不良が確認できました。
画像スキャンモーターの不具合ということのようです。
NOAAのGeneral Satellite Messagesに情報が上がっていました。

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.