Product Anomaly, NOAA-17 AVHRR Scan Motor Degradation, Issued: February 19, 2010 1800 UTC

NOAA-17 AVHRR Scan Motor Degradation

Date/Time Issued:
February 19, 2010, 1800 UTC

Product(s) or Data Impacted:

Date/Time of Initial Impact:
February 12, 2010

Date/Time of Expected End:

Length of Event:

Impacts on Users and Significance:
Possible major impact

Details/Specifics of Change:
Recently the NOAA-17 AVHRR Scan Motor began having a timing synchronization problem between the AVHRR and the MIRP. On February 12, users started to report that they received images with a sudden displacement, had data gaps, and experienced failures in processing NOAA-17 direct readout data. The same problem was believed to be observed on the previous AVHRR Scan Motors in the past. It is an instrument aging issue. The solution has been to disable the automatic re-sync by the MIRP and to activate it on a schedule. Once we reach a decision on how to implement our new schedule/procedure, we will provide a follow-up notification.

Contact Person(s) Name/Email/Phone Number for Questions:
Dejiang Han 301-817-4119 Level 1B operations support

Web site(s) that contain other relevant information (where applicable): - History of level 1B notices - All user notices - SOCC polar satellite status