Topic:
NOAA-17 AVHRR Scan Motor Degradation
Date/Time Issued:
February 19, 2010, 1800 UTC
Product(s) or Data Impacted:
NOAA-17 AVHRR
Date/Time of Initial Impact:
February 12, 2010
Date/Time of Expected End:
TBD
Length of Event:
TBD
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 Dejiang.Han@noaa.gov 301-817-4119 Level 1B operations support
Web site(s) that contain other relevant information (where applicable):
http://www.osdpd.noaa.gov/PSB/PPP/PPP.html - History of level 1B notices
http://www.ssd.noaa.gov/PS/SATS/messages.html - All user notices
http://www.oso.noaa.gov/poes/index.htm - SOCC polar satellite status