NOTE: The nws-changes mailing list is no longer active. The list archives are made available for historical reasons.
Topic: NOAA-16 AVHRR Degradation Message Issued: September 22, 2003, 2000 UTC Satellites Impacted: NOAA-16 Products Impacted: AVHRR Date/Time of Initial Impact: September 17, 2003 0700 UTC ----------------------------------------- Details: At approximately 07:00Z on 17 Sept, the N16 AVHRR scan motor current and its synch delta word began to act erratically running up as high as 287 mAmps (vs nominal 230). As of this writing, it has not returned to a nominal performance profile. Engineers are making every attempt to maintain data quality and are currently reviewing potential actions to correct the problem. The following immediate plans are to disable automatic rephasing to minimize the loss of data. Controllers will then enable rephasing once per 12 hour shift (on the first available contact per shift that time permits). Operational impacts are: 1) each time rephasing occurs there will be a drop in TIP frames (1 or 2 frames) and 2) the pointing of the AVHRR may not be as accurate in between times to rephase. Rephase will only occur if needed during the time it is enabled as mentioned above. ----------------------------------------- Contact Information: Brian Hughes Satellite Services Division NOAA/NESDIS/OSDPD 301-763-8081 x106 Brian.Hughes@xxxxxxxx See http://www.ssd.noaa.gov/PS/SATS/messages.html for this and other satellite related messages. See http://www.ssd.noaa.gov for full GOES scanning schedules.
nws-changes archives: