From:
5:07 PM
Subject: NOAA-17, AMSU-A1 Anomaly Update, 30 October 2003 - Issued: 29 October 2003; 2215 UTC
Resent-From: nesdis.osdpd.ipd.Level-1B.notices@noaa.gov,
nesdis.osdpd.ipd.contractors@noaa.gov
Topic:
Attempts to restore AMSU-A1
Date/Time(UTC) Message Issued:
29 October 2003, 2215 UTC
Satellite(s) Involved:
NOAA-17
Instrument(s) Involved:
AMSU-A1
Product(s) Involved/Affected:
All products
Date/Time(UTC) of Initial Implementation:
28 October 2003, Time 0420 UTC (problem began)
Details/Specifics of Change:
NOAA and NASA continue to investigate the NOAA-17 AMSU-A1 reflector motor
failure. The most probable cause has been determined, a failed DC/DC
converter. The anomaly signature of a simultaneous lost of both reflector
scan motors and the non-nominal voltages and temperatures telemetry were key
in deducing the cause.
An instrument recovery attempt is underway. The effort involves turning the
instrument OFF for a period of time to cool the instrument, then, turning it
ON. The ON state will be taken over several steps and end with the
instrument's motors activated. Several attempts are planned.
Contact Person(s) Name/Email/Phone Number for Questions:
Emily.Harrod@noaa.gov/301-457-5247 ext. 117
Robert.Levin@noaa.gov/301-457-5247 ext. 124
Web site(s) that contain other relevant information (where applicable):
http://noaasis.noaa.gov/NOAASIS/ml/gateway.html (under "Satellite ...
Calibration")
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/poesstatus/ - SOCC polar satellites status
http://www.oso.noaa.gov/daily-news/index.htm - SOCC morning reports