From:
12:20 PM
Subject: All Satellites, All Instruments, Error in Level 1B Processing, 1 January 2004 - Issued: 5 January 2004; 1700 UTC
Resent-From: nesdis.osdpd.ipd.Level-1B.notices@noaa.gov,
nesdis.osdpd.ipd.contractors@noaa.gov
To: undisclosed-recipients:;
Topic:
POES Level 1B GHA Problem
Date/Time(UTC) Message Issued:
5 January 2004,1900 UTC
Satellite(s) Involved:
ALL
Instrument(s) Involved:
ALL
Product(s) Involved/Affected:
ALL
Date/Time(UTC) of Initial Implementation:
1 January 2004, Time 0000 UTC
Details/Specifics of Change:
When processing crossed into the new year, Greenwich Hour Angle computation
began producing erroneous values. The problem was not detected until
today. This error creates a problem for the navigation data provided in the
level 1B (lat/lon, Keplerian orbit parameters), TBUS (GHA, Longitude,
Brouwer Mean Elements), and SAR ephemeris (Earth Centered Coordinates). We
are investigating the problem. Level 1B processing has been suspended
temporarily.
Contact Person(s) Name/Email/Phone Number for Questions:
Emily.Harrod@noaa.gov/301-457-5247 ext. 117
Mac.McCreary@noaa.gov/301-457-0914 ext. 155
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/poesstatus/ - SOCC polar satellites status
http://www.oso.noaa.gov/daily-news/index.htm - SOCC morning reports