From:
9:59 AM
Subject: NOAA-12, Spacecraft Clock Update Revised, 17 October 2003 - Issued: 16 October 2003; 1400 UTC
Resent-From: nesdis.osdpd.ipd.Level-1B.notices@noaa.gov,
nesdis.osdpd.ipd.contractors@noaa.gov
Topic:
Clock drift error correction revised command time
Date/Time(UTC) Message Issued:
16 October 2003, 1400 UTC
Satellite(s) Involved:
NOAA-12
Instrument(s) Involved:
All
Product(s) Involved/Affected:
All products/Improved timing
Date/Time(UTC) of Initial Implementation:
17 October 2003, Time 1740 UTC
Details/Specifics of Change:
SOCC has announced that on October 17, the elapsed time clock will be
updated to compensate for clock drift. The clock has drifted to -750
milliseconds (ms) and will be adjusted by adding a second. The update must
be done in real-time rather than at the normal 2359 UTC. The update is
scheduled for orbit number 64557 at 1740 UTC on October 17.
Once the clock drifts back into approximately a zero second offset, daily
updates will begin as with the other operational satellites. It is expected
that this daily bias will be implemented early in 2004.
Contact Person(s) Name/Email/Phone Number for Questions:
Emily.Harrod@noaa.gov/301-457-5247 ext. 117
Cecil.Paris@noaa.gov/301-457-5247 ext. 129
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