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NOAA-12, Spacecraft Clock Update, 17 October 2003 - Issued: 16 October 2003; 1200 UTC

From:
8:07 AM
Subject: NOAA-12, Spacecraft Clock Update, 17 October 2003 - Issued: 16 October 2003; 1200 UTC
Resent-From: nesdis.osdpd.ipd.Level-1B.notices@noaa.gov,
nesdis.osdpd.ipd.contractors@noaa.gov

Topic:
Clock Drift Error Correction

Date/Time(UTC) Message Issued:
16 October 2003, 1200 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 1736 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 between 1736 and 1748 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


ppp@nesdis.noaa.gov

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