NOAA-17 Clock Correction, 10 December 2002 - Issued: 6 December 2002; 1945 UTCR

Fri 3:52 PM
Subject: NOAA-17 Clock Correction, 10 December 2002 - Issued: 6 December 2002; 1945 UTC

Clock Drift Correction

Date/Time(UTC) Message Issued:
6 December 2002; 1945 UTC

Satellite(s) Involved:

Instrument(s) Involved:

Product(s) Involved/Affected:
All data users

Date/Time(UTC) of Initial Implementation:
10 December 2002 23:59 UTC

Details/Specifics of Change:
The Satellite Operations Control Center (SOCC) has issued the following
notice: "NOAA-17's Elapsed Time Clock (ETC) has a small positive offset of
less than 100 milliseconds, due to a small positive drift of about one
millisecond per day. It is necessary to subtract 100 milliseconds from ETC
to eliminate the clock offset. This update is scheduled for December lOth,
2002 via SCT at 23:59:00Z for the control On-Board Processor (OBP)."

The Information Processing Division (IPD) will update our clock drift file
information on the web site to reflect this change. Please remember that
we are not performing clock drift corrections within the level 1B
processing. Hence, only those changes made by SOCC will be seen in the
spacecraft instrument data. If you are performing your own clock drift
adjustments, please make note of this update and adjust accordingly.

Contact Person(s) Name/Email/Phone Number for Questions: ext. 117 or ext. 129

Web site(s) that contain other relevant information (where applicable): - SOCC morning reports - History of level 1B
notices - All user notices