NOAA-17 Clock Update, 27 March 2003 - Issued: 21 March 2003; 2145 UTC

4:44 PM
Subject: NOAA-17 Clock Update, 27 March 2003 - Issued: 21 March 2003; 2145 UTC

SOCC Spacecraft Clock Update

Date/Time(UTC) Message Issued:
21 March 2003, 2145 UTC

Satellite(s) Involved:

Instrument(s) Involved:

Product(s) Involved/Affected:

Date/Time(UTC) of Initial Implementation:
27 March 2003/2359 UTC

Details/Specifics of Change:
The Satellite Operation Control Center (SOCC) plans to subtract 75
milliseconds (ms) from both the control and non-control CPU command clocks.
This is being done to keep the clock drift offset to less than 1 pixel to
support AVHRR requirements of +/- 75 ms. Direct readout data users should
take appropriate action if you are including clock adjustments in your
processing. No action is required for level 1B data users, unless you are
not making additional clock adjustments within your data process.

Contact Person(s) Name/Email/Phone Number for Questions: ext. 117 or
Cecil Paris@noaa/301-457-5247 ext. 129

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

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