From:
Thu 6:22 PM
Subject: NOAA-14/16/17, Spacecraft Clock Update, 23 December 2003 - Issued: 18 December 2003; 2315 UTC
Resent-From: nesdis.osdpd.ipd.Level-1B.notices@noaa.gov,
nesdis.osdpd.ipd.contractors@noaa.gov
To: undisclosed-recipients:;
Topic:
Spacecraft Clock and Daily ETCUP Updates
Date/Time(UTC) Message Issued:
18 December 2003, Time 2315 UTC
Satellite(s) Involved:
NOAA-14, 16, 17
Instrument(s) Involved:
All
Product(s) Involved/Affected:
AVHRR/possible effect on imagery (pointing precision)
Date/Time(UTC) of Initial Implementation:
23 December 2003, Time 1736 UTC
Details/Specifics of Change:
SOCC has announced their plans to perform spacecraft elapsed time clock
updates and daily ETCUP updates on December 23 to compensate for clock
drift. Updates will be performed as follows:
NOAA-16 - subtract 100 milliseconds (ms) from non-control CPU clock around
2200 UTC; subtract 100 ms from control CPU clock around 2330 UTC; change
daily ETCUP bias to -5.5 ms around 2359 UTC.
NOAA-17 - subtract 100 milliseconds (ms) from non-control CPU clock around
2200 UTC; subtract 100 ms from control CPU clock around 2330 UTC; change
daily ETCUP bias to -3 ms around 2359 UTC.
NOAA-14 - subtract 50 milliseconds (ms) from control CPU clock around 2200
UTC; change daily ETCUP bias to -7 ms around 2300 UTC.
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