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NOAA-15, Switch to YGC Mode, 11 September 2003 - Issued: 10 September 2003; 1600 UTC

From:
Wed 11:57 AM
Subject: NOAA-15, Switch to YGC Mode, 11 September 2003 - Issued: 10 September 2003; 1600 UTC
Resent-From: nesdis.osdpd.ipd.Level-1B.notices@noaa.gov,
nesdis.osdpd.ipd.contractors@noaa.gov

Topic:
Switch to YGC mode for 3 orbits

Date/Time(UTC) Message Issued:
10 September 2003, 1600 UTC

Satellite(s) Involved:
NOAA-15

Instrument(s) Involved:
All

Product(s) Involved/Affected:
All products

Date/Time(UTC) of Initial Implementation:
11 September 2003, Time 1615 UTC

Details/Specifics of Change:
The Satellite Operations Control Center (SOCC) issued the following notice:

On 11 September 2003, around 1615 UTC, the NOAA-15 spacecraft will be
commanded to operate in Yaw Gyro Compassing (YGC) attitude control mode
instead of normal attitude control mode. This will last through three
orbits, after which it will be commanded back to normal attitude mode around
1935 UTC. This will be done to provide baseline information on YGC
performance in support of future reduced gyro (RGYO) testing. YGC mode will
be used during the RGYO testing.

Reduction in Yaw pointing precision may occur while in YGC mode. Users may
see a slight change in the accuracy of geolocations while operating in YGC
mode.

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://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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