Topic:
Nitrogen pressure relief
Date/Time(UTC) Message Issued:
25 July 2006, 1715 UTC
Satellite(s) Involved:
NOAA-14
Instrument(s) Involved:
All instruments
Product(s) Involved/Affected:
All Products/no impact expected
Date/Time(UTC) of Initial Implementation:
25 July 2006, Time 1940 UTC
Details/Specifics of Change:
On July 25, SOCC is planning to vent GN2 (nitrogen) gas to reduce pressure. This procedure should be transparent to users however a notification is being issued since the possibility of attitude perturbations exists. This maneuver is being performed, since it is undesirable to go into the Pitch over maneuver test (week of 7 August, no later than 10 August) with the possibility of an autonomous venting event occurring during the maneuver. The venting maneuver will occur in two parts.
On orbit 59652 around 1940 UTC on 25 July, anticipatory torque will be disabled prior to venting to reduce attitude perturbations.
On orbit 59655 around 0028 UTC on 26 July, GN2 low pressure gas will be vented.
Contact Person(s) Name/Email/Phone Number for Questions:
Renee Smith Renee.Smith@noaa.gov 301-817-4117 SOCC operations
Robert Levin Robert.Levin@noaa.gov 301-457-5247 IPD operations monitoring
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/poes/index.htm - SOCC polar satellite status
http://www.oso.noaa.gov/goes/index.htm - SOCC geostationary satellite status
http://www.oso.noaa.gov/daily-news/index.asp - SOCC morning reports
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*
* Emily D. Harrod
* NOAA/NESDIS/OSDPD/IPD
* Computer Operations Branch
* Pre-Product Processing Group
* E/SP11, Federal Building #4, room 0318
* 5200 Auth Road
* Suitland, Maryland 20746-4304
* USA
* voice 301-457-5247 ext 117
* fax 301-457-5199
* email Emily.Harrod@noaa.gov
*
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