Topic:
HRPT Transmitter Change
Date/Time(UTC) Message Issued:
13 August 2009, 2045 UTC
Satellite(s) Involved:
NOAA-18
Instrument(s) Involved:
All direct readout
Product(s) Involved/Affected:
All Products direct readout .
Date/Time(UTC) of Initial Implementation:
18 August 2009, Time 0020 UTC
Details/Specifics of Change:
The NOAA/NESDIS Office of Satellite Operations has announced the following:
On 18 August 2009, at 002020Z, the Satellite Operations Control Center (SOCC) will change the HRPT transmitter on NOAA-18 from STX3 to STX2 (note STX2 is LHCP). This is just prior to rev 21867 at Gilmore Creek (Fairbanks). On the same rev, SOCC will start using STX4 for CDA data playbacks. These changes are being made to ensure the quality of the data that is received. They will remain in effect until 1 November 2009.
Near the end of August, NOAA-19 and NOAA-18 will be separated by less than 3 degrees (or 6 minutes) when crossing the equator. With the current configuration, there is concern that the playbacks on N18's STX1 will interfere with the HRPT on N19's STX1 . Additionally, the playbacks on N19's STX3 may interfere with N18's HRPT on STX3. Since N19 is the primary satellite, changes need to be made in NOAA-18's S-band configuration to alleviate RFI and tracking interference at the CDAs..
Contact Person(s) Name/Email/Phone Number for Questions:
Vincent Tabor Vincent.Tabor@noaa.gov 301-817-3882 Level 1B operations support
Carl Gliniak Carl.Gliniak@noaa.gov 301-817-4207 Spacecraft operations support
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