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Topic: GOES-9, 10, and 12 Single Chord Operations
Message Issued: July 8, 2004, 1830 UTC
Satellites Impacted: GOES-9, GOES-10, and GOES-12
Products Impacted: GOES-9, GOES-10, and GOES-12 Imager and Sounder Data
Date/Time of Initial Impact: July 9, 2004 0601 UTC
-----------------------------------------
Details:
GOES "single chord" operations, made necessary by lunar and solar
intrusions at the edge of the Earth disk, impact navigation and
registration for short periods. Users of GOES GVAR data will see
variable errors during periods of single chord operations as noted
below.
Single Chord Operations for the Bevel effect are listed when applicable.
Bevel effect operation is intended to avoid a seasonal spacecraft
pointing problem with all GOES spacecraft caused by the sun's light
reflecting into the earth sensor.
Following are times of GOES-12 single chord operations for the period
July 30 to August 3, 2004.
LUNAR INTRUSIONS
July 24 0839 to 1131 UTC
Aug. 05 1941 to 2232 UTC
Aug. 03 1812 to 2103 UTC
SOLAR INTRUSIONS
July 30 0237 to 0707 UTC
July 31 0237 to 0707 UTC
Aug. 01 0237 to 0707 UTC
Aug. 02 0237 to 0707 UTC
Aug. 03 0237 to 0707 UTC
Aug. 04 0237 to 0707 UTC
Aug. 05 0237 to 0707 UTC
Aug. 06 0237 to 0707 UTC
--------------------------
Following are times of GOES-10 single chord operations for the period
July 24 to August 5, 2004.
LUNAR INTRUSIONS
July 24 1244 to 1535 UTC
Aug. 03 2216 to 0107 UTC
SOLAR INTRUSIONS
July 31 0713 to 1153 UTC
Aug. 01 0713 to 1153 UTC
Aug. 02 0713 to 1153 UTC
Aug. 03 0713 to 1153 UTC
Aug. 04 0713 to 1153 UTC
Aug. 05 0713 to 1153 UTC
--------------------------
Following are times of GOES-9 single chord operations for the period
July 9 to August 3, 2004.
LUNAR INTRUSIONS
July 09 0601 to 0851 UTC
July 21 1523 to 1814 UTC
Aug. 03 0220 to 0511 UTC
SOLAR INTRUSIONS
July 29 1110 to 1550 UTC
July 30 1110 to 1550 UTC
July 31 1110 to 1550 UTC
Aug. 01 1110 to 1550 UTC
Aug. 02 1110 to 1550 UTC
Aug. 03 1110 to 1550 UTC
Aug. 04 1110 to 1550 UTC
Aug. 05 1110 to 1550 UTC
Aug. 06 1110 to 1550 UTC
------------------------------------------
Contact Information:
Brian Hughes
Satellite Services Division
NOAA/NESDIS/OSDPD
301-763-8051 x106
brian.hughes@xxxxxxxx
See http://www.ssd.noaa.gov/PS/SATS/messages.html for this and other
satellite related messages.
See http://www.ssd.noaa.gov for full GOES scanning schedules.
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