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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-8 single chord operations for the period April 09 to May 01, 2002. LUNAR INTRUSIONS 04/24 1318 to 1610 UTC 04/26 1503 to 1756 UTC BEVEL 04/21 0237 to 0707 UTC 04/22 0237 to 0707 UTC 04/23 0237 to 0707 UTC 04/24 0237 to 0707 UTC 04/25 0237 to 0707 UTC 04/26 0237 to 0707 UTC 04/27 0237 to 0707 UTC 04/28 0237 to 0707 UTC 04/29 0237 to 0707 UTC 04/30 0237 to 0707 UTC 05/01 0237 to 0707 UTC SOLAR INTRUSIONS 04/02 0237 to 0707 UTC 04/03 0237 to 0707 UTC 04/04 0237 to 0707 UTC 04/05 0237 to 0707 UTC 04/06 0237 to 0707 UTC 04/07 0237 to 0707 UTC 04/08 0237 to 0707 UTC 04/09 0237 to 0707 UTC 04/10 0237 to 0707 UTC 04/11 0237 to 0707 UTC 04/12 0237 to 0707 UTC 04/13 0237 to 0707 UTC 04/14 0237 to 0707 UTC 04/15 0237 to 0707 UTC 04/16 0237 to 0707 UTC 04/17 0237 to 0707 UTC 04/18 0237 to 0707 UTC 04/19 0237 to 0707 UTC 04/20 0237 to 0707 UTC --------------------------------------- Following are times of GOES-10 single chord operations for the period April 09 to May 01, 2002. LUNAR INTRUSIONS 04/26 1908 to 2159 UTC BEVEL 04/21 0713 to 1153 UTC 04/22 0713 to 1153 UTC 04/23 0713 to 1153 UTC 04/24 0713 to 1153 UTC 04/25 0713 to 1153 UTC 04/26 0713 to 1153 UTC 04/27 0713 to 1153 UTC 04/28 0713 to 1153 UTC 04/29 0713 to 1153 UTC 04/30 0713 to 1153 UTC 05/01 0713 to 1153 UTC SOLAR INTRUSIONS 04/02 0713 to 1153 UTC 04/03 0713 to 1153 UTC 04/04 0713 to 1153 UTC 04/05 0713 to 1153 UTC 04/06 0713 to 1153 UTC 04/07 0713 to 1153 UTC 04/08 0713 to 1153 UTC 04/09 0713 to 1153 UTC 04/10 0713 to 1153 UTC 04/11 0713 to 1153 UTC 04/12 0713 to 1153 UTC 04/13 0713 to 1153 UTC 04/14 0713 to 1153 UTC 04/15 0713 to 1153 UTC 04/16 0713 to 1153 UTC 04/17 0713 to 1153 UTC 04/18 0713 to 1153 UTC 04/19 0713 to 1153 UTC 04/20 0713 to 1153 UTC ------------------------------------------ Tom Renkevens Satellite Analysis Branch (SAB) Satellite Services Division (SSD) NOAA/NESDIS/OSDPD thomas.renkevens@xxxxxxxx
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