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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 October 25, 1999 to November 23, 1999. LUNAR INTRUSIONS 11/07 0229 to 0707 UTC 11/18 1106 to 1358 UTC BEVEL 10/25 0237 to 0707 UTC 10/26 0237 to 0707 UTC 10/27 0237 to 0707 UTC 10/28 0237 to 0707 UTC 10/29 0237 to 0707 UTC 10/30 0237 to 0707 UTC 10/31 0237 to 0707 UTC 11/01 0237 to 0707 UTC 11/02 0237 to 0707 UTC 11/03 0237 to 0707 UTC 11/04 0237 to 0707 UTC 11/05 0237 to 0707 UTC 11/06 0237 to 0707 UTC 11/08 0237 to 0707 UTC 11/09 0237 to 0707 UTC 11/10 0237 to 0707 UTC 11/11 0237 to 0707 UTC SOLAR INTRUSIONS NONE --------------------------------------- Following are times of GOES-10 single chord operations for the period October 25, 1999 to November 23, 1999. LUNAR INTRUSIONS 11/18 1515 to 1807 UTC 11/21 1106 to 1358 UTC BEVEL 10/25 0713 to 1153 UTC 10/26 0713 to 1153 UTC 10/27 0713 to 1153 UTC 10/28 0713 to 1153 UTC 10/29 0713 to 1153 UTC 10/30 0713 to 1153 UTC 10/31 0713 to 1153 UTC 11/01 0713 to 1153 UTC 11/02 0713 to 1153 UTC 11/03 0713 to 1153 UTC 11/04 0713 to 1153 UTC 11/05 0713 to 1153 UTC 11/06 0713 to 1153 UTC 11/07 0713 to 1153 UTC 11/08 0713 to 1153 UTC 11/09 0713 to 1153 UTC 11/10 0713 to 1153 UTC 11/11 0713 to 1153 UTC 11/12 0713 to 1153 UTC SOLAR INTRUSIONS NONE ------------------------------------------ Steve Arnett Satellite Analysis Branch (SAB) Satellite Services Division (SSD) NOAA/NESDIS steve.arnett@xxxxxxxx --------------------------- End Of Message ----------------------------------- ---------- End Forwarded Message ----------
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