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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 December 19, 2000 to January 17, 2001. LUNAR INTRUSIONS 01/01 0822 to 1112 UTC 01/04 1033 to 1324 UTC 01/13 1919 to 2209 UTC 01/16 2142 to 0045 UTC BEVEL NONE SOLAR INTRUSIONS NONE --------------------------------------- Following are times of GOES-10 single chord operations for the period December 19, 2000 to January 17, 2001. LUNAR INTRUSIONS 01/01 1229 to 1519 UTC 01/04 1441 to 1733 UTC 01/13 2324 to 0217 UTC BEVEL NONE SOLAR INTRUSIONS NONE ------------------------------------------ Tom Renkevens Satellite Analysis Branch (SAB) Satellite Services Division (SSD) NOAA/NESDIS thomas.renkevens@xxxxxxxx [End of message from WXSAT-L] ---------- End Forwarded Message ----------
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