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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 May 22 to June 19, 2002. LUNAR INTRUSIONS 05/23 1219 to 1541 UTC 06/03 2218 to 0108 UTC 06/07 0015 to 0310 UTC BEVEL None SOLAR INTRUSIONS None --------------------------------------- Following are times of GOES-10 single chord operations for the period May 22 to June 19, 2002. LUNAR INTRUSIONS 05/23 1659 to 1952 UTC 06/04 0228 to 0518 UTC BEVEL None SOLAR INTRUSIONS None ------------------------------------------ Tom Renkevens Satellite Analysis Branch (SAB) Satellite Services Division (SSD) NOAA/NESDIS/OSDPD thomas.renkevens@xxxxxxxx
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