Subject: Single Chord Operations 10/22/01 to 11/13/01 - Issued 10/22/01
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 22, to November 13, 2001.


LUNAR INTRUSIONS

10/28    1219 to 1531 UTC
10/31    1448 to 1739 UTC
11/10    2340 to 02332 UTC


BEVEL

10/23    0237 to 0707 UTC
10/24    0237 to 0707 UTC
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
11/07    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
11/12    0237 to 0707 UTC
11/13    0237 to 0707 UTC


SOLAR INTRUSIONS

10/22    0237 to 0707 UTC

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Following are times of GOES-10 single chord operations for the period
October 22, to November 13, 2001.


LUNAR INTRUSIONS

10/28    1646 to 1936 UTC
10/31    1852 to 2143 UTC
11/11    0332 to 0640 UTC
11/13    0529 to 1153 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

10/22    0713 to 1153 UTC
10/23    0713 to 1153 UTC
10/24    0713 to 1153 UTC

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