19991027: GOES Single Chord Operations - Issued 10/27/99 (fwd)

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: 19991027: GOES Single Chord Operations - Issued 10/27/99 (fwd)
• From: Linda Miller <lmiller@xxxxxxxxxxxxxxxx>
• Date: Wed, 27 Oct 1999 12:39:52 -0600

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




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