20000426: Single Chord Ops-ADMIN NOTICE NOUS40 KWBC (fwd)

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: 20000426: Single Chord Ops-ADMIN NOTICE NOUS40 KWBC (fwd)
• From: Linda Miller <lmiller@xxxxxxxxxxxxxxxx>
• Date: Wed, 26 Apr 2000 07:25:05 -0600

377
NOUS40 KWBC 261314
FOS/NOAAPORT NOTICE NO. 1669     APRIL 26... 2000

ATTENTION    FAMILY OF SERVICES SUBSCRIBERS
             NOAAPORT USERS

SUBJECT      SINGLE CHORD OPERATIONS

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 NOTEDBELOW.

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 APRIL20... 2000 TO MAY 19... 2000.


LUNAR INTRUSIONS

05/03          0234 TO 0707 UTC
05/13          1154 TO 1445 UTC
05/15          1325 TO 1616 UTC
05/16          1410 TO 1701 UTC

BEVEL

04/21          0237 TO 0707 UTC
04/22          0237 TO 0707 UTC
04/23          0237 TO 0707 UTC
04/24          0237 TO 0707 UTC
04/25          0237 TO 0707 UTC
04/26          0237 TO 0707 UTC
04/27          0237 TO 0707 UTC
04/28          0237 TO 0707 UTC
04/29          0237 TO 0707 UTC
04/30          0237 TO 0707 UTC
05/01          0237 TO 0707 UTC
05/02          0237 TO 0707 UTC
05/03          0234 TO 0707 UTC
05/04          0237 TO 0707 UTC

SOLAR INTRUSIONS

04/20          0237 TO 0707 UTC

FOLLOWING ARE TIMES OF GOES-10 SINGLE CHORD OPERATIONS
FOR THE PERIOD APRIL 20... 2000 TO MAY 19... 2000.

LUNAR INTRUSIONS

04/30          0414 TO 0705 UTC
05/03          0640 TO 1153 UTC
05/12          1513 TO 1804 UTC
05/15          1732 TO 2023 UTC

BEVEL

04/20          0713 TO 1153 UTC
04/21          0713 TO 1153 UTC
04/22          0713 TO 1153 UTC
04/23          0713 TO 1153 UTC
04/24          0713 TO 1153 UTC
04/25          0713 TO 1153 UTC
04/26          0713 TO 1153 UTC
04/27          0713 TO 1153 UTC
04/28          0713 TO 1153 UTC
04/29          0713 TO 1153 UTC
05/01          0713 TO 1153 UTC
05/02          0713 TO 1153 UTC
05/03          0713 TO 1153 UTC
05/04          0713 TO 1153 UTC
05/05          0713 TO 1153 UTC
05/06          0713 TO 1153 UTC
05/07          0713 TO 1153 UTC
05/08          0713 TO 1153 UTC
05/09          0713 TO 1153 UTC
05/10          0713 TO 1153 UTC
05/11          0713 TO 1153 UTC

SOLAR INTRUSIONS

NONE

NOTE  THE SINGLE CHORD OPERATION FOR THE BEVEL EFFECT ON
04/30 IS REPLACED BY THE SINGLE CHORD OPERATION FOR LUNAR
INTRUSION EFFECT.

STEVE ARNETT
SATELLITE ANALYSIS BRANCH /SAB/
SATELLITE SERVICES DIVISION /SSD/
NOAA/NESDIS
STEVE.ARNETT/AT SYMBOL/NOAA.GOV
END
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