20000411: GOES Single Chord Ops-ADMIN NOTICE NOUS40 KWBC (fwd)

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: 20000411: GOES Single Chord Ops-ADMIN NOTICE NOUS40 KWBC (fwd)
• From: Linda Miller <lmiller@xxxxxxxxxxxxxxxx>
• Date: Tue, 11 Apr 2000 12:13:02 -0600

365 
NOUS40 KWBC 111759
FOS/NOAAPORT NOTICE NO. 1647     APRIL 11... 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 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 APRIL10... 2000 TO MAY 09... 2000.

LUNAR INTRUSIONS

04/15          1305 TO 1557 UTC
04/18          1526 TO 1817 UTC
05/03          0234 TO 0707 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

04/10          0237 TO 0707 UTC
04/11          0237 TO 0707 UTC
04/12          0237 TO 0707 UTC
04/13          0237 TO 0707 UTC
04/14          0237 TO 0707 UTC
04/15          0237 TO 0707 UTC
04/16          0237 TO 0707 UTC
04/17          0237 TO 0707 UTC
04/18          0237 TO 0707 UTC
04/19          0237 TO 0707 UTC
04/20          0237 TO 0707 UTC

FOLLOWING ARE TIMES OF GOES-10 SINGLE CHORD OPERATIONS
FOR THE PERIOD APRIL 10... 2000 TO MAY 09... 2000.

LUNAR INTRUSIONS

04/15          1712 TO 2004 UTC
04/18          1932 TO 2223 UTC
04/30          0414 TO 0713 UTC
05/03          0640 TO 1153 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

SOLAR INTRUSIONS

04/10          0713 TO 1153 UTC
04/11          0713 TO 1153 UTC
04/12          0713 TO 1153 UTC
04/13          0713 TO 1153 UTC
04/14          0713 TO 1153 UTC
04/15          0713 TO 1153 UTC
04/16          0713 TO 1153 UTC
04/17          0713 TO 1153 UTC
04/18          0713 TO 1153 UTC
04/19          0713 TO 1153 UTC

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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