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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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