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NOUS40 KWBC 271846
FOS/NOAAPORT NOTICE NO. 1727 JUNE 27... 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 DATAWILL 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/APOSTROPHE/S LIGHT
REFLECTING INTO THE EARTH SENSOR.
FOLLOWING ARE TIMES OF GOES-8 SINGLE CHORD OPERATIONS FOR
THE PERIOD JUNE 26... 2000 TO JULY 25... 2000.
LUNAR INTRUSIONS
06/26 2257 TO 0149 UTC
07/09 1004 TO 1255 UTC
07/21 1923 TO 2214 UTC
BEVEL
NONE
SOLAR INTRUSIONS
NONE
FOLLOWING ARE TIMES OF GOES-10 SINGLE CHORD OPERATIONS FOR
THE PERIOD JUNE 26... 2000 TO JULY 25... 2000.
LUNAR INTRUSIONS
06/27 0307 TO 0559 UTC
07/06 1153 TO 1445 UTC /ASTERISK/
07/09 1414 TO 1705 UTC /ASTERISK/
07/20 2246 TO 0137 UTC
07/24 0100 TO 0402 UTC
/ASTERISK/DUE TO A RECENT ORBIT INCLINATION ADJUSTMENT... THE
PREVIOUSLY PREDICTED TIMES FOR THE LUNAR INTRUSIONS ON 07/06
AND 07/09 HAVE CHANGED.
BEVEL
NONE
SOLAR INTRUSIONS
NONE
TOM RENKEVENS
SATELLITE ANALYSIS BRANCH /SAB/
SATELLITE SERVICES DIVISION /SSD/
NOAA/NESDIS
THOMAS.RENKEVENS/AT SYMBOL/NOAA.GOV
END
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