20000713: Single Chord Ops-ADMIN NOTICE NOUS40 KWBC (fwd)

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387
NOUS40 KWBC 131218
FOS/NOAAPORT NOTICE NO. 1740     JULY 13... 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/APOSTROPHE/S LIGHT REFLECTING
INTO THE EARTH SENSOR.

FOLLOWING ARE TIMES OF GOES-8 SINGLE CHORD OPERATIONS FOR THE
PERIOD JULY 10... 2000 TO AUGUST 08... 2000.

LUNAR INTRUSIONS

07/21          1923 TO 2214 UTC
08/03          0237 TO 0917 UTC

BEVEL

08/07          0237 TO 0707 UTC
08/08          0237 TO 0707 UTC

SOLAR INTRUSIONS

NONE

FOLLOWING ARE TIMES OF GOES-10 SINGLE CHORD OPERATIONS FOR THE
PERIOD JULY 10... 2000 TO AUGUST 08... 2000.

LUNAR INTRUSIONS

07/20          2246 TO 0137 UTC
07/24          0100 TO 0402 UTC
08/03          0713 TO 1322 UTC

BEVEL

07/31          0713 TO 1153 UTC
08/01          0713 TO 1153 UTC
08/02          0713 TO 1153 UTC
08/04          0713 TO 1153 UTC
08/05          0713 TO 1153 UTC
08/06          0713 TO 1153 UTC
08/07          0713 TO 1153 UTC
08/08          0713 TO 1153 UTC

SOLAR INTRUSIONS

NONE

TOM RENKEVENS
SATELLITE ANALYSIS BRANCH /SAB/
SATELLITE SERVICES DIVISION /SSD/
NOAA/NESDIS
THOMAS.RENKEVENS/AT SYMBOL/.GOV
END
NNNN


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