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635 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 NNNN ---------- End Forwarded Message ----------
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