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: http://www.stsci.edu/documents/dhb/web/c10_fgsintro.fm3.html
Дата изменения: Tue Nov 18 00:20:15 1997 Дата индексирования: Sat Dec 22 14:57:21 2007 Кодировка: |
The fundamental time interval for an FGS is 25 milliseconds, the shortest time over which the FGSs can compute a fine error signal or respond to commands. Independent of instrument mode or activity, the DF 224 gathers all FGS data at 25 millisecond intervals, assigns them specific locations in the engineering telemetry stream, and downlinks them to the ground. The engineering telemetry format at the time of transmission determines what FGS data are included in the downlink and the rates at which they are reported.