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Satellite Reception of Reentry Vehicle Telemetry
AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING
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This thesis is intended to be a tool for planners of a reentry vehicle to satellite telemetry link. However, it may be a useful resource to anyone interested in satellite communications, especially those who wish to examine the S-band capability of the Tracking and Data Relay Satellite TDRS. The thesis should be a stand alone reference for a general overview of the problems concerned. Most of the major problems involved in establishing a telemetry link have been set forth in this one source. The reader is briefed on each problem in sufficient detail to gain some insight as to how the problems affect the quality of the link, how the problems are related to each other, and some of the tradeoffs that can be performed. A broad range of antenna and transmitter combinations are examined, and their performances are compared. Specifically, this thesis examines free space loss, rain loss, gain and 3 dB beamwidth of parabolic, slot, and diploe antennas, parabolic antenna footprint on the Earth, the concept of received signal strength, reentry vehicle and satellite characteristics, increasing transmit power, varying frequency from 1 to 10 GHz, increasing antenna efficiency, and increasing receiver sensitivity.
APPROVED FOR PUBLIC RELEASE