This paper proposes a single-satellite geolocation system to provide three dimensional position for moving vehicles. The elements of this system are single-geostationary satellite, three reference ground stations, control center (data processing center) and many users.The distinctive feature is that this satellite has 50m orthogonal crossed-booms to obtain long interferometry baselines.
L-band signals transmitted by an user are received at each interferometry element. The signals are translated to C-band frequency and downlinked to a control center for data processing. The center keeps a constant watch over signals from three reference stations of known position for calculation of boom deflections including attitude errors and determination of user's position from measured phase differences and compensation data of boom deflections.
In this paper, we discuss the problems of how to eliminate an ambiguity of measured path differences and to compensate for boom deflections. As a result of study, we have confirmed that a position determination accuracy of 200m to 300m is possible in this system.
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