This paper proposes techniques for calibrating the biases in range and angle tracking. By means of tracking two satellites in parallel and determining their orbits together, we solve all relevant bias parameters as unknown parameters in the orbit determination. If one satellite is tracked, temporarily changing the satellite's longitude to the tracking station's longitude enables the station's bias parameter or parameters to be solved. The bias parameters of any other stations can likewise be solved, and the satellite is then returned to its operational longitude. These method work both for ranging using two stations and for range-angle tracking at a single station. Eliminating the tracking biases in this way leads to accurate orbit determinations, which will then contribute to navigation services using geosynchronous satellites and will improve the control of "overcrowded" geosynchronous orbits.
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