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A station with limited motion antenna is usually used for the on-orbit control of a geostationary satellite. In order to
enhance the capability of running a satellite, it is important to improve the orbit determination accuracy of the singlestation
system. This paper presents a method for the orbit determination accuracy improvement with tracking and
ranging data from a single station. This method includes two steps. The first step is improving antenna tracking accuracy
by optimizing step tracking algorithm. Using big antennas or selecting mono-pulse tracking devices were paid more
attention to improve tracking accuracy, which played an important role to reach good orbit determination accuracy in an
orbit measurement campaign of a single station. While the influence of the antenna control unit software on orbit
determination accuracy was neglected. This paper puts forward that the reformed tracking algorithm of the antenna
control unit brings big improvement on tracking accuracy, which is derived from the comparison of orbit measurement
results before and after software updating. The second step is to optimize the parameter settings of the orbit
determination software. Reasonable weighted values are needed for orbit determination when using tracking and ranging
data with different accuracies. Setting the weighted values according to their residual results of the orbit determination
can utilize the measurement data with high precision sufficiently. The principal of 4σ should be adopted in eliminating
limit setting of measurement data, which can make more than 99.98% data available. The orbit determination accuracy
can be improved remarkably through the above method. For example, the orbit determination accuracy of a single station
with a 13m limited motion antenna can achieve three-sigma position accuracy within 2km.
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