Abstract
Recently the activities for the development of micro- and nano- satellites like a cubesat are being increased. A lot of satellites are operated at a ground station located in a university, but public orbit information is used for satellite tracking, and sometimes the tracking will be failure because the release frequency of orbit is not sufficient. In this paper, the orbit determination system is constructed using observations of Doppler frequency at a low-cost receiving instruments. The evaluation test by two-station observations at Japan and Germany for a 430-MHz cubesat was carried out, and the reasonable performance was confirmed, in which the position error is 9.5 km, the azimuth error is 0.26 deg and the elevation error is 0.12 deg in RMS each.
