Abstract
A correction method of orbit elements for nano-satellites using simple and low cost facilities is required. In this study, the Doppler shift of the beacon signal from a cubesat was observed using an amateur radio. The history of frequency variation was recorded for different TLEs with different epoch time. The frequency difference translated into seconds (FDTS) was deduced as a ratio of the maximum frequency variation in the pass to the 1s-periodic variation. The FDTS has dependency on TLE. For the old TLE, the FDTS was larger than the new one. Because the FDTS is related to satellite's phase variation in the orbit, the TLE's epoch time was corrected using the measurement result. The FDTS with the observation using the corrected TLE was small.
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