Abstract:Based on GPS Doppler velocity determination, we compare the error sources between stand-alone GPS velocity and relative GPS velocity, and analyze the influence of these errors on accuracy using GPS broadcast ephemeris. Then, experiments are carried out with static and low-dynamic data. The results show that in static environments the baseline distance is about 600 km, the accuracy of standalone velocity and relative velocity both can achieve a level of cm/s using raw Doppler, and the RMS of stand-alone velocity is lower than that of relative velocity. The accuracy of stand-alone velocity and relative velocity can achieve a level of mm/s using carrier phase-derived Doppler, and the RMS of relative velocity is lower than that of stand-alone velocity. In low-dynamic environments, the accuracy of stand-alone velocity and relative velocity both can achieve a level of dm/s using raw Doppler, and they can achieve a level of cm/s using high-frequency carrier phase-derived Doppler.
LI Lele,HE Kaifei,WANG Zhenjie et al. Error Comparison and Accuracy Analysis between Stand-Alone and Relative Velocity Determination Using GPS[J]. jgg, 2019, 39(10): 1063-1069.