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A research on using SNR values to mitigate carrier phase multipath in GPS surveying

ZHANG Bo1, HUANG Jin song2, SU Lin1( 1. Institute of Remote Sensing Application, Chinese Academy of Science, Beijing 100101,China; 2.Wuhan University, Wuhan 430079, China)  
Because multipath is not spatially correlated, it cannot be canceled with differencing techniques. The bias like multipath remains the dominant error source for differential measurements. According to the fact that the quality of each carrier phase measurement is contained in the signal to noise ration (SNR), a weighting scheme using SNR values with GPS carrier phase observable in the presence of multipath is developed in this paper. This technique for multipath mitigation is verified feasible and reliable by the repeated solutions of experimental data.
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