Measuring noise becomes one of the major factors to influence comparison result precision after correcting each time
delay error in GPS Common View (GPS CV) comparison data. So it is the key to filter and smooth measuring noises of
GPS CV observed data, which affect the precision for GPS CV comparison results directly. In order to eliminate GPS CV
measuring noises, the de-noise mean on wavelet transform was studied. The method of threshold wavelet de-noise is to
use wavelet transform technique to decompose and reconstruct signal with noise, and confine the thresholds of wavelet
coefficients so as to eliminate the noise from signal. This paper presents an application of the wavelet threshold de-noise
to filtering random noise from GPS observed data. The results show that wavelet filtering noise methods are effective and
satisfied in filtering GPS CV measuring noises.