Abstract:GPS-IR is a new remote sensing technology based on satellite reflection signals. The inversion of soil moisture can be achieved by using satellite reflection signals in SNR observations. Aiming at the problem of satellite reflection signal separation, we propose a satellite reflection signal separation method based on wavelet analysis. Experiments show that wavelet analysis can make corresponding changes to the signal-to-noise ratio observations of different satellites, effectively separating satellite direct signals and obtaining more accurate satellite reflection signals. Linear regression model can well represent relative delay phase and soil moisture. The correlation between the wavelet analysis and the low-order polynomial is more obvious. Therefore, the method can be used as a new method for separating satellite reflected signals.