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Abstract. GNSS-MR technology inverts snow depth by using low-altitude SNR data. This information contains rich surface information. Due to the complex surface environment, the signal received by the receiver contains noise,during snow depth inversion, it is not possible to extract relatively "pure" snow information. Therefore, the wavelet denoising method is used to compare with the traditional polynomial. The results show that the snow depth RMSE of the polynomial inversion is 8cm and thedoi:10.5194/isprs-archives-xlii-3-w10-249-2020 fatcat:qfjknek5hzetll7ur7dxc6h2oy