Different from the traditional analysis method for gravity anomaly models,DOG(difference of Gauss)spherical wavelet is used to extract the gravity anomaly signals of DTU10,DTU17 and SIO V32.1 models in different bands for Mariana Trench area(140 °E-150°E,10°N-20°N)as an example.The differences between the models are analyzed in depth.An ini-tial attempt of multi-scale analysis in different depths and different resolutions based on RBF(radial basis function)are pro-posed.The results of multi-scale analysis using DOG spherical wavelet show that as the scale becomes smaller,the difference between the models becomes larger.The differences between DTU10 and DTU17 models are mainly concentrated in the band of 10.9-43.6 km,around the coast,trench and submarine mountain,which reflects the contribution of Cryosat-2,Jason-1/GM observation data and FES2014 ocean tide model.Due to the different methods for model construction,the increase of ob-servations and the impact of waveform retracking,the difference between DTU17 and SIO V32.1 models is greater than that between DTU10 and DTU17.The traditional radial basis function is improved,and the multi-scale analysis of radial basis func-tion under multi-depth and multi-spatial resolution is realized.The result is slightly better than that from single-depth and sin-gle-spatial resolution radial basis function.It is expected to be applied to the construction of gravity field model using multi-source data.
维普
万方数据