Spherical harmonic coefficients of the CGGLM global lithospheric magnetic field model and the 3DSS regional aeromagnetic model

This dataset contains the model coefficients of two complementary magnetic field models developed for lithospheric magnetic field studies: CGGLM (China-specific Global Gradient Lithospheric Magnetic Model): spherical harmonic (Gauss) coefficients up to degree 140. The model was derived by combining along-track and instantaneous gradient data from the MSS-1, CHAMP, and Swarm-A/C satellites with upward-continued aeromagnetic model data from China. The coefficients are provided in a plain text file with columns: n, m,gₙᵐ, and hₙᵐ. 3DSS regional aeromagnetic model: model coefficients and grid data derived from near-surface (1 km altitude) aeromagnetic surveys over mainland China, using the three-dimensional surface spline (3DSS) method. File structure: CGGLM_coff.mat – spherical harmonic coefficients of the CGGLM model for MATLAB coe_mssdata4.mat – coefficients of the regional 3DSS aeromagnetic model for MATLAB CGGLM_coff.xlsx – spherical harmonic coefficients of the CGGLM model coe_mssdata4.xlsx – coefficients of the regional 3DSS aeromagnetic model Contact: Yan Feng ([e-mail])