《Table 1 Maximum value of density fluctuation, and fitting residual according to separate inversion

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《3D Joint inversion of gravity and gravity tensor data》

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gxxand gyyare chosen for joint inversion to verify the constraint effect of cross gradient method in horizontal direction.Fig.4 shows the inversion results of separate linear method and the cross gradient method.Table 1 illutrates the maximum densities and the fitting residuals of separate inversion and cross gradient joint inversion with the same iterations.It is indicated that gxxdata has more information in Y direction，and gyydata has more information in X direction.Compared with the separate linear inversion results，the cross gradient inversion results of gxxand gyydata in Fig.4 are with higher accuracy and resolution，especially on the boundary.It proves that the cross gradient method can synthesize information in different directions.