The Calculation of High-Order Vertical Derivative in Gravity Field by Tikhonov Regularization Iterative Method

Figure 10

The second vertical derivative results. (a) The theoretical second vertical derivative. (b) The conventional FFT method after upward extension. (c) The ISVD method. (d) The Tikhonov regularization iteration method.

(a)

(b)

(c)

(d)