AN IMPROVED PRISM INTEGRATION FOR GRAVIMETRIC TERRAIN CORRECTION

In terms of a piece by piece Linear polynomial and a linear spline, an improved prism integration Is presented in the paper. In the innermos t area, we divide the prism surface into 8 octants with a constant slo pe, and integrate effects for each element analytically. In the outer zones, the linear approximation is used for a quasi - numerical integr ation of hyperbolic paraboloid surface element. This improved algorith m to some degree provides a more accurate alternative to the simpler a pplication of rectangular prisms without densification.