37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/*
|
||
Functions that calculate the gravitational potential and its first and second
|
||
derivatives for the rectangular prism using the formulas in Nagy et al. (2000).
|
||
|
||
The coordinate system used is that of the article, ie:
|
||
|
||
x -> North y -> East z -> Down
|
||
|
||
References
|
||
----------
|
||
|
||
* Nagy, D., Papp, G., Benedek, J. (2000): The gravitational potential and its
|
||
derivatives for the prism. Journal of Geodesy, 74, 552–560.
|
||
*/
|
||
|
||
|
||
#ifndef _TESSEROIDS_GRAV_PRISM_H_
|
||
#define _TESSEROIDS_GRAV_PRISM_H_
|
||
|
||
|
||
/* Needed for definition of PRISM */
|
||
#include "geometry.h"
|
||
|
||
extern double safe_atan2(double y, double x);
|
||
extern double prism_pot(PRISM prism, double xp, double yp, double zp);
|
||
extern double prism_gx(PRISM prism, double xp, double yp, double zp);
|
||
extern double prism_gy(PRISM prism, double xp, double yp, double zp);
|
||
extern double prism_gz(PRISM prism, double xp, double yp, double zp);
|
||
extern double prism_gxx(PRISM prism, double xp, double yp, double zp);
|
||
extern double prism_gxy(PRISM prism, double xp, double yp, double zp);
|
||
extern double prism_gxz(PRISM prism, double xp, double yp, double zp);
|
||
extern double prism_gyy(PRISM prism, double xp, double yp, double zp);
|
||
extern double prism_gyz(PRISM prism, double xp, double yp, double zp);
|
||
extern double prism_gzz(PRISM prism, double xp, double yp, double zp);
|
||
|
||
#endif
|