gpsconst.h

根据GPS官方网站提供的gps定位方法而编写的C语言gps定位代码

#define We              7.292115e-5   /*WGS-84 earth rotation rate*/
#define c               299792458.0   /*WGS-84 speed of light*/
/*WGS 84 value of pi*/
#define pi              3.1415926535898
#define Wedot           7.2921151467e-5
    /*WGS 84 value of earth's rotation rate*/
#define mu              3.986005e+14
    /*WGS 84 value of earth's univ. grav. par.*/
#define F               (-4.442807633e-10)
    /*relativistic correction term constant*/
#if 0
#define OS_DX	( 0.0)
#define OS_DY	( 0.0)
#define OS_DZ	( 0.0)
#define a               6378137.0   /*WGS-84 earth's semi major axis*/
#define b               6356752.31   /*WGS-84 earth's semi minor axis*/
#else
#define OS_DX	( 375.0)
#define OS_DY	(-111.0)
#define OS_DZ	( 431.0)
#define a 		6377563.3960
#define invf 		299.324964600
#define b  	( a * ( ( invf - 1 ) / invf ) )
#endif


#define e1sqr           ((a * a - b * b) / (a * a))
    /*first  numerical eccentricity*/
#define e2sqr           ((a * a - b * b) / (b * b))
    /*second numerical eccentricity*/


#ifndef true
# define true    1
# define false   0
#endif
typedef unsigned char boolean;

typedef double mat96[32][3];
typedef boolean vecb32[32];
typedef long veci32[32];
typedef double vec32[32];
typedef double vec16[16];
typedef double vec8[8];
typedef double vec3[3];
typedef double mat16[4][4];





extern void satpos();
extern void solve();
extern void XYZ2LLA();
extern void LLA2XYZ();