cdata.h

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/* These constants are specified in Fred Patt's cdata.f module. */
 
#ifndef _CDATA_H
#define _CDATA_H
 
#define PI 3.1415926535897932384626433832795029L
#define RADEG (180.0/PI)  /* For radians to degrees conversion */
#define RE 6378.137  /* Earth equatorial radius (km) */
#define REM 6371.0   /* Earth mean radius (km) */
#define FF (1.0/298.257)  /* Earth flattening factor */
#define OMF2 ((1.0 - FF)*(1.0 - FF)) /* One minus flattening, squared */
#define OMEGAE 7.29211585494e-5L /* Earth rotation rate (radians/sec) */
 
#endif