#ifndef __rockflight_h__
#define __rockflight_h__


/* universal gravitational constant */
#define UGC 6.672e-11
/* earth angular velocity */
#define WE 7.27e-5   
/* square of earth angular velocity */
#define WE2 5.28529e-9
/* earth mass */
#define ME 5.98e24

/* earth radius */
#define EARTH_RAD    6.3567668e6

#endif __rockflight_h__