#ifndef CONSTANTS_H_ #define CONSTANTS_H_ namespace Math { static const double PI = 3.1415926535897932384626433; } namespace Earth { static const double OMEGA = 7.2921158553E-5; static const double GRAVITATIONAL_CONSTANT = 3.987095392E14; static const double MEAN_RADIUS = 6371000; } #endif /* CONSTANTS_H_ */