Libgal

General Astrodynamics Library

The General Astrodynamics Library GAL is a numerical library for C and C++ programmers. It is free software under the GNU General Public License.

The library provides a wide range of astrodynamical routines such as ephemerides, earth orientation, and orbit propagation. There are over 170 functions in total with an extensive test suit

WWW http//homepage.mac.com/pclwillmott/GAL/