Version 0.5.0 of the General Astrodynamics Library has been released. It can be downloaded from the project website here:
http://homepage.mac.com/pclwillmott/GAL/index.html
Updates in this release:
** Additional routines added to Kepler sub-library
** Planetary and Moon rotational elements added
** Reference frame routines for planets other than Earth
** Acceleration due to Solar Radiation Pressure added
** Acceleration due to Atmospheric Drag added
** Sun occulation routine added for satellite eclipses
** Support for Harris-Priester Earth Atmosphere Model
** Mars date and time routines added
** Ellipsoid models for the planets and the Sun added
** Earth satellite rise/set routine added.
The Reference Manual will be updated shortly.
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 260 functions in total with an extensive test suite.
Paul Willmott, VP9MU AMSAT-BDA