June 23, 2008

Version 0.3.0 Released

Version 0.3.0 of the General Astrodynamics Library has been released. It can be downloaded from the project website here:


Updates in this release:

ODE Integrator sub-library created.

Lunar position and velocity routine added to ephemerides sub-library. Routine implements LUNAR SOLUTION ELP version ELP/MPP02

Solar position and velocity routine added to ephemerides sub-library.

Acceleration from spherical harmonics routine added to gravity sub-library.

Many routines updated for internal compatibilty with the upcoming official IAU SOFA C library. R-matrices have had indicies reversed compared to GAL 0.2 and earlier.

Work will now be started on the classical keplerian models, and atmosphere models.

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 225 functions in total with an extensive test suite.

Paul Willmott, VP9MU