SaVi - simulate Starlink, Iridium, Globalstar, O3b, GPS, Galileo and other satellite constellations, modify them, or design your own. Requires Tcl/Tk and Unix libraries; 3D viewing option requires Geomview running on X Window.
Features
- satellites
- OpenGL
- GUI
- Geomview compatibility
- multiple Earth projections
- free
- cross-platform
- 3D

