Earth orbits and satellite coverage display in 3D on your laptop.
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.
SIGPROC - a collection of signal processing programs developed for
pulsar data reduction has been developed and maintained since 1999.
The package is used to search for and visualize the presence of
pulsed signals in noisy radio astronomy data.