For pedagogic / scientific diffusion purposes.
F5 to run and create the animation file named 'GPS_constellation &_working_principle_model.gif' that will appear in the same directory as you registered this .m file.
Dashed green lines links show visible spacecrafts (white dots) at a certain time on a certain place on the planet.
Theoritically minimum satellites vsible in the sky to give position and time is 4 (three for position, one for time)
Orbital angle values may be different from reality.
Old piece of code, still suboptimal cause not maximum factorized.
Mathworlds (2021). GPS model animation (https://github.com/NicolasDouillet/gps_model_animation/releases/tag/v1.2), GitHub. Retrieved .
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