This is a fork of the excellent Satellite Tracker project by David Suarez.
It adds the ability to simulate basic Radio Frequency Interference (RFI) scenarios for satellites in Earth Orbit. It is intended to help users gain a simple intuition of the interaction between orbital motion and radio transmission requirements.
The underlying model is a simple calculation of Free Space Path Loss on the basis of distance between two isotropic antennas: one aboard the spacecraft and the other located on the Earth's surface. Both the jammer and defender are assumed to be operating in the same frequency and no protocol-level implementation is simulated.
Orbits are propagated using recent data from the Celestrak satellite catalog and the SGP4 implementation from satellite-js library.
Feel free to modify this for your own learning and projects. Some things you might find fun to try implementing:
- Jamming from one ground-station to another with the satellite as the primary transmitter (e.g. GPS jamming)
- Jamming from one satellite to another
- Jamming in near-band frequencies
- The presence of multiple jammers or transmitters
This is a static client-side javascript implementation. Running it should just be a matter of:
cd spacejam-demo/
npm install
npm run startThis has been tested with node v18.4.0, your mileage may vary with other versions.
Most of the relevant physical modeling implementation is contained in engine.js or tle.js. Most of the UI is implemented directly in App.js.