More than the free tools. A fraction of the lab price.

Pick a free tool — when GPS L1, a file you replay, and compiling C yourself are all acceptable — suitable for single-constellation work, or receiver-baseband R&D with SignalSim.

Pick a lab instrument — when you need certified, traceable fidelity, every band and constellation, or a vendor SLA — and the budget is there.

Pick AnyLocate — when you need more than the free tools give — multiple constellations, real-time moving trajectories, record & replay, a GUI and support — but not a lab-grade procurement. Roughly 95% of a professional simulator's real-world capability — the software is free to start, with an SDR from about $150.

What is the best free GPS signal simulator?

For GPS L1 C/A, gps-sdr-sim is the default — it builds an I/Q file you replay through an SDR. For multi-constellation receiver-baseband work, SignalSim is stronger. Both are free and unsupported, both are source you compile yourself, and both stop short of turnkey real-time RF output — that is where AnyLocate picks up.

Do I need a Spirent or Safran to test more than one constellation?

No. Those lab instruments are the fidelity and traceability reference and cost from about US$30,000 up. For most bench GNSS testing, AnyLocate generates GPS, BeiDou, Galileo and GLONASS in real time on a commodity SDR at roughly 95% of a professional simulator's real-world capability — the software is free to start, with an SDR from about $150.

Is AnyLocate free to start?

Yes — AnyLocate has a free tier. You install it and drive an SDR you already own (from about $150); paid tiers add capability as your work needs it. So the real question is not free versus paid, but how much capability you need.

TRY IT

Test it against your own receiver

Download AnyLocate, pair it with an SDR you already own, and see the multi-constellation, real-time signal on your bench.