A GNSS or GPS simulator is a hardware or software system that creates artificial RF signals identical to those broadcast by satellites. By generating these signals in a controlled way, engineers can test, validate, and develop receivers, navigation systems, avionics, timing devices, and embedded modules without relying on live satellites. Safran’s Skydel-based platforms and GSG-series instruments generate signals from all major global and regional constellations. VIAVI’s GPS simulators deliver multi-channel GPS/Galileo validation with advanced waypoint and record/replay options. These systems allow you to reproduce environmental conditions, simulate high-dynamics, and introduce complex factors such as multipath, atmospheric effects, or degraded signal health. Simulation eliminates weather, location, and regulatory constraints, enabling fully repeatable testing in labs, hangars, and production lines.

GPS is the satellite navigation system operated by the United States. GNSS is the broader term that includes all global and regional constellations: GPS, Galileo, GLONASS, BeiDou, QZSS, and NavIC. A GPS-only receiver uses the U.S. constellation, while a GNSS receiver can access multiple constellations simultaneously for improved robustness and accuracy. Safran’s simulators support all major constellations, including emerging multi-frequency services and LEO-based augmentation signals. VIAVI simulators support GPS and Galileo with SBAS augmentation such as WAAS and EGNOS. The practical difference for testing is that GNSS-capable simulators allow you to validate performance across multiple systems at once, ensuring devices operate correctly worldwide and under varied orbital geometries.

imulators are used to test and validate any device that depends on satellite signals. Safran’s Skydel-based products support advanced applications such as CRPA testing, space trajectory modelling, high-dynamics scenarios, and multi-antenna systems. The Anechoic and Wavefront systems enable controlled jamming, spoofing, and resiliency testing across multi-element arrays. The GSG-7 and GSG-8 series support PNT system development, timing validation, and production testing. VIAVI’s OSPREY and GPSG-1000 simulators support avionics, ADAS systems, handheld devices, agricultural equipment, mapping tools, and timing receivers with 12-channel multi-constellation capability and SBAS simulation. The GC-130 Antenna Coupler ensures accurate testing in GPS-blocked environments such as aircraft hangars by isolating the aircraft antenna from external signals.

Explore Vicom’s full range of GNSS and GPS simulation solutions from Safran and VIAVI. Whether you need software-defined testing, portable validation tools, multi-antenna CRPA evaluation, or advanced PNT system development, our team can help you choose the right platform and provide technical support throughout the lifecycle of your test program.