SDX is Skydel's GNSS multi-constellation, multi-frequency software-defined simulator. It uses the power of GPU to generate high-quality signals in real time. SDX is flexible and scalable, and features a complete API, advanced jamming, RTK, supports air/land/space vehicle trajectories and much more. SDX is available in many configurations: a variety of turnkey systems, as a software-only, or as custom simulators capable of multi-antenna testing.