Spirit Super-Sensitive Software GNSS-Receiver is designed for reliable and accurate navigation in difficult conditions. Sensitivity is 10–15 dB better because of complex signal processing and electromagnetic interference (EMI) suppression algorithms. It tracks up to 27 satellites, including GPS and GLONASS, with possible support for future GNSS. It comprises a hardware module with radio front-end, device driver, receiver engine, and user utilities. The module can be as small as 1–2 cm2 (single side mounting). Components include a virtual serial-port driver and navigation engine.