The #1 open-source global navigation satellite system (GNSS) testing app.

Features
It supports dual-frequency¹ GNSS for:

・GPS (USA Navstar)
・GLONASS (Russia)
・QZSS (Japan)
・BeiDou/COMPASS (China)
・Galileo (European Union)
・IRNSS/NavIC (India)
・Various satellite-based augmentation systems (SBAS):

○Wide Area Augmentation System (WAAS) (USA)
○European Geostationary Navigation Overlay Service (EGNOS) (European Union)
○GPS-aided GEO augmented navigation (GAGAN) (India)
○Multi-functional Satellite