GNSS positioning and augmentation.

Technologies

• Multi-constellation, multi-frequency receivers Receivers using GPS, Galileo, GLONASS, BeiDou and regional systems on several frequencies for accuracy and robustness.
• RTK networks and NTRIP Real-time kinematic corrections from reference stations for centimetre positioning.
• PPP and PPP-RTK Precise point positioning from orbit and clock corrections, with or without regional atmosphere models.
• Satellite-based augmentation (SBAS) Wide-area corrections and integrity for aviation and other safety uses.
• Ground-based augmentation (GBAS) Local corrections and integrity for precision approach at airports.
• Geodetic reference frames The coordinate frames positions are expressed in, and the transformations between them.
• Assisted GNSS in cellular networks Network-supplied assistance and hybrid GNSS-cellular positioning for devices.
• Reference stations and GNSS data formats Continuously operating reference stations with standard observation and navigation data exchange.
• Navigation message authentication Cryptographic authentication of broadcast navigation data to resist spoofing.