GNSSposities
GNSSposities are the spatial coordinates of a point determined using Global Navigation Satellite Systems (GNSS). A GNSS receiver computes its position by processing signals from multiple satellites that broadcast precise timing and ephemeris data. Constellations such as GPS, GLONASS, Galileo, and BeiDou provide the necessary signals, and modern receivers commonly use pseudorange and carrier-phase measurements to estimate location and receiver clock error.
To determine position, at least four satellites are typically required. The measurements solve for three spatial
Time and reference frames are integral to GNSS positioning. Satellite clocks and the receiver’s time are referenced
Accuracy and error sources vary with conditions. Key factors include atmospheric delays (ionospheric and tropospheric), multipath,
GNSSposities support a wide range of applications, including navigation, surveying, mapping, geodesy, agriculture, and autonomous systems,