GNSSvastuvõtjad

GNSSvastuvõtjad, or GNSS receivers, are electronic devices that determine the position, velocity, and time of an object by receiving and processing signals from Global Navigation Satellite Systems. These systems include well-known constellations such as GPS (United States), GLONASS (Russia), Galileo (European Union), and BeiDou (China).

A GNSS receiver works by measuring the time it takes for signals transmitted from multiple satellites to reach the receiver. Each satellite transmits a unique code and precise timing information. By calculating the distance to at least four satellites, the receiver can trilaterate its position in three dimensions (latitude, longitude, and altitude) and also determine its precise time. The accuracy of the position depends on various factors, including the number of visible satellites, atmospheric conditions, multipath effects (signal reflections), and the quality of the receiver's antenna and internal processing.

GNSS receivers are integral to a wide array of applications. They are fundamental in navigation for vehicles, ships, and aircraft. Surveyors use them for highly accurate mapping and land measurement. They are also crucial for geodetic studies, precise timing in telecommunications networks, agriculture for precision farming, and in mobile devices for location-based services. Advancements in GNSS technology continue to improve accuracy, reliability, and the integration of multiple satellite systems and augmentation services.