viiteasema

A viiteasema, translated as reference station or base station, is a crucial component in various positioning and surveying systems. It is a stationary receiver that continuously logs satellite signals from global navigation satellite systems (GNSS) such as GPS, GLONASS, Galileo, and BeiDou. This continuous data logging allows for the precise determination of the viiteasema's coordinates.

The primary function of a viiteasema is to provide a highly accurate and stable reference point. This reference is then used to correct errors and improve the accuracy of measurements made by mobile receivers, often referred to as rovers. These errors can arise from various sources, including atmospheric delays, satellite clock errors, and orbital inaccuracies. By comparing the satellite signals received by the rover with those received by the viiteasema, these errors can be effectively mitigated.

Viiteasemat are fundamental to technologies like Real-Time Kinematic (RTK) surveying, where centimeter-level accuracy is achieved in real-time. They are also used in post-processing kinematic (PPK) surveys and in the establishment of national geodetic networks. The data collected by a viiteasema can be used for a wide range of applications, including construction, land surveying, precision agriculture, and scientific research requiring accurate spatial data. The density and distribution of viiteasemat can vary depending on the specific application and the desired level of accuracy across a given area.