The importance of GNSS receivers in accurate positioning

Global navigation satellite systems are the driver of current-day navigation and geospatial technology, with GNSS receivers playing a central role. The devices are designed to compute satellite signals coming from constellations, including but not limited to GPS, Galileo, and GLONASS, into exact location, velocity, and time information.

A GNSS receiver operates by computing its distance from several satellites and precisely identifying its position by locating itself at the intersection of the resulting lines of position. This procedure works, assuming the receiver and its constellation of satellites have the capability of dealing with interference and/or multipath errors. Nowadays, real-time and high-precision centimetre-level positioning is demanded in several applications, such as survey, construction, agriculture, as well as autonomous vehicle navigation; an approximation of a few centimetres is also usually feasible by the high-performance GNSS receivers.

Various industries require various types of receivers. For example, there is wide use of GNSS handheld receivers by practitioners in the field, hikers, and explorers for accurate navigation in remote terrains. Survey-grade receivers, however, provide advanced features including multi-frequency technologies, real-time kinematic RTK corrections, and millimetre-centimetre-level accurate data logging. In farming and agriculture, GNSS receivers are widely used on farms to improve crop accessibility and maintain food supply chains amid social distancing measures.

Selecting the correct GNSS receiver will greatly depend on the application; does it need the toughest of ruggedness, multi-constellation accuracy, or ultra-high precision? By keeping the receiver and upgrading, you can count on many years of stable results.

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