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What is a GNSS receiver?

A GNSS receiver is a device which is capable of receiving GNSS signals in order to determine your (exact) location. GNSS receivers come in all kind of shapes and sizes and different accuracies. In general, GNSS receivers are divided in three classes; recreational, mapping and survey grade receivers. The UNI-GR1 is a so called survey grade GNSS receiver, which means it can achieve centimeter accuracy.