They are simply known as a user interface to any Global Navigation Satellite System (GNSS). A GNSS receiver is an electronic device that processes digital signals as soon as the system receives it. These signals are diverted by a GNSS satellite constellation in order to provide position, velocity and time. Any satellite SIS signal that travels in space (transmitted by different satellites) are received and measured by the GNSS Receivers.
The data extracted from the GNSS receivers is used by an extensive range of applications. Especially those applications that rely on receiver's navigation solution which includes computed Position, Velocity and Time (PVT).
How a GNSS Receiver Works?
Being pretty effective for networking and communication, the GNSS receivers measure signals by a single antenna. This antenna also splits to detect identical signals in the space. Each of the digital signal carries a navigation message and it’s receiving position or axis.