Each of our transmitters incorporates a multi-constellation GNSS receiver, enabling the acquisition of comprehensive location data such as date, time, speed, HDOP (Horizontal Dilution of Precision), and time of acquisition. This receiver supports all GNSS constellations, including GALILEO, GPS, GLONASS, BEIDOU, and QZSS.

How does it work ?

A GNSS (Global Navigation Satellite System) receiver works by determining its position on Earth using signals transmitted by satellites.

1. GNSS satellites continuously transmit radio signals.
   These signals contain information about the satellite’s position, the time the signal was transmitted, and other data.
2. The GNSS receiver on your tag get these radio signals. It needs to receive signals from at least 4 satellites to determine its position with latitude, longitude, and altitude.
3. The GNSS receiver measures the time it takes for each signal to travel from the satellite to your tag.
4. Using the time measurements and the speed of light, the receiver calculates the distance to each satellite. Each distance measurement creates a sphere around the satellite, with your tag located somewhere on the sphere’s surface.
5. By combining the distance measurements from at least four satellites, the receiver performs a process called trilateration. Trilateration involves finding the point where the spheres from all the satellites intersect. This intersection point is your tag’s position. The fourth satellite is needed to correct for clock errors in the receiver.