Ignasi Cairó, Manel Torrentallé Cairó, Luca Venza

Trenchip is an RFID- and GNSS-enabled system for precise positioning of underground pipes. By eliminating digging, it can help prevent accidents and damage.
The use of GPS/Galileo satellite constellations makes it possible to perform Precise Point Positioning (PPP) in urban areas in half the time. Instead of using ionosphere-free combinations (as in traditional PPP), low-noise dual- or triplefrequency pseudo-range combinations are corrected with ionosphere delay information from federated carrier-smoothing (Hatch) ionoestimation filters for each satellite. This method provides for faster re-convergence times and ensures the best possible positioning performance from Galileo.