High-Precision GNSS-Positioning with a Smartphone Considering Its Antenna Phase Center Displacement

Active development of mass-produced devices with dual-frequency microcircuits capable of processing the code and phase signals from global navigation satellite systems (GNSS) opens up new opportunities for high-precision positioning in geodesy. However, the use of smartphones for such tasks is limited by the lack of data on the position of their antenna phase centers. This paper presents the results of an experimental study to determine the location of the average phase center of the GNSS antenna for a Huawei P40 Pro smartphone at the reference point and to evaluate its effect on positioning accuracy using the Precise Point Positioning (PPP) method. The study showed that the antenna’s average phase center is displaced relative to the geometric center of the device by 2.7 cm towards the left edge of the screen, by 1.3 cm deep into the body (from the screen towards the back panel), and by 5.8 cm down from its upper edge. Based on these data, it is possible to correct the systematic positioning errors.