"GNSS-Stylus" using 3 u-blox ZED-F9P modules (1 RTK-base and 2 rovers)

Experimenting with high-precision GNSS-modules (u-blox ZED-F9P) - Part 1 This system consists of 3 modules, one working as a base and other 2 as rovers. Position of the two rovers is used to calculate the position of the "stylus tip". Communication with the devices and logging of the data is done with application running on a laptop the ZED-F9P-modules are connected to using USB. Some of the post-processing (creating point clouds and "movie script" for Processing) was also done using the same application. CGI-videos on the upper right and lower left were created using Processing. There was a big tree right next to this setup (including base) and buildings, shadowing the GNSS-signals. Also for this kind of vertical setup, antennas should be tilted relative to the stylus so they would be in more horizontal orientation. These devices, however seem to work quite well even in these non-ideal conditions. Source code (QT, Windows) for the SW used to communicate with the u-blox-devices avai