Hacking into DMR+ digital Radio Protocol... Extracting GPS coordinates of transmitting stations of the HYTERA brand

HYTERA is one of the trendy manufacturers of Radio Equipment for DMR+ professional and for amateur radio hobbyist.
Mobile and Handheld radios operating in digital mode and having built in GPS receiver can send their location to other’s listening on the same channel… However it’s not possible to eavesdrop someones location even there is a feature called auto-send (report) own position on a preset interval.
The goal of the project is to analyse the RF, decode the DMR bitstream, and extract GPS info of the callees