Dead reckoning of phone trajectory using inertial sensor (of the phone) + gps corrections ? I don't see a dedicated camera on the drone (using gopro for machin

Dead reckoning of phone trajectory using inertial sensor (of the phone) + gps corrections ? I don't see a dedicated camera on the drone (using gopro for machine vision is not ideal), nor a beefy cpu to handle person tracking onboard, but I could be mistaken.