weak gps

My P4P+ controller will not allow me to set the unit as the home location, as it's constantly saying"weak GPS signal" I am in the middle of nowhere no mountains, no buildings, no power lines etc. Running V01.02.01.00 Any help would be appreciated, thanks.

Not the ideal conditions to film due to the very harsh light, but I had to try a first flight in the woods with the DJI Phantom 3 Standard. It was a learning experience ! GPS was very weak and took a few minutes for the drone to acquire signal. Then, when flying, I kept losing GPS signal, so...