My first oddity today after 20+ successful flights. This was a distance from where I last flew so I compass calibrated. No probs, all green. Waited for GPS, waited, waited. Phone said 0 satellites, on a bright almost cloudless day. Picked up the Phantom to peer underneath at the lights - as I tilted it to have a look the steady green lights went to orange. This time it took 2 tries to calibrate. But then still no satellites. I switched everything off and started again. Same story. I didn't dare fly. What illness could this be do you think? I should add that I always get 8 or 9 satellites at this wide open location with no metal for hundreds of yards.