Hi, I was flying somewhere which I flied more than 10 times. At the ground satellite count 19-20. After take of dropped 15. Dropped 4-5 at 150mt height and 550mt distance, Pulled back to home point and found 16-17 satellite again at same height, Flight exactly opposite way to check but again lost GPS signal at the distance of 450mt, Pulled back to home point again but never keep satellite qty stable, A moment 14-15 after that 4-5 First time I had problem with GPS signal. Do you have any idea ?