I took a flight today and everything was perfect on the preflight check and home point was updated. This was my 4th take off for the day but then when I got about 100 meters away I got and IMU heading error with a Compass error and weak GPS signal but there were 17 satellites then another compass error and an aircraft signal too weak error and she switched to Atti mode. So I turned her around and headed back but then as she was nearly back GPS was back and everything was fine and I continued to fly like normal and back out over the same area I was at no more problems. Has anyone experienced this does it mean I should recalibrate everything even though it was working fine after the problem?