The last couple times that I took my Q500 out I noticed that it did a lot of drifting to the right mostly in angle mode. I also noticed that instead of a solid green or purple they were blinking starting from lift off to landing. I had good satellite lock with 17 and 18 satellites which is what I think the blinking lights mean when it lacks enough satellites locked in. Is this an indication that my compass needs recalibration? The telemetry shows that I was locked in for the whole flight and the controller shows I was locked in before flight take off.