I’m flying the phantom V2+ at about 6500 feet in large open area soccer field and getting funny satellite counts. I will start out with a good satellite count of 7 or more and fly for about 8 minutes then start to see red LED’s. The count will go from 6 to 4, then 6, then 7 or more than 4 back and forth with different count but once this starts it seems to get worse. The distance from home is never more them 40 to 50 feet at a height of no more than 50 feet. Has anyone else experience this? Any answers to why the fluxation in satellite counts? Could the GPS mod be marginal?