Ah so if no wind speed is corect and if windy it's just estimated speed,confused speed I post above was at night Carm sky's,,,,this one area that annoys me,,that's halve the reason I buy phantoms,,speed to move and explore fast,next drone may as well be a syma toy drone,,if speed incorrect why have it,it just bogs up app and if we questioned on it it's allways in corect,,what up with that,,clearly says it's doing that speed and why do we trust other readings if the speed in corect,,,oh I could talk all day on this but won't spam the forum,,this already gone off topic a bit,but does fit the postings,,
,,,and if vps off how does it calculate ground speed? Airspeed ?