The shadows appear to be midday allowing measurements from the plane's shadow to its wheels. I don't know plane size so wheels could be 4 to 5 feet tall. I can tell it is not the larger or smaller ones. Estimating from there I get 30-40 feet above ground. I would allow some perspective to account for some difference here, so I'd say it could be up to 80 feet. I highly doubt it is even 100.