What kind of properties are the sensor specifications?
Just to take a random example, would one of the specifications you would be interested in be the noise level, in the sense that CCD cameras at higher altitudes would be exposed to higher cosmic ray levels? (If so, then altitude is not the only determining factor -- e.g., magnetic field variations due to geographic positions would influence the ozone thickness.)
Are you looking at factors such as the density and thus index of refraction of air? Or is the normal operation of the sensor affected by ambient air pressure? Or is air temperature a factor?
It would help if you were to describe how/why the image would change with altitude.
