In astronomy a rough formula for computing resolution (usually taken as the ability to separate a pair of stars) is: resolution in arc-seconds = 4.57/aperture in inches. If I take the spacecraft height to be a minimum of 200 miles (that's probably the lowest), the resolution is .059 arc-seconds which equates to (if I did my math right) a resolution just under 4". It's hard to imagine this could be achieved looking through the earth's atmosphere....the same problem as astronomers have looking in the opposite direction. Nothing classified about that formula. The constant of 4.57, IIRC, has wavelength folded into it....yellow I think.