There is also going to be some sort of limit based upon the atmospheric correction that needs to take place to get that sort of accuracy. Light is going to trav

There is also going to be some sort of limit based upon the atmospheric correction that needs to take place to get that sort of accuracy. Light is going to travel (bend) differently through different atmospheric conditions like temperature, pressure, and even composition of the atmosphere in that area. There is also reflectance issues based on the surfaces that are reflecting the light. Clouds and snow are extremely reflective and will need to be corrected for as well in order to not miss out on other parts of the image. I think this may be less of an issue now than in the past with all of the cloud computing capabilities out there, but they still to develop the techniques.