We'll be using multi-spectral analysis in our mapping of Mars and the asteroids, which was pioneered in those days.
I used something similar, in a document restoration with a scanner, by selecting the frequency of light to which I wanted the scan to be sensitive. It worked.
I spent most of the mid-day today listening to the History channel and it's take on the space program, from it's inception pre-WWII to today. It was really quite well done.
Of course, I was only able occasionally to WATCH it. But if it comes on again (which I'm sure it will) I'll be sure to watch.
Yep...I cataloged some of those papers today...They were just learning how much they could learn via different types of film, and had testing areas in Georgia, the Black Hills, and in Oregon and Arizona where they were trying out spectral analysis, pictures taken at different scales, early computer modeling, and various other things. Pretty neat, although I don't have time to read these things in depth. They were playing with pics taken by the Apollo program, high altitude and lower altitude aerial photography, experimenting with sampling, and various other things. We've come a long way since those days, but they were really pioneers in this type of remote sensing.