A decade later the first book was getting dated, the field had grown and I'd learned a lot. In 2007 a second edition came out. It was nearly twice the length covering the field in more detail and much of the newer science. It emphasized the science of remote sensing over the applications to forestry, agriculture etc. which was common to most of the other books available at the time. This had become RIT's niche. We focused on training the scientists and engineers who would build the analytical tools and instruments that other scientists would use.