Observation of the earth and its environment

"In sum, I believe that every organization active in remote sensing will find Dr. Kramer's book to be an essential addition to its technical library, and I believe that every serious practitioner of remote sensing will find it a permanently useful and vital reference." John H. McElroy , Dean of Engineering, The University of Texas and Chair of the Committee on Earth studies of the U. S. National Research Council's Space Studies Board)