What is remote sensing? What is it good for, and what do we need to know about it? R. C. Olsen of the Naval Postgraduate School addresses these questions focusing primarily on imaging systems that are of interest in military applications. This book is an eclectic description of the technologies and underlying physics for a wide range of remote sensing systems, including optical, thermal, radar, and lidar. With generous use of full-color graphics, an interesting and diverse set of applications are illustrated which, in many cases, are not found in current remote sensing textbooks.