The process whereby information about an object, manmade or natural, can be obtained remotely or without directly encountering it is known as remote sensing. It has great significance in military as well as geographic and commercial endeavors. It generally includes satellites and aircraft based sensors to root out information about objects present in the deep sea, atmosphere, etc. This book presents the complex subject of remote sensing in the most comprehensible and easy to understand language. It includes a detailed explanation of the various concepts and applications of the field. Some of the diverse topics covered in it address the varied branches that fall under this category. This textbook will serve as a valuable source of reference for those interested in remote sensing.