Observing the earth from the vantage point of space has emerged as an important means to plan our natural resources in a sustainable manner. This book helps readers understand the tradeoffs in selecting various sensor parameters for electro-optical sensors and how each hardware is optimally selected. It provides a detailed account of the activities to be taken to make a camera system space-worthy and various review, test and evaluation plans. The book includes 'case studies' based on the IRS sensors and will be a good companion for a system designer.