The author, one of the leading authorities in the field of GPS, presents material from the viewpoint of the software receiver, an approach that helps readers better understand the operation and that reflects the expected integration of the GPS receiver into everyday devices such as cell phones. Concentrating on civilian C / A code, this book provides the tools and information needed to understand and utilize all aspects of receiver technology and relevant navigation schemes: * Overview of the basics of GPS and satellite constellation consisting of a GPS system * Detailed examination of GPS signal structure, acquisition and tracking * Step-by-step presentation of mathematical formulas to calculate the user position * Demonstration of using a computer program to run key equations * Instructions for developing hardware to collect digital data to the GPS receiver software * Complete chapter shows a GPS receiver to follow the flow of signals to determine user position Second Edition of this highly acclaimed text has been greatly expanded, including three new chapters: * Acquisition of weak signal * Tracking weak signal * Subject associated GPS receiver Following the expert guidance of writer and easy-to-follow style, engineers and scientists learn everything they need to understand, build, and operate the GPS receiver.