This new edition adds the most recent advances in GPS technology, although the overall structure essentially conforms to the former editions. The textbook explains in a comprehensive manner the concepts of GPS as well as the latest applications in surveying and navigation. Description of project planning, observation, and data processing is provided for novice GPS users. Special emphasis is placed on the modernization of GPS, covering the new signal structure and improvements in the space and control segment. Furthermore, the augmentation of GPS by satellite-based and ground-based systems leading to future Global Navigation Satellite Systems (GNSS) is discussed.