This book comprehensively deals with the fundamentals of Global Navigation Satellite Systems (GNSS). Extensive discussion on GPS, Galileo and Satellite Based Augmentation (SBA) systems are given in the text. Inclusion of relevant topics like Communication Satellites, Multiple Access Techniques, Geoinformatics and GPS Based Surveying makes it more useful for the students pursuing course on GPS, GNSS and related courses. A large number of solved examples, practice questions and objective type questions are provided to gain greater insight into the subject. Salient Features  Comprehensive coverage on satellite navigation systems including GPS, GLONASS and GALILEO Vivid discussion on Satellite Based Augmentation Systems including WAAS, EGNOS, MSAS and GAGAN Extensively deals with GPS Receiver Signal Processing, Orbital Dynamics and Positioning & Co-ordinate Transformation Crisp overview of Geoinformatics, Communication Satellites, Multiple Access Techniques and Surveying using GPS Pedagogy: Solved examples: 67 Practice questions: 283 Objective type questions: 200 Numerical questions : 55 Open book exam questions: 25