JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• 1. To explain the basic principle of GPS and its operation.
• 2. To make the students to understand signal structure, errors, coordinate systems
• 3. To make the students understand the GPS navigation and observation files and compute the position.
• 4. Highlight the importance of integrating GPS with other systems.
• 5. To demonstrate the principle of DGPS and to facilitate the various augmentation systems.

Course Outcomes

Student will be able to:

• 1. Frame various coordinate systems for estimating position.
• 2. Estimate the various errors and their effect on position estimation.
• 3. Use GPS in various fields such as navigation, GIS etc.
• 4. Apply DGPS principle and can also analyze various augmentation systems.

UNIT - I

GPS fundamentals: INS, Trilaiteration, Hyperbolic navigation, Transit, History of GPS, GPS principle of operation, architecture, operating frequencies, orbits, Keplerian element, Solar and Siderial days, GPS and UTC Time, basic steps involved in Satellite position determination.

UNIT - II

GPS Signals: Signal structure, C/A and P-Code, SPS and PPS services, Need of Coordinate system, Earth Centered Inertial (ECI), Earth Centered Earth Fixed (ECEF) coordinate systems and WGS 84 and Types of GPS Receivers, link budget, Selective availability

UNIT - III

GPS Errors: Ionospheric error, Tropospheric error, Ephemeris error, Clock errors, Satellite and receiver instrumental biases, multipath, Various DOPs, Spoofing and Anti-spoofing; GPS Modernization: New Signals, New Satellites and Control Segment: their benefits, Klobuchar model.

UNIT - IV

GPS data processing, DGPS and Applications: RINEX Navigation and Observation data formats, Ambiguity resolution, cycle slips, Position estimation, Principle of operation of DGPS, architecture and errors, Applications of GNSS.

UNIT - V

Other Constellations and Augmentation systems: Other satellite navigation constellations: GLONASS, GALILEO, NavIC, QZSS, BEIDOU, Comparison of various satellite navigation constellations, Types of augmentation systems, Wide area augmentation system (WAAS) architecture, GPS Aided GEO Augmented Navigation (GAGAN), Ground Based Augmentation System (GBAS): Local Area Augmentation System (LAAS) concept, Relative advantages of SBAS and GBAS.

TEXT BOOKS:

• 1. B. Hofmann Wollenhof, H. Lichtenegger, and J. Collins - GPS Theory and Practice, Springer Wien, New York, 2000.
• 2. Pratap Misra and Per Enge, - Global Positioning System Signals, Measurements, and Performance, Ganga-Jamuna Press, Massachusetts, 2001.

REFERENCE BOOKS

• 1. Ahmed El-Rabbany, - Introduction to GPS, Artech House, Boston, 2002.
• 2. Bradford W. Parkinson and James J. Spilker -Global Positioning System: Theory and Applications, Volume II, American Institute of Aeronautics and Astronautics, Inc., Washington, 1996.
• 3. Elliot D. Kaplan -Understanding GPS Principles and Applications, Artech House Boston, 1996.
• 4. A. Leick - GPS Satellite Surveying, John Wiley and sons, 1990. M.TECH.- I YEAR- I SEMESTER MICROWAVE AND RADAR ENGINEERING