Global Navigation Satellite Systems

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Global Navigation Satellite Systems

4-Day Course

$2190 per person


A thick swarm of radionavigation satellites – at least 128 of them! -- will soon be orbiting our home planet. They will be owned and operated by six different sovereign nations hoping to capitalize on the technical and financial success of America’s highly successful GPS. In this comprehensive fourday short course Tom Logsdon will describe in detail how these various international navigation systems work and he will review the many practical benefits they are providing to civilian and military users scattered around the globe. He will also describe the salient features of each navigation system, describe its signal structure, and explain how you can use it most effectively in practical situations.

Read instructor's GPS tutorials.

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  1. International Radionavigation Satellites. The American GPS. The Russian Glonass. The European Galileo. The Chinese Biedou. The Indian IRNSS. The Japanese QZSS. Geosynchronous overlay satellites.

  2. Radionavigation Concepts. Active and passive radionavigation systems. Positions and velocity solutions. Split-spectrum technologies. and Maintaining nanosecond timing accuracies. Today’s spaceborne atomic clocks. Websites and other sources of information.

  3. Introducing the GPS. Signal structure. Modulation techniques. Performance-enhancements. Relativistic time dilations. Inverted navigation solutions.

  4. Russia’s Highly Capable Glonass Constellation. Real-world performance capabilities. Orbital mechanics considerations. The major Glonass subsystems. Russia’s SL-12 Proton booster. Building dual-capability GPS/Glonass receivers.

  5. Navigation Solutions and Kalman Filtering Techniques. Taylor series expansions. Numerical iteration. Constructing practical Kalman filters.

  6. Designing Radionavigation Receivers. Passive and active antennas. Code tracking and carrier tracking loops. Commercial chipsets. Military receivers. Precise Navigation solutions for orbiting satellites.

  7. Military Applications. Tactical and strategic warfighting capabilities.. Autonomy and survivability enhancements. Smart bombs and artillery projectiles. Paveway weapon systems. Jamming and spoofing. Spoofing countermeasures. Guiding submarines and drones. Successfully spoofing a modern yacht.

  8. Integrated Navigation. Strapdown inertial navigation systems.. Ring lasers and fiber-optic gyros. Integrated Precisenavigation systems. MMMS devices in action.

  9. Differential Navigation and Pseudosatellites. Special committee 104’s data exchange protocols. Global data distribution. Wide-area differential navigation. Pseudosatellites.

  10. Carrier-Aided Solutions. Attitude-determination receivers. Spaceborne architectures. Accuracy comparisons. Dynamic and kinematic orbit determination. Monarch receivers. Relativistic time dilations.

The Global Positioning System by Robert A. Nelson and Thomas Logsdon.

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"The presenter was very energetic and truly passionate about the material."

"Tom Logsdon is the best teacher I have ever had. His knowledge is excellent. He is a 10!"

"Mr. Logsdon did a bang-up job explaining and deriving the theories of special/general relativity - and how they are associated with today's navigation solutions."

"I loved his one-page mathematical derivations and the important points they illustrate."

If this course is not on the current schedule of open enrollment courses and you are interested in attending this or another course as an open enrollment, please contact us at (410) 956-8805 or Please indicate the course name, number of students who wish to participate. and a preferred time frame. ATI typically schedules open enrollment courses with a 3-5 month lead time. For on-site pricing, you can use the request an on-site quote form, call us at (410) 956-8805, or email us at


Tom Logsdon has worked on radionavigation satellites and their constellations for more than 20 years. He helped design the Transit Navigation System and the GPS and he acted as a consultant to the European Galileo Spaceborne Navigation System. His key assignments have included constellation design, military and civilian applications, survivability enhancements and spacecraft autonomy studies.

Over the past 30 years Logsdon has taught more than 300 short courses in 31 different countries scattered across six continents. He has also made two dozen television appearances, helped design an exhibit for the Smithsonian Institution, and written and published 1.8 million words, including 34 non-fiction books. These include Understanding the Navstar, Orbital Mechanics, and The Navstar Global Positioning System.

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Sample Videos

Watch what is GPS Video  GPS Constellation Video