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GPS & International Competitors


Technical Training Short On Site Course Quote

Watch for them! 128 radionavigation satellites will soon by orbiting up there along the space frontier. They will be owned and operated by six different countries hoping to capitalize on the financial success of the GPS constellation In this four-day short course Tom Logsdon describes in detail how these various radionavigation systems work and reviews the many practical benefits they are slated to provide to military and civilian users scatted around the globe. Logsdon will explain how each radionavigation system works and how to use it in practical situations. Each section of the course includes real-world explanations and examples using published inputs from the literature and from the instructor's international experiences.

Read instructor's GPS tutorials.

Watch what is GPS video     GPS Constellation video    View course sampler



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.

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

8 "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."

Contact this instructor (please mention course name in the subject line)

Course Outline:

  1. International Radionavigation Satellites. The Russian Glonass. The American GPS. 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.  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. Performance. Orbital mechanics considerations. The Glonass subsystems. Russia’s SL-12 Proton booster. Building dual-capability receivers.  Glonass featured in the evening news.
  5. Navigation Solutions and Kalman Filtering Techniques. Taylor series expansions. Numerical iteration.
  6. Designing Radionavigation Receivers. Antenna design. Code tracking and carrier tracking loops.  Commercial chipsets. Military receivers. Navigation solutions for orbiting satellites.
  7. Military Applications. Tactical and strategic applications. Autonomy and survivability enhancements. Smart bombs and artillery projectiles. Paveway weapon systems. Jamming and spoofing. Spoofing countermeasures. Guiding submarines and drones. Spoofing a yacht.
  8. Integrated Navigation. Strapdown Implementaions. Ring lasers and fiber-optic gyros. Integrated navigation systems. MIMS devices.
  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 receiver. Spaceborne systems. Accuracy comparisons. Dynamic and kinematic orbit determination. Monarch receiver. Relatiivistic time-dilation

    Note: For a brief overview of GPS please see The Global Positioning System by Robert A. Nelson.


    Tuition for this four-day course is $2090 per person at one of our scheduled public courses. Onsite pricing is available. Please call us at 410-956-8805 or send an email to