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About Richard B. Langley

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Richard B. Langley is a professor in the Department of Geodesy and Geomatics Engineering at the University of New Brunswick (UNB) in Fredericton, Canada, where he has been teaching and conducting research since 1981. He has a B.Sc. in applied physics from the University of Waterloo and a Ph.D. in experimental space science from York University, Toronto. He spent two years at MIT as a postdoctoral fellow, researching geodetic applications of lunar laser ranging and VLBI. For work in VLBI, he shared two NASA Group Achievement Awards.

Professor Langley has worked extensively with the Global Positioning System. He has been active in the development of GPS error models since the early 1980s and is a co-author of the venerable “Guide to GPS Positioning” and a columnist and contributing editor of GPS World magazine. His research team is currently working on a number of GPS-related projects, including the study of atmospheric effects on wide-area augmentation systems, the adaptation of techniques for spaceborne GPS, and the development of GPS-based systems for machine control and deformation monitoring. Professor Langley is a collaborator in UNB’s Canadian High Arctic Ionospheric Network project and is the principal investigator for the GPS instrument on the Canadian CASSIOPE research satellite now in orbit.

Professor Langley is a fellow of The Institute of Navigation (ION), the Royal Institute of Navigation, and the International Association of Geodesy. He shared the ION 2003 Burka Award with Don Kim and received the ION’s Johannes Kepler Award in 2007.

Posts by Richard B. Langley

Innovation Insights: What is a carrier phase? Posted on 23 Feb 2023 in the From the Magazine & Innovation categories.

A carrier is basically a harmonic electromagnetic wave — a pure continuous sinusoidal wave with a single constant frequency and amplitude. Read more»

Innovation: Software-defined radios for GNSS Posted on 22 Nov 2022 in the From the Magazine & Innovation categories.

A Step-by-Step Exposition of an Educational Resource

Researchers discuss their development and testing of additional freely available SDR codebases covering all four GNSS (GPS, Galileo, BeiDou and GLONASS). Read more»

Innovation: Monitoring GNSS interference and spoofing — a low-cost approach Posted on 17 Aug 2022 in the Featured Stories & From the Magazine & Innovation categories.

A team of researchers from Stanford University and the University of Colorado describe how they are using relatively inexpensive equipment and sophisticated software and analyses to detect and warn of GNSS jamming and spoofing. Read more»

Innovation: A terrestrial networked positioning system Posted on 14 May 2022 in the From the Magazine & Innovation categories.

Combining Fiber Optics and Wideband RadioA team of researchers has developed a system that uses White Rabit to achieve decimeter-level position accuracy in multipath environments. Read more»

Innovation: Self-driving cars in urban neighborhoods Posted on 01 Feb 2022 in the From the Magazine & Innovation & Transportation categories.

How Inertial Systems and GNSS Availability Will Help

Self-driving cars in urban environments can be problematic. The required multi-sensor automated systems will include GNSS, but buildings block and reflect GNSS signals, reducing system availability and accuracy. Researchers from the Illinois Institute of Technology report on how inertial navigation systems coupled with wheel-speed sensors and vehicle dynamic constraints can help. Read more»

Innovation: Mode N provides alternative PNT for aviation Posted on 08 Nov 2021 in the From the Magazine & Innovation & Transportation categories.

Mode N could meet the need for a reliable alternative PNT system for aircraft navigation. It builds on aspects of existing navigation systems and aviation-certified signals not originally intended for navigation, including some used for communications and surveillance. In this article, a team of researchers from the German Aerospace Center describe Mode N, looking at its signal format, required ground infrastructure, aircraft avionics and the potential position accuracy this system could offer. Read more»

Innovation: Attitude determination and RTK positioning using low-cost receivers Posted on 01 Jun 2021 in the From the Magazine & Innovation categories.

Getting It Better

While RTK positioning and attitude determination is readily done with high-end equipment, it is still a challenge to get good results for kinematic platforms with low-cost receivers. In this month’s column, we learn how a team of researchers in France is trying to do just that. Read more»

In the beginning, there was innovation Posted on 07 Sep 2020 in the Opinions categories.

When GPS World published its first issue in January 1990, only 15 GPS satellites had been launched, including the 10 prototype or Block I satellites. And four of those early... Read more»