In celebration of Richard Langley’s decades-long contribution to GPS / GNSS / PNT, we are publishing a selection of testimonials and photos from some of his colleagues and friends, gathered by his former students Sunil Bisnath and Attila Komjathy.
A carrier is basically a harmonic electromagnetic wave — a pure continuous sinusoidal wave with a single constant frequency and amplitude.
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).
In honor of 3.14.2019, here is what GPS World’s Innovation column editor Richard Langley wrote about π in an […]
In April 2016, I introduced readers to useful features of our newly redesigned website at GPS World. This […]
Precision on Board
Described are the results of realistic simulations carried out to precisely position a low-Earth-orbit satellite using a source of real-time GPS corrections actually transmitted by a network of geostationary satellites. Even accounting for data outages, 3D positioning accuracies better than a decimeter have been obtained. Precision on board? Not right now but likely coming real soon.
The development and performance of the VeraPhase GNSS antennaWe take a look at a revolutionary design of a multi-frequency multi-GNSS antenna. Our authors discuss how the antenna evolved from a research project in academia to a commercial product about to enter the market.
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