GNSS Solutions • November/December 2016
Q: What are the challenges of ray-tracing for GNSS applications?
A: Simulating the propagation and reception of GNSS signals in complex environments is a challenging task. Indeed, the user always has to trade off between the computation time and the reliability of the output. Moreover, the motion of GNSS satellites, atmospheric effects, and building geometry are always difficult to model.
Inside GNSS • November/December 2016
Spacecraft in low Earth orbit (LEO), at altitudes below 3,000 kilometers, remain within the main Global Positioning System (GPS) signals’ Earth coverage. Spacecraft employing GPS at these altitudes enjoy signal availability and navigation and timing performance emulating that of terrestrial users.
March 14, 2017 - March 16, 2017
January 23, 2017 - January 25, 2017
May 9, 2017 - May 12, 2017
October 31, 2016
Experts working on standards for airborne equipment using GPS, Galileo, and a satellite-based augmentation system (SBAS) appear to have found a way to deal with an unusual problem — too many satellites.
October 28, 2016
This year's InterGEO in Hamburg, Germany, featured the latest in geospatial wizardry including new navigation and positioning components and boards not only driving progress in the surveying and mapping industries, but also feeding into the wider GNSS user community.
San Francisco-based Swift Navigation came into InterGEO brandishing the all-new Piksi Multi, described as the world's first affordable multi-band and multi-constellation receiver.
October 27, 2016
Unmanned aerial systems (UAS), or drones, highlighted the entries at the 2016 European Satellite Navigation Competition (ESNC).
October 25, 2016
The National Aeronautics and Space Administration (NASA), the European Space Agency (ESA) and Qascom, an Italian company specializing in Galileo, are collaborating to build the first GPS and Galileo receiver to be tested on board the International Space Station (ISS) Space Communications and Navigation (SCaN) Testbed.
October 14, 2016
The modified Ariane 5 launcher that will lift four Galileo satellites into space is being assembled at Europe's Spaceport in Kourou, French Guiana, preparation for launch on November 17.