TAG: GNSS

GLONASS Gone . . . Then Back

April 2, 2014By
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In an unprecedented total disruption of a fully operational GNSS constellation, all satellites in the Russian GLONASS broadcast corrupt information for 11 hours, from just past midnight until noon Russian time (UTC+4), on April 2 (or 5 p.m. on April 1 to 4 a.m. April 2, U.S. Eastern time). This rendered the system completely unusable to all worldwide GLONASS receivers.... read more

GNSS Future Glimpsed at Summit in Munich

March 31, 2014By

The Munich Satellite Navigation Summit annually gathers people involved with GNSS from around the world to report on current status and progress of the multiple systems. It is a high-level briefing of significant global importance. Of course Europe, Germany, Bavaria, and the European GNSS industry, now recognized around the world, all take the opportunity to present their capabilities and successes.... read more

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EGNOS, European Superiority, and the Need to Get ‘Very, Very Busy’

March 31, 2014By

The European GNSS scene received an early Easter present with the successful launch of two new-generation transponders for the European Geostationary Navigation Overlay Service (EGNOS) satellite-based augmentation system (SBAS). The two geostationary transponders, GEO-2, rose on board the SES ASTRA 5B satellite from the European Space Port in Kourou, French Guiana, on March 22 via an Ariane 5 lifter. The... read more

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GNSS and Radio Astronomical Observations

August 1, 2013By
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An alternative tool for detecting underground nuclear explosions? By Dorota A. Grejner-Brzezinska, Jihye Park, Joseph Helmboldt,  Ralph R. B. von Frese, Thomas Wilson, and Jade Morton Well-concealed underground nuclear explosions may go undetected by International Monitoring System sensors. An independent technique of detection and verification may be offered by GPS-based analysis of local traveling ionospheric disturbances excited by an explosion.... read more

Designing for the Future: Signal Simulation for Expanding GNSS

May 17, 2013By

Sponsored by: Hemisphere Broadcast Date: Thursday, May 16, 2013 Moderator: Alan Cameron, Editor & Publisher, GPS World Speakers: Mark Sampson, LabSat Product Manager, RaceLogic; John Fischer, Chief Technology Officer, Spectracom; Markus Lörner, Product Manager, Rohde & Schwarz; Steve Hickling, Lead Product Manager, Spirent Communications; Mark Wilson, Vice President of Sales, IfEN GmbH Simulation and testing experts offer key technical insights on the intricacies and importance of product and signal testing,... read more

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GNSS Constellation Update

April 17, 2013By

Original Broadcast Date: 10/25/12 Summary: This month, a new GPS satellite was launched, India launched a new SBAS satellite, and two Galileo satellites are scheduled to launch. Last month, China launched two more BeiDou satellites. There’s a lot of activity of the satellite navigation industry. In the webinar, I will discuss what these new developments mean to the surveying/mapping user, as... read more

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Four Galileo Birds Sighted over Asia

April 2, 2013By
Figure 1. Positions obtained by only Galileo E1 Open Service (the antenna is located at the roof of the Ta Quang Buu library building inside HUST campus)

Scientists in Hanoi, Vietnam, send word that on March 27 the four Galileo in-orbit validation satellites were visible at the same time in the sky over that Southeast Asian country for nearly two hours (from 2:15 to 4:00 GMT) while transmitting a valid navigation message. The research team of the NAVIS Centre at Hanoi University of Science and Technology (HUST)... read more

Septentrio Makes Galileo and Four-Constellation Position Fixes

March 14, 2013By
Galileo-PVT

Septentrio became the first receiver manufacturer to report an autonomous real-time position calculation using Galileo IOV satellites, with its own standard commercial receiver. The company based in Leuven, Belgium announced on March 12 that it performed a first autonomous real-time Galileo position, velocity, and timing (PVT) calculation, based on live Interface Control Document (ICD)-compliant Galileo messages from the four Galileo... read more