Thales Avionics Tracks L1 Signal of First Galileo Satellite

December 12, 2011 - By

Following the recent launch of two Galileo satellites, Thales Aviation of Valence, France, has successfully acquired and tracked the new L1 Open Service signal transmitted by one of them (PRN 11) with a new Galileo high-end receiver made by the company. read more

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A Nationwide RTK Network: A Great Idea, But…

December 12, 2011 - By

Some folks are proposing that a nationwide RTK Network (RTN) be piggy-backed on the controversial LightSquared communications network. That could be cool, if it can be done. No one is saying that it can’t be done, but there are reservations on whether it would be worth the massive investments needed to pull it off, and that there might be little gain at all over the existing presence of RTN in the U.S. read more

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Directions 2012: A Look Ahead

December 7, 2011 - By

At the end of every year, I title this column Directions, in which I discuss significant developments, trends, technologies, companies, and so on, in the GNSS industry. This year, two entities have captured my attention and have the potential to significantly transform the GNSS industry: the FCC/LightSquared and Galileo, the European satnav system. read more

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Preparing for the Next Generation: The Multi-GNSS Asia Demonstration Campaign

December 1, 2011 - By

A dramatic increase over the next five years to roughly 100 GNSS satellites in the skies over Asia and Oceania makes that region the fastest growing area in GNSS. The Multi-GNSS Asia (MGA) initiative, a cooperative international demonstration campaign, seeks to take full advantage of this scientific and technical windfall, gaining early experience with the new signals and services of multi-constellation GNSS. read more

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Expert Advice: Test-Based Civil Receiver Certification

December 1, 2011 - By

Disaster-preparedness plans recognize the individual’s role in his or her own survival. When storms approach, have water, food, and basic survival gear on hand. It takes time for help to arrive. The civil GPS industry faces an oncoming storm of interference, and the receiver is the first line of defense. As we integrate GPS into all facets of our lives and infrastructure, we become more subject to disruptions, both unintentional and intentional. Newark International Airport now sees several jamming events per day. In Taiwan, one airport experiences an average of 117 events per day! read more

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Low-Complexity Spoofing Mitigation

December 1, 2011 - By

Most anti-spoofing techniques are computationally complicated or limited to a specific spoofing scenario. A new approach uses a two-antenna array to steer a null toward the direction of the spoofing signals, taking advantage of the spatial filtering and the periodicity of the authentic and spoofing signals. It requires neither antenna-array calibration nor a spoofing detection block, and can be employed as an inline anti-spoofing module at the input of conventional GPS receivers. read more

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On the Edge: Go Big Green

December 1, 2011 - By

Nav On Time, a French Company located in Toulouse, has successfully completed a trial campaign of its Mow-By-Sat precision guidance on a commercial lawnmower. In August, the prototype of a GPS-guided robot lawnmower was installed on a golf driving range near Toulouse and tested in real conditions of use, day and night, maintaining a 25,000 square meter lawn since then. In a previous campaign, the mower covered more than 2.2 million yards — equal to1,250 miles or 2,000 kilometers — in 2,100 hours. (See videos of the mower in action at read more

Letters to the Editor: The Cost of Reliability

December 1, 2011 - By

Letters to the Editor: The Cost of Reliability read more

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