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January 26, 2017

GPS Data Used by ATRI to Name Top 100 Truck Bottlenecks

The American Transportation Research Institute (ATRI) released on January 25 its annual list highlighting the most congested bottlenecks for trucks in America.

Congestion chokepoints hurt the economy and the environment, so the ATRI uses GPS data collected each year to help identify times and locations that truckers will want to avoid.

Inside GNSS • January/February 2017

GNSS Hotspots

Tracking illegal logging in Romania, autonomous mining, ancient calendars and Canadian cows

Thinking Aloud • January/February 2017

No Sudden Moves

As with the notion of “disruption,” unpredictability can be useful. A move in chess or go, for instance. Or in the case of cuisine — say, when usurping Taco Thursday with chicken tagine. Even in negotiations, an unanticipated gambit can change the outcome positively.

Sometimes, of course, unpredictability is in the immanent nature of things. Despite advances in meteorological technology and science, weather continues to prove fickle. Foreknowledge of earthquakes remains difficult to pin down in space and time.

GNSS Solutions • January/February 2017

Is it possible to build a low-cost system to detect and locate a single GNSS jammer in near-real time?

Q: Is it possible to build a low-cost system to detect and locate a single GNSS jammer in near-real time?

A: GNSS jammers are an ongoing threat to the reliable use of GNSS. The problem of geolocating GNSS jammers can be addressed using a time-difference-of-arrival (TDOA) processing technique; however, this problem is quite different than geolocating jammers in other radio frequency systems. The two main differences are:

(1) No GNSS are available to use as a timing reference.

Inside GNSS • January/February 2017

GPS Roundup: Congress Reopens for Business

Washington has seen a lot of transitions, so even amidst political controversy it’s generally business as usual.

For the GPS community that business, at least in the near term, will likely center on changes in federal leadership — with many key appointments, like a new Secretary of the Air Force, still to be determined. In addition — even at this early stage when new lawmakers are still trying to find their offices — there are issues and opportunities worth watching in emerging legislation.

Working Papers • January/February 2017

Interference Localization from Space

Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe's Galileo Operations and Evolution.

Inside GNSS • January/February 2017

L5 RTK Over India:

Inside GNSS • January/February 2017

Multi-Receiver GPS-Based Direct Time Estimation

Incorporation of real-time synchronized phasor measurements in the control of power grids can play an important role in maintaining the overall closed-loop stability of the power system. In the past, instability in the power grid caused disturbances ranging from small local perturbations to severe large scale blackouts as can be seen from Figure 1. Currently, the synchronization achieved in measurements collected using devices known as supervisory control and data acquisition (SCADA) is not robust enough for efficient monitoring the power grid.

People • January 20, 2017

Swift Navigation Co-Founders Make Forbes 30 Under 30 Consumer Tech List

Swift Navigation co-founders Fergus Noble (29) and Colin Beighley (28) have been honored in the 2017 Forbes 30 Under 30 Consumer Technology list.

Swift Navigation is a San Francisco-based startup that provides centimeter-accurate real-time kinematics (RTK) GPS and GNSS positioning technology for autonomous vehicles, unmanned aerial vehicles (UAVs), precision agriculture, robotics, surveying, space applications and more.

January 19, 2017

ESA Puts Brave Face on Galileo Clock Failures

At the traditional January media briefing in Paris yesterday (January 18, 2017), European Space Agency (ESA) General Director Jan Woerner was forthright in laying out the knowns and unknowns about the failed rubidium and hydrogen maser clocks onboard orbiting Galileo satellites, clocks that are absolutely crucial for accurate positioning.

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