Roads and Highways

Spirent Launches Multi-Frequency Wideband GNSS Record & Playback System
June 10, 2013

Spirent Launches Multi-Frequency Wideband GNSS Record & Playback System

Spirent GSS6425

Spirent Communications has launched its GSS6425 multi-frequency GNSS record and playback (RPS) test system, a self-contained and portable unit that allows  users to record and play back data in the field without the need for an additional PC or external power.

The GSS6425 provides customers with RF recordings on for GPS, GLONASS, Galileo, BeiDou, and QZSS (Japan’s Quasi-Zenith Satellite System) constellations, including L1, L2, and L5 frequencies representing more than 30 megahertz of bandwidth.

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By Inside GNSS
In-Car GNSS Jammer Localization Using Vehicular Ad-Hoc Networks
May 2, 2013

In-Car GNSS Jammer Localization Using Vehicular Ad-Hoc Networks

FIGURE 1: ISTA (left) and GATE (right) measuring vans at the parking place at the GATE site in Berchtesgaden

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.

For the complete story, including figures, graphs, and images, please download the PDF of the article, above.

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By Inside GNSS
Furuno to Launch New Multi-GNSS Receiver Chips, Modules This Summer
March 29, 2013

Furuno to Launch New Multi-GNSS Receiver Chips, Modules This Summer

Furuno Electric Company has announced that new multi-GNSS receiver chips eRideOPUS 6 and eRideOPUS 7 — with active anti-jamming, multipath mitigation, and dead reckoning interfaces — will be available to the market beginning August 2013.

The eRideOPUS 7 receiver chip can process GPS and GLONASS signals (with a combined antenna), satellite-based augmentation system (SBAS) transmissions, Japan’s Quasi-Zenith Satellite System (QZSS), and — with a software update —Galileo signals. The eRideOPUS 6 is not GLONASS-capable.

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By Inside GNSS
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Droning On about UAVs
March 23, 2013

Droning On about UAVs

One of my fond memories as a boy growing up in rural northeastern Oregon is sitting on an apple box in the basement of our house reading back issues of National Geographic.

All those wonderful color photos. And the maps, with their little illustrated explanations of Roman ruins in England or Babylonian irrigation practices in the Fertile Crescent!

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By Inside GNSS
eCall Rising
March 18, 2013

eCall Rising

eCall is the European Union (EU) initiative aimed at reducing road casualties by increasing the speed and efficiency of emergency response. It involves a device installed in cars that will automatically dial the EU’s “112” emergency phone number in the event of a serious road accident.

Key data including time, date, and GNSS coordinates will be sent to the Public Safety Answering Point (PSAP) and then relayed to the most appropriate emergency service. The eCall is triggered by airbag deployment and impact sensor information.

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By Peter Gutierrez
PNT National Coordination Office to Focus on GPS Modernization, Spectrum, Signal Threats
February 20, 2013

PNT National Coordination Office to Focus on GPS Modernization, Spectrum, Signal Threats

Jan Brecht-Clark, director, National Coordination Office for Space-Based Positioning, Navigation, and Timing

With the urgent interference and patent controversies of the last two years largely resolved, the office tasked with helping sync the government’s GPS activities will take advantage of a lull in the action to plan a more strategic way forward — though that path does not currently appear to include talking to Congress about GPS civil funding.

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By Inside GNSS
They’re Back: LightSquared Tries New Route to Wireless Broadband, Later for Nearby GPS Band
November 17, 2012

They’re Back: LightSquared Tries New Route to Wireless Broadband, Later for Nearby GPS Band

With the election finally over, and the chain of decision makers now largely clear, the spectrum war between LightSquared and the GPS community is heating up again with new fronts opening at the Federal Communications Commission (FCC) and Congress.

The focus of the action are changes to rules governing spectrum and receivers that, if enacted, could enable LightSquared to move forward with its plans for a high-powered, terrestrial broadband network.

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By Inside GNSS
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Borsato-Foegelle-500px.jpg
November 14, 2012

LTE, Positioning, and the Implications for GNSS Over-the-Air Testing

FIGURE 1: (top) Device without case. (bottom) Device with case.

Long Term Evolution (LTE) technology in mobile communications, often called 4G, is making its way into a host of consumer devices. It started with data-only modules for Internet connectivity but quickly made its mark on smartphones, automotive communication, and embedded modules that provide fast and reliable wireless data connectivity to the machine-to-machine (M2M) market.

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By Inside GNSS
Fractured GNSS Fairy Tales
September 14, 2012

Fractured GNSS Fairy Tales

Back in television’s halcyon days I should have been watching Donald Herbert explain science and technology on his Mr. Wizard programs.

But I was probably laughing my way through the Rocky & Bullwinkle Show instead, especially one of its mainstays, Fractured Fairy Tales — irreverent, yet revealing retellings of the Grimm Brothers’ homilies to human foibles.

And so I became a journalist instead of an engineer, hoping to fracture fallacies and received truths rather than oil shale.

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By Inside GNSS
Spoofs, Proofs & Jamming
September 3, 2012

Spoofs, Proofs & Jamming

TABLE 1. Spoofer antenna requirements for various hardened GPS signal types

“Here is Edward Bear, coming downstairs now, bump, bump, bump, on the back of his head, behind Christopher Robin. It is, as far as he knows, the only way of coming downstairs, but sometimes he feels that there really is another way, if only he could stop bumping for a moment and think of it. And then he feels that perhaps there isn’t.”
– A.A. Milne, Winnie-the-Pooh

Is our faith in the integrity and infallibility of the Global Positioning System misplaced or, perhaps, insufficiently grounded?

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By Inside GNSS
Single- versus Dual-Frequency Precise Point Positioning
July 5, 2012

Single- versus Dual-Frequency Precise Point Positioning

Q: What are the tradeoffs between using L1-only and L1+L2 for PPP?

A: Precise point positioning (PPP) is a technique that can compute positions with a high accuracy anywhere on the globe using a single GNSS receiver. It relies on highly accurate satellite position and clock data that can be downloaded from the International GNSS Service (IGS) or obtained in real-time from a number of service providers, using either the Internet or satellite links.

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By Inside GNSS
INS Face Off

INS Face Off

TOP PHOTO: Antenna configurations on trials vehicle: Dual GPS antennas for the INS under test and single GPS antenna for the CIMU; BOTTOM PHOTO: Commercial IMU/DGPS system used for reference (left), FOG-based INS configuration (middle), and MEMS-based INS configuration 2 (right)

The automobile versus the horse and buggy. Cloud computing opposite desktop software. The trend is predictable, yet it is always surprising when one technology takes over the market space of another. After all, television did kill off the radio star.

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By Inside GNSS
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