Columns and Editorials

Di Qiu: Opportunities of Signals

Di Qiu: Opportunities of Signals

Di Qiu at the site of her current employer

SIDEBAR: Di Qiu’s Compass Points

Landing all-weather aircraft safely in storms. Protecting sensitive data not only through encryption but based on the location at which it is being accessed. Ensuring that accurate and timely information reaches first responders responding to emergencies. 

Although still in the early part of her career, Di Qiu has already made significant contributions to these crucial applications of navigation technology. 

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By Inside GNSS
Living in an APNT World

Living in an APNT World

It’s all about the backups now. The alternatives. The gap-fillers.  

Back in the 1990s, when I first came across the U.S. Federal Radionavigation Plan (FRP), I learned that the rise of the Global Positioning System drove the biannual FRP process because of the expectation that GPS would enable the government to shut down many pieces in the hodgepodge of positioning, navigation, and timing (PNT) systems.  

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By Inside GNSS
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Europe Needs Entrepreneurs
May 23, 2013

Europe Needs Entrepreneurs

Honestly, one gets the feeling that the European navigation community has finally had enough of talking and is ready to take Galileo out of the hands of politicians and put it into the hands of users, including businesses that can translate European GNSS into real products and services to be bought and sold.  

The feeling has certainly been growing within the European navigation community, as evidenced by the conversations at the recent European Navigation Conference (ENC) in Vienna.  

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By Peter Gutierrez
Calculating Time Offsets

Calculating Time Offsets

Q: How do you deal with timing differences between GNSSs? 

A: All GNSSs inherently depend on precise timekeeping to measure the satellite/receiver time of flight of signal propagation with sufficient accuracy to compute ranges/distances for multilateration calculations. Each GNSS ground segment therefore dedicates considerable effort to maintaining a highly stable atomic time scale as well as the corresponding offset to global standards such as UTC (Coordinated Universal Time).

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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
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