Column Archives - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design


April 4, 2018

GNSS Analysis Tools from Google

Authors: Frank van Diggelen and Mohammed Khider
Google has publicly released GNSS Analysis Tools to process and analyze GNSS raw measurements from your phone. These tools enable manufacturers to see in detail how well the GNSS receivers are working in each particular phone design and thus improve the GNSS design and performance in their phones. Also, with the tools publicly available there is significant value for app-developers, researchers and educators. Here, the authors show what these tools do, and how they reveal details of receiver and signal behavior that are not possible to observe without raw measurements.

Read More >

By Inside GNSS
January 1, 2018

The Persistence of Quality

After spending a career as a GNSS advocate and critic, technical interpreter and PNT raconteur, our colleague, Glen Gibbons, begins his transition to Editor Emeritus status this month. And while his daily GNSS activities cease, his contribution for thoughtful analysis, cogency and a reasoned perspective are retained—his imprimatur, gratefully accepted.

Read More >

By Inside GNSS

What is navigation message authentication?

Q: What is navigation message authentication?  

A: As of today, all open civil GNSS signals are transmitted in the clear, conforming to interface specifications that are fully available in the public domain. Receivers will accept any input that conforms to the specifications and treat it as if it came from a GNSS satellite. Combined with the extremely low power levels of GNSS signals this makes it almost trivially simple to spoof a GNSS receiver.

Read More >

By Inside GNSS
November 27, 2017

Unfinished Business

All good things must come to an end. At which point, if Fortune smiles on us, other good things begin or continue.

Case in point: as of year-end 2017 I am promoting myself to Editor Emeritus of Inside GNSS and turning to some unfinished business that I have with life. Of course, after 28 years I still have some unfinished business with GNSS, this amazing technology and industry that has more growth ahead of than behind it, more prospects for innovation, more unfinished business than ever.

Read More >

By Inside GNSS

Fundamental Rethink for Galileo Commercial Service

At the lavish European Satellite Navigation Competition Awards Ceremony, we caught up with Carlo des Dorides, general director of the European GNSS Agency (GSA), who updated us on the status of the much-anticipated Galileo Commercial Service (CS).

“On the CS, we are dialoging extensively with EU member states, because there is a more and more consolidated view that there could be an advantage to providing the service for free,” des Dorides said.

Read More >

By Peter Gutierrez

Ligado: Business and Network Plan Remain Unclear

A highly anticipated presentation by Ligado Networks to the nation’s leading satellite navigation experts took an unexpected turn when the company said it could not provide essential network information because it was looking to the government for technical direction and its business plans were still in flux.

Read More >

By Dee Ann Divis
September 26, 2017

Ensuring PNT for All

Today’s headlines frame my thoughts about securing GNSS assets, which one expert has characterized as our “least visible and most vulnerable infrastructure.”

Read More >

By Inside GNSS
1 2 3 18