Magazine Department Archives - Page 2 of 35 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

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.

By Inside GNSS

Congressional Mandate Means More Work on New Military GPS Receivers

The Air Force is scouring the landscape for its next round of receiver technology now that the first increment of its military receiver development program is moving into a deeper testing phase.

By Dee Ann Divis

Spectral Transparent Adhesive

In the past two decades, satellite navigation systems have undergone great development. The development of new generations of global navigation satellite systems (GNSS), represented by GPS III, Galileo, and the BeiDou global system (BDS), is rapidly advancing.

By Inside GNSS

[uam_ad id="183541"]

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.

By Inside GNSS

Location Privacy Challenges and Solutions, Part 2

Figures 1 – 3, Table 1

Table 1

Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Em. Univ.-Prof. Dr.-Ing. habil. Dr. h.c. Günter W. Hein.

This is the second article in a series. For Part 1: GNSS localization, see here.

By Günter W. Hein

Do modern multi-frequency civil receivers eliminate the ionospheric effect?

Figures 1 – 10

Q: Do modern multi-frequency civil receivers eliminate the ionospheric effect?

By Mark Petovello

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.

By Peter Gutierrez

[uam_ad id="183541"]

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.

By Dee Ann Divis

GNSS SDR Metadata Standard

Figures 1 – 6

By Inside GNSS

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.”

By Inside GNSS

September 19, 2017

How do you use GNSS to compute the attitude of an object?

Q: How do you use GNSS to compute the attitude of an object?

By Inside GNSS

GPS III Contest At Hand But Context has Shifted Sharply

After several years of shifting plans the competition to build the next tranche of GPS III satellites is poised to start, though the context in which that contest will take place has changed markedly from when planning first began.

By Dee Ann Divis