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Inside GNSS magazine • Volume 7 Number 2

March/April 2012

Online News, Articles, and Features

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Cover Story

GNSS Jamming in the Name of Privacy

Potential Threat to GPS Aviation

GNSS jammers used as personal privacy devices can interfere with nearby aircraft approach and landing systems. In some cases, use of these devices can take multiple reference receivers off-line due to integrity issues within the broadcast position message. This article describes incidents at Newark International Airport and other aviation facilities as examples of the adverse effects of such devices and discusses possible mitigations.

Feature

The GPS Dot and its Discontents

Privacy vs. GNSS Integrity

What is the endpoint of ever cheaper, ever smaller, and ever more sensitive GPS receivers? It’s the GPS dot: a miniature GPS tracking device that we’ll buy in bulk and stick on almost everything of value that we own. But the dot has a dark side: the secret and potentially malicious tracking of others. The need to protect ourselves from invasive tracking could lead to more GPS jamming and spoofing . . . and a showdown between privacy and GPS integrity.

Articles

One-Centimeter Accuracy with PPP

The Future of Satellite Navigation

Precise point positioning is available now via the ground segment of GNSS systems. Websites give us nearly real-time correction data for civil uses. So, why can’t the satellite segment provide this service? The author argues that this can be done and that not doing it is the equivalent of “Selective Unavailability.”

Working Papers

Peer-to-Peer Cooperative Positioning

Part I: GNSS-Aided Acquisition

Cooperative positioning among clusters of GNSS users allows for faster computation of positions with higher reliability. Its performance is similar to that of assisted GNSS, but without any infrastructure requirement. Peer-to-peer cooperative positioning could be a promising addition to fixed augmentation systems of the future.

Columns & Editorials
GNSS Solutions

Coarse Time Positioning

Washington View

LightSquared Fallout May Prompt Push for GPS Receiver Standards

Thinking Aloud

LightSquared Lessons Learned

The regulatory phase of the GPS/LightSquared controversy appears to be winding down, and the litigation phase warming up.

GNSS Hotspots

GNSS Hotspots

GNSS Data Points and Factoids to Amuse and Inform

In this issue: GPS trackers at sea, location-aware music, lonely places, launch strain and QZSS

News Updates

Satellite Development Advances as GPS Survives Budget Cuts, LightSquared

But jamming devices could affect the FAA's GPS-dependent NextGen program

GLONASS Plans 30 Satellites, Complete Augmentation System and Improved OCX by 2020

With a fully operational constellation and a big budget for GNSS, The Russian Space Agency pushes ahead

EU's Galileo and EGNOS Expect 2014-2020 Budget Boost of $9.1 billion

ESA plans aggressive Galileo launch schedule towards initial operational capability in 2014

China Will Launch Five Compass /BeiDou Satellites in 2012

Chinese manufacturers have ICD details - but the rest of the world will have to wait

Japan Aims at 4-Satellite QZSS by Decade's End

India plans a GAGAN launch later this year
Thought Leadership Series

GNSS Modernization

Challenges & Opportunities

As the world’s GNSS systems gain traction in building out constellations with new capabilities, what can be done to achieve maximum benefits?

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