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Inside GNSS: Engineering Solutions from the Global Navigation Satellite System Community
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Thought Leadership Series
Inside GNSS magazine • Volume 6 Number 5

September/October 2011

Online News, Articles, and Features

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Cover Story

GPS III

Bringing New Capabilities to the Global Community

GPS III — the next generation of GPS satellites — promises better performance and new abilities to users. Here, authors from the designer and builder of those new satellites go deep into the technology and operational requirements to explain how modernized GPS III will benefit users worldwide.

Feature

Protecting the UK Infrastructure

A System to Detect GNSS Jamming and Interference

GPS jamming increases steadily, and new mitigation methods are high on the list of priorities for government and industry alike. Among the most advanced of these efforts is a public/private initiative in the United Kingdom that combines GNSS, eLoran, and communication links in a network of monitoring stations that already demonstrate success in detecting and identifying the source of intentional interference.

Articles
Technical Article

Breaking the Ice

Navigation in the Arctic

Oil exploration and shipping in the Arctic are on the rise. The delicate far North environment makes accidents particularly dangerous and navigation integrity critical. This article investigates the benefits of space-based augmentation systems (SBAS) — such as WAAS, EGNOS, and MSAS — to strengthen that integrity. The authors suggest new SBAS reference stations, Iridium satellites to broadcast integrity information to the users, and multi-constellation GNSS to improve vertical performance.

Technical Article

Cars on the Road!

Cooperative Vehicle Safety Applications Using an Integrated Positioning Solution

The blocked and reflected GNSS signals in urban canyons make it difficult to develop a practical autonomous vehicle. This article suggests a multi-sensor fusion position solution for cooperative vehicle safety applications. The authors
used integrated GPS/inertial navigation, clocks, odometers and lidar to navigate downtown Detroit. They evaluate their performance in this article.

Technical Article

Everywhere Navigation

Integrated Solutions on Consumer Mobile Devices

The promise of micro-electro-mechanical system (MEMS) technology has teased the GPS community for several years. Integration of MEMS with GPS and Wi-Fi demonstrates new urban and indoor positioning capabilities in challenging RF environments.

Columns & Editorials
Working Papers

Codes: The PRN Family Grows Again

Aviation Applications: Hybrid Navigation Techniques and Safety-of-Life Requirements, Part 2

Unlike most families that become stronger the more they have in common, pseudorandom noise families grow more robust as their differences increase. This column introduces some new offspring from the familiar elements of GNSS and other radionavigation system codes.

Washington View

Looming Budget Hurricane Could Swamp the GPS Landscape

The Washington View

Budget storms have reappeared on the horizon and the fore¬cast for defense expendi¬tures, including for the GPS program, is grim with a high probability of ugly.

Thinking Aloud

Worst GPS President Ever?

Common sense and due diligence would seem to call for holding off on rolling out LightSquared’s system until further tests can be conducted.

GNSS Solutions

The Differences in Differencing

How does measurement differencing affect my computed position?

GNSS Hotspots

GNSS Hotspots

GNSS Data Points and Factoids to Amuse and Inform

In this issue: Kitty Collars, Toxic Testers, Not THAT Soyuz, Japan's First and Spacekeeping

Review
Book Reviews

A Comprehensive Reference for OPUS

Guoquan Wang reviews CORS and OPUS for Engineers edited by Tomás Sole. This is the first book systematically introducing the Continuously Operating Reference Station and the Online User Positioning Service , two major innovations of the National Geodetic Survey (NGS) of National Oceanic and Atmospheric Administration (NOAA).

Thought Leadership Series

Multiple GNSS: Compatibility & Interoperability

More GNSS systems — success or excess?

Rapidly proliferating numbers of satellites mean more signals available for use. But could we end up having too much of a good thing?

360 Degrees
Signals
Trimble
Trimble
Jammer Dectector
Sensonor
Spectracom
CAST
NovAtel
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