A: System Categories

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January 26, 2020

What freeware or open-source software packages are available to support GNSS performance evaluations?

In the years since civil and commercial use of GPS and GNSS became common in the mid-1990s, a variety of software tools have been developed to perform offline analyses of GNSS performance and data collected from GNSS receivers. Some of these tools are part of commercial software packages such as Matlab [1] or STK [2]. This article focuses on tools that are freely available (as of early 2020) and are standalone or work with commercial software.

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By Sam Pullen
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Time Is Relative, Position Absolute

I strode into the plenary session of the ION International Technical Meeting, primed and ready for a barrage of modernity, of out-in-front advances in precision positioning, navigation and timing. The first thing I saw was a 7-foot tall cesium beam tube, an early atomic clock from the 1950s.

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By Alan Cameron
January 12, 2020

Lamplights Glisten in the Cold As We Reflect Back – and Forward

We’ve a long history as a learned society,” Royal Institute of Navigation Director John Pottle told the plenary audience, “solving navigation problems is no longer a simple matter. It’s not all about the technology anymore. What we think we do, uniquely, in the world is to bring different disciplines together who share a common interest in navigation.”

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By Peter Gutierrez
January 5, 2020

Low-cost GNSS/INS Integration Conquers Harsh Environments

A software-driven navigation engine makes consistent, reliable navigation possible in tunnels, garages and urban canyons.

In difficult GNSS signal environments for driving—and here urban canyons, tunnels and parking structures are the standouts—GNSS performance may be severely degraded or completely denied. Inertial aiding has become the standard for ground vehicle navigation. Requirements for autonomous navigation in these circumstances will be rigorous, but those for map-matching, telematics and fleet vehicle tracking are much less so.

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By Inside GNSS
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