From the Magazine

GNSS Research: Summary of STRIKE3’s first year

Presented at the European Navigation Conference, Switzerland, May 2017 This paper summarizes major findings from the first year of monitoring by the International Knowledge Exchange, Experimentation and Exploitation (STRIKE3), a new European initiative to support the increasing use of GNSS within safety, security, governmental and regulated applications and addressing concerns about GNSS denial of service attacks. STRIKE3 monitors the international... read more

Here there be dragons: GIS explores the unknown

July 12, 2017By

Here there be dragons. That phrase (or a variation of it) was used by early mapmakers to designate the unknown — and alert sailors to the danger of traveling into uncharted waters. I’ve always admired explorers who dared to push the boundaries of the known world. We’ve moved from the Age of Exploration to the Age of Information, but exploration continues... read more

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Innovation: Navigation from LEO

Current Capability and Future Promise
GPS signals are so weak, they cannot be used reliably where they are obstructed such as indoors or in concrete canyons. But if the satellites were much closer, their signals would be much stronger. The low Earth orbit Iridium constellation is already orbiting, and providing a PNT service. This month we learn about its current capability and future promise. read more

Innovation: Checking the accuracy of an inertial-based pedestrian navigation system with a drone

I’m Walking Here!
An ingenious navigation technique makes use of how the human body works to develop an accurate pedestrian navigation system — one whose accuracy has been checked using drone imagery. read more

Innovation: Laser ranging to GNSS satellites

May 24, 2017By

In this article, author Urs Hugentobler looks at the history of laser ranging to navigation satellites, how that ranging has improved the accuracy of the orbits of those satellites, and what the future portends for this important contribution to space geodesy. read more

Road navigation using multiple dissimilar environmental features

May 23, 2017By

New navigation paradigms combining GNSS and inertial with additional sensors can increase overall reliability and power robust road navigation. A feasibility study tests a barometer, a magnetometer and a camera looking at road signs, and concludes that such sensors examining environmental features can supply the necessary context for frequently traveled or shared routes. read more

Research: Infrasound direction-finding, positioning system

May 23, 2017By

By John P. McIntire, Duy K. Nguyen, Eric T. Vinande, and Frederick C. Webber U.S. Air Force Research Laboratory / Presented at ION ITM, January 2017 Infrasound refers to sound frequencies below the threshold of human hearing, around 20 Hz or less. There are a variety of natural sources of infrasonic emissions, including thunderstorms, avalanches, meteors, earthquakes, volcanos, and windstorms... read more

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ESA: Space debris enters ‘more feared exponential trend’

May 23, 2017By

In April, the European Space Agency (ESA) hosted the 7th European Conference on Space Debris at ESA’s Satellite Control Centre in Darmstadt, Germany. There, international experts discussed ways to head off the threat of space junk. ESA estimates there are roughly 5,000 objects larger than 1 meter, 20,000 objects over 10 centimeters and 750,000 “flying bullets” of around one centimeter.... read more

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