From the Magazine

System of Systems: Galileo birds active

August 23, 2016By
Galileo orbits viewed from above.

Galileo birds active Faulty launch victims still viable Europe’s fifth and sixth Galileo satellites, salvaged from their faulty 2014 Soyuz launch, will begin broadcasting working navigation signals for test purposes, for the benefit of receiver manufacturers, service providers and scientific researchers. The European Commission will decide later whether the two satellites will become part of the operational Galileo constellation. The... read more

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Air Force upgrades to better field reference system for testing GPS denial

Non-GPS positioning system, White Sands North Range. X = transmitter site.

Can’t Deny the Truth: Defeating the Jamming Threat Initial Operational Capability for the Ultra High-Accuracy Reference System has been declared by the U.S. Air Force. Even when GPS is being completely jammed, UHARS provides extremely accurate positioning, navigation and time — more accurate than GPS — over the large area of White Sands Missile Range in New Mexico. Amid a... read more

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Into the cold zone: UAV platform flies high in Antarctica

July 31, 2016By
Tiburon Jr. can be assembled in 15 minutes, an important feature in extreme environments.

In February, mechatronics lead Kevin Bass of Intuitive Machines and contracted pilot Mike Laible successfully flew multiple runs with an unmanned aerial vehicle platform, Tiburon Jr., on the coast of Antarctica. From Wilkins Aerodrome in the southeast, the team launched Tiburon Jr. and collected valuable testing and environmental data. Battling harsh weather and constantly changing conditions, the team flew the... read more

NDGPS loses interior, keeps coast

July 25, 2016By and

Heartland Corrections Services Now Commercial or WAAS-only The U.S. Coast Guard, Department of Transportation and Army Corps of Engineers have reduced the number of Nationwide Differential Global Positioning System (NDGPS) sites that will be decommissioned. The course correction keeps a coastal and Mississippi River network of stations largely intact, while discontinuing inland services. Last year at this time, the agencies... read more

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Iridium/GPS carrier phase positioning, fault detection

Interest in the Iridium constellation as a potential alternative and back-up provider of positioning and timing has increased with the announcement of impending operational capability. Overall concept information is hard to come by, but this 2009 ION GNSS paper gives an early look. The text is from the paper’s abstract. The iGPS high-integrity precision navigation system combines carrier phase ranging... read more

Inertial for soldiers, first responders in dangerous environments

inertial_navigation_featured

Integrated with images and dense distance measurements from a range camera using active illumination, inertial navigation produces real-time results on a tablet computer. Experiments demonstrate that the system provides good positioning and mapping performance in a range of indoor environments, including darkness and smoke. Positioning and mapping abilities for indoor environments can speed search and rescue, keep firefighters from getting lost, and help a commander... read more

Terrestrial beacons bring wide-area location indoors

July 12, 2016By and
Control-plane architecture (LTE) for NextNav E2E.

It has been easy to overlook these limitations as the enormous benefits of GNSS have become pervasive, but the increasing demand especially for indoor geolocation now requires a robust solution designed for the indoors and urban canyons. read more

New testbed for verifying location technologies

July 11, 2016By
(rmnoa357 / Shutterstock.com)

The FCC ordered that within six years, the elusive z-axis, or altitude, be added to requirements and meet accuracy standards in cases when there is no dispatchable location. read more