From the Magazine

Inertial for soldiers, first responders in dangerous environments


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
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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

Innovation: Evolutionary and revolutionary

July 11, 2016By
FIGURE 1.  An extended bandwidth GNSS antenna. The lower and connected dipoles are tuned to L2 and the upper coupled shorted dipoles are tuned to L1. Current flow in the circular waveguide of the GNSS antenna is shown. Strong circumferential currents flow at the top of the waveguide. Red indicates large currents and the arrows show the directions of the current flow.

The development and performance of the VeraPhase GNSS antenna
We take a look at a revolutionary design of a multi-frequency multi-GNSS antenna. Our authors discuss how the antenna evolved from a research project in academia to a commercial product about to enter the market. read more

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Google to provide raw GNSS measurements

July 10, 2016By
The keynote presentation at Google IO 2016, held May 12-20, at Shoreline Amphitheater in Mountain View, California.

User location takes center stage in new Android OS Raw GNSS measurements from Android phones. Yep, they are coming. At Google we have been working with our GNSS partners to give application developers access to raw GNSS measurements from a phone. This is really exciting, and marks a new era for our GNSS community. At Google I/O in May, we announced... read more

Networking for assisted PNT

July 8, 2016By

A networked radio from Thales is designed to meet soldiers’ need for assured positioning, navigation and timing (PNT) while on foot. The MBITR2 is part of a broader defense effort to provide PNT solutions in case of GPS jamming or interference. The MBITR2 is one of a number of devices and technologies, many still in development, to address this need.... read more

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Air Force jam-proof test range ready; Galileo teendom

July 7, 2016By
Locatalite transceiver installation in the White Sands Missile Range Ultra High-Accuracy Reference System, provided by the U.S. Air Force for testing equipment under conditions of GPS jamming.

Provides high-accuracy PNT even when GNSS jammed A critical capability to predict for GNSS chips and receivers —and for devices using alternative or back-up PNT technologies — is how they will actually perform without GPS. Filling this need, the U.S. Air Force 746th Test Squadron has declared Initial Operational Capability (IOC) for its new truth reference, the Ultra High-Accuracy Reference... read more

Innovation: There’s an app for that

June 13, 2016By
Figure 7. Total electron content in TECu across South America on Feb. 5, 2015, between 19:00 UTC and 19:15 UTC.

Using a smartphone for GNSS ionospheric data collection
In this month’s column, we take a look at the use of a smartphone app to collect GNSS ionospheric data. The authors' app-centric approach provides a software framework and output format that remain the same for different receivers. read more