From the Magazine

GNSS Lies, GNSS Truth

November 6, 2014By
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A new method detects spoofing attacks that are resistant to standard RAIM technique and can sense an attack in a fraction of a second without external aiding. The signal-in-space properties used to detect spoofing are the relationships of the signal arrival directions to the vector that points from one antenna to the other. A real-time implementation succeeded against live-signal spoofing attacks aboard a superyacht cruising in international waters. read more

Toward a Unified PNT — Part 2

October 31, 2014By
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The coming requirements of greater accuracy and reliability in a range of challenging environments for a multitude of mission-critical applications require a multisensor approach and an over-arching methodology that does not yet exist. read more

Toward a Unified PNT — Part 1

October 2, 2014By
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Complexity and Context: Key Challenges of Multisensor Positioning
The next generation of navigation and positioning systems must provide greater accuracy and reliability in a range of challenging environments. No single navigation technology is robust enough, so a multisensor solution is required. read more

Innovation: Scintillating Statistics

October 2, 2014By
FIGURE 2. Current multi-GNSS data collection system configuration at Jicamarca Radio Observatory in Peru. (GLO = GLONASS, BDS = BeiDou System, VPN = virtual private network, ISMET = ionospheric scintillation monitoring event triggering, RAID = redundant array of independent disks)

A Look at High-Latitude and Equatorial Ionospheric Disturbances of GPS Signals
In an effort to help improve the monitoring, mapping, and modeling of scintillations, a team of researchers led by Prof. Jade Morton is monitoring high-latitude and equatorial scintillations and they discuss some of their preliminary results in this month’s column. read more

2014 State of the GNSS Industry Report

October 1, 2014By

The 2014 State of the GNSS Industry Report reveals the results of our annual survey of GNSS professionals, covering the state of their business, the economic climate for GNSS products and services, driving market factors, the government’s role in funding and regulating, budgets devoted to R&D, the effects of jamming, and the “Issue of the Year.” Click here to download the 2014... read more

GIS Builds Awareness, Improves Treatment, Aids Prevention

October 1, 2014By
Figure 1. Mammograms in last two years; percent of respondents, by counties.

North Coast Media announced in May 2014 its plans to donate to the American Cancer Society a portion of all October issues’ revenue from its market-leading media brands: GPS World, Pit & Quarry, LP Gas, Pest Management Professional (PMP), Landscape Management (LM), and Golfdom. “Giving back is an important part of the culture here at North Coast Media,” said President... read more

Multi-Constellation. Dual-Frequency. Single-Chip.

September 1, 2014By
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This integrated circuit supports simultaneous reception and processing of the GPS L1/L5, Galileo E1/E5a, and GLONASS G1 signals with 40 tracking channels. The dual-band analog RF front-end is integrated on the same mixed-signal chip as the baseband hardware, including an embedded processor to close the tracking loops: overall, a compact, low-power, and low-cost solution. read more

This article is tagged with , and posted in From the Magazine, Mobile Devices, Receiver Design, Sensor Fusion

Innovation: Not Just a Fairy Tale

July 1, 2014By
Figure 1.  Vehicle-to-vehicle communications as envisioned by the United States Department of Transportation.

A Hansel and Gretel Approach to Cooperative Vehicle Positioning
Several technologies are being developed for accurate cooperative vehicle positioning, but GNSS also has a role to play. In this month’s column, team of British researchers turn to a children’s fairy tale for inspiration in their development of a cooperative vehicle positioning approach using carrier-phase observations — another innovative application of real-time kinematic or RTK GNSS technology. read more

This article is tagged with , and posted in From the Magazine, GNSS, Innovation, Road