From the Magazine

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

Innovation: The European Way

June 1, 2014By
FIGURE 1. Global vTEC map obtained with the NeQuick electron density model for a sunspot number of 150 at 13h UT in the month of April (grid resolution 2.5 degrees × 2.5 degrees).

Performance of the Galileo Single-Frequency Ionospheric Correction During In-Orbit Validation
In this month’s column, a team of researchers from ESTEC describe the European way for modeling the ionosphere for single-frequency users and compare its performance to the current GPS approach. read more

This article is tagged with and posted in From the Magazine, Innovation, Signal Processing

UAV Shipboard Landing with RTK

May 2, 2014By
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Limited landing area as well as interference due to wind disturbance and wave motion make shipboard landings of unmanned aerial vehicles (UAVs) extremely difficult. Use of UAVs at sea can enhance the efficiency of intelligence gathering and surveillance, and could also increase long-range air-strike capability. read more

On the Edge: Mapping from the Air with a UAV

May 1, 2014By
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Surveying an open-pit mine can be a hazardous undertaking. To obtain accurate volume measurements, it is necessary to pick up edges, known in the industry as “toes and crests,” as well as heaps. These are important features, since they provide a way to verify the current shape of a mine; but in light of increasingly stringent safety regulations and penalties,... read more

This article is tagged with and posted in Featured Stories, From the Magazine, Mapping, Mapping, Survey, Surveying, UAV/UAS/UGV

Innovation: Ground-Based Augmentation

April 2, 2014By
FIGURE 5. Research aircraft D-IBUF (Dornier Do 128-6).

Combining Galileo with GPS and GLONASS
While a GPS-based GBAS will offer improved navigation services for aircraft, might these services be even better if the systems were to use satellites from other constellations besides GPS? In this month’s column, the authors show how GBAS protocols might be modified to accommodate multiple constellations, offering results of preliminary tests using GPS, GLONASS, and Galileo simultaneously. read more

This article is tagged with , and posted in Aviation, Aviation & Space, From the Magazine, GNSS, Innovation, Receiver Design

A Mass-Market Galileo Receiver

April 1, 2014By
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Its Algorithms and Performance
The authors test three mass-market design drivers on a chip developed expressly for a new role as a combined GPS and Galileo consumer receiver: the time-to-first-fix for different C/N0, for hot, warm, and cold start, and for different constellation combinations. read more

This article is tagged with and posted in Featured Stories, From the Magazine, Galileo, Receiver Design