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Survey and Mapping

Multi-GNSS Precise Positioning

Multi-GNSS Precise Positioning

Dennis Odijk, Curtin University

The availability of carrier phase tracking — counting the cycles of GNSS signals between satellites and a receiver — has long enabled high-precision users to achieve greater accuracy than using the navigation messages or pseudoranges. Improvements in high-end receivers and techniques such as real-time kinematic (RTK) and precise point positioning (PPP) have made once inconceivably accurate results almost routinely accessible.

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By Inside GNSS
Kingfisher
September 24, 2014

Kingfisher

Eugenia Acosta, an intern with Clearpath Robotics, unloads a Kingfisher unmanned vessel in preparation for a mission (top photo), the Kingfisher components and controller (bottom photo).

“Our products are robotic research platforms,” says Clearpath’s Meghan Hennessey. “These can be configured and programmed so that our customers can explore their particular areas of interest without all the cost and troubleshooting involved in actually building robots themselves.”

Hennessey says Clearpath platforms — which include the all-terrain Husky, the larger, tractor-like Grizzly and the waterborne Kingfisher — can be thought of as project kits.

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By Inside GNSS
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Topcon Launches Two UAS Mapping Systems

Topcon Launches Two UAS Mapping Systems

Topcon Positioning Group has released two unmanned aerial systems (UAS) for mapping — the Sirius Pro and Sirius Basic.  Both systems are designed to produce accurate solutions for the automated mapping of a wide range of sites — regardless of terrain — including construction sites, mines and quarries, and for use in land surveying, power line and pipeline inspection as well as precision agriculture field mapping.

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By Inside GNSS
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Falling Prices Will Spur Innovation, Competition in High-Precision GNSS Market
September 18, 2014

Falling Prices Will Spur Innovation, Competition in High-Precision GNSS Market

The high-precision GNSS industry should expect to see industry consolidation and a scramble for new markets and innovations as prices for high-end chips and modules continue to slide, experts told attendees at a ION GNSS+ panel discussion in Tampa, Florida, last week (September 11, 2014).

The falling prices could strain R&D budgets, they noted, but could also create opportunity as high-end receivers come within reach of emerging industries like self-driving cars, unmanned aerial vehicles, and are even incorporated into consumer products.

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By Inside GNSS
Delair-Tech.jpg
August 8, 2014

Europe’s UAV Experience

Clockwise from top left: Belgium’s Trimble UX5; MAVinci unmanned autonomous microplane is ready to take off for a land survey mission; MAVinci autonomous micro air-vehicle surveys an open mining site; A Delair-Tech UAV sits poised on its stand

To say that the European unmanned aerial vehicle (UAV) industry has drawn a crowd may be understating things. According to Paris-based UAV International, the non-profit association representing European UAV manufacturers, the European Union (EU) counts more than 1,000 “approved and authorized” civil UAV operators within its borders. Others put that number at closer to 1,400.

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By Inside GNSS
GNSS Position Estimates
July 21, 2014

GNSS Position Estimates

Q: How do measurement errors propagate into GNSS position estimates?

A: Not surprisingly, GNSS positioning accuracy is largely dependent on the level of measurement errors induced by orbital inaccuracies, atmospheric effects, multipath, and noise. This article discusses how, specifically, these errors manifest as position errors.

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By Inside GNSS
Environmental Sensing

Environmental Sensing

In the past 20 years GPS has simultaneously revolutionized both our modern infrastructure (by providing real-time navigation, mapping, and timing support) and our geodetic/surveying capabilities (by providing millimeter/centimeter-level positioning). At this point, most of the GNSS innovations we expect to see in the next decade will come from calculating positions more accurately and faster, while expanding from GPS to use of all available GNSS signals.

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By Inside GNSS
U.S. Geological Survey Releases New National Seismic Maps
July 20, 2014

U.S. Geological Survey Releases New National Seismic Maps

Students conduct the “drop, cover, hold on” safety procedure during an earthquake preparedness drill. Photo Credit: Jessica Robertson, USGS

Updated National Seismic Hazard Maps released by the U.S. Geological Survey (USGS) on Thursday (July 17, 2014) indicate a higher level of earthquake risk for the West Coast and some areas of the Midwest and East Coast then previously thought.

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By Inside GNSS
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