From the Magazine

Oregon moves to tablets for no-stake 3D

February 8, 2017By

The Oregon Department of Transportation (ODOT) is embracing the growing trend in highway construction to go “stakeless” and push to full 3D design. With more contractors using automated machine guidance applications, ODOT’s construction personnel are being asked to inspect projects with fewer stakes and visual indicators for line and grade. Employees are seeking to use the same data and information to... read more

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Tracking RFI: Interference localization using a CRPA

A controlled radiation-pattern antenna can preserve GNSS positioning while providing at least an azimuth angle towards an interference source. If integrated with an attitude and heading reference system, only a few lines of position pointing towards the RFI source could provide a fast indication of the probable ground location. read more

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System of Systems: FCC seeks comments on Galileo use in US

February 4, 2017By

FCC seeks comments on Galileo use in US The Federal Communications Commission (FCC) is inviting public comments on the European Commission’s request for a waiver of licensing requirements applicable to Galileo receivers in the United States. Comments are due Feb. 21. Read the notice here. If the waiver is approved, Galileo-capable receivers won’t need to be licensed in the U.S.... read more

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Qualcomm Research: Robust positioning from visual-inertial and GPS

Presented at ION GNSS+, September 2016 GPS positioning in urban scenarios is challenging because of large numbers of non-line-of-sight outlier measurements. We propose a robust positioning algorithm that combines GPS observations with visual-inertial odometry information to handle such outliers. We demonstrate the effectiveness of our algorithm in a simulation scenario with close to 80-percent outliers. In experiments in a mild... read more

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Robotic riverbed survey reveals unseen depths

January 17, 2017By

The Ribble River flowing through Preston in Lancashire, United Kingdom, has hidden depths. “The challenge with rivers is that much of the beauty and interest is hidden from view beneath the surface,” said Jack Spees, CEO of the Ribble Rivers Trust. “To reveal this beauty, we undertook a bathymetric survey of a section with particularly interesting features that is adjacent... read more

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Innovation: Correlator beamforming for low-cost multipath mitigation

January 13, 2017By , and

GNSS Pest Control
A new solution for GNSS multipath employs a multi-element antenna with RF signal switching and a single front end to reduce complexity, power consumption and cost. Correlator beamforming, initially used in the 2.4 GHz frequency band where it has proven effective at mitigating multipath in heavy industrial environments, has been successfully adapted for GNSS use. read more

Case study: Firms collaborate on product development

January 12, 2017By

Professional GNSS users now expect lightweight, easy-to-use receivers optimized for their particular workflows. Meanwhile, a streamlined manufacturing process means design and production of sophisticated instruments now takes months rather than years, and relies on global teams of networked specialists. Carlson Software approached Hemisphere GNSS in early 2015 with the goal of bringing a new GNSS receiver to market, one optimized... read more

Galileo declares: Open for business!

January 11, 2017By

At a Dec. 15 ceremony in Brussels titled “Galileo Goes Live,” two high officials of the European Commission issued the Galileo Initial Services Declaration. Plus: Ground control upgrade for GPS III approved; GPS funded at $847 million for FY 2017. read more

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