TAG: GNSS

Expert Opinions: The effect of LEO constellations on GNSS services

February 20, 2017By
Per Enge, Professor and Director, Stanford university Center for Position Navigation and Time

Experts explain the potential for low-Earth orbit constellations to augment services provided by the four medium-Earth orbit GNSS. read more

Establishing orthometric heights using GNSS — Part 11

February 1, 2017By
Figure 1 – GPS on Bench Marks Residuals using GEOID12B computed using NGS GPS on Bench Marks Shapes/rasters

Strategically Occupying Stations to Support NGS’ GPS on Bench Marks Program This is the 11th segment in my series on “Establishing Orthometric Height Using GNSS.” Each column has focused on a specific topic and provided procedures and tools for analyzing that topic. The columns are meant to build on each other. When addressing a topic that has been discussed in... read more

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GNSS CEOs see bright future, alternative PNT promises well

December 28, 2016By
foursquare

It has been a good year for all global navigation satellite systems (GNSS), as the chief executives of each system testify here. Alternative positioning, navigation and timing (PNT) also thrives. In this roundup of the latest highlights from the past year and forecasts for the future, 2017 augurs very well indeed! Let’s look at the newest alternative-PNT offerings first, followed... read more

Galileo declares Initial Services

December 15, 2016By
Maroš Šefčovič, à gauche, et Elżbieta Bieńkowska

At a Dec. 15 ceremony in Brussels titled “Galileo Goes Live,” two high officials of the European Commission issued the Galileo Initial Services Declaration. The Declaration of Initial Services means that the Galileo satellites and ground infrastructure are now operationally ready. These signals will be highly accurate but not available all the time, since the constellation is not yet complete... read more

Towering solutions: Using GNSS, BIM and a head-up display for speed, safety

December 12, 2016By
tower-gnss-cranes-o

Modern tower cranes can reach a height of more than 200 meters. They operate in a complicated, chaotic and constantly changing environment. This creates obstacles for the crane operator: poor visibility and dead angles — places the operator can’t see. Aiming to solve the problem is the Augmented Crane Navigation System (ACNS) project, which provides innovative intelligent operation of tower... read more

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Expert Opinions: Projection of 2017 PNT developments

December 12, 2016By

Q: What significant new developments in positioning, navigation or timing can we anticipate in 2017? A: With increasing focus on robust and resilient positioning, navigation and timing (PNT), the industry must respond with improved access to accurate and trusted position and timing, particularly for the warfighter. For military vehicles, this translates to a requirement for improved navigation systems that will... read more

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The System: First OCX receiver delivered to Air Force

November 3, 2016By
The first eight GPS III satellites are under contract and in production at Lockheed Martin’s GPS III Processing Facility outside of Denver.

Harris Corporation delivered the first of 34 modernized receivers to support the GPS Next-Generation Operational Control System (OCX). They will receive the signals sent by the current GPS satellite constellation plus the new signals sent by the next generation GPS III — 13 military and civilian signals in all. The receiver was shipped to the prime contractor, Raytheon Company, in... read more

Research: GNSS receiver fingerprinting

October 17, 2016By
borio-gnss-fingerpint

GNSS Receiver Fingerprinting for Security-Enhanced Applications   By Daniele Borio, Ciro Gioia, Gianmarco Baldini and Joaquim Fortuny, European Commission, Joint Research Centre (JRC), Directorate E: Space, Security & Migration. Presented at ION GNSS+, September 2016. GNSS data faking is similar to node forgery in a wireless network: A simulator or another device can be used to impersonate an actual GNSS... read more

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