Mark Greaves is one of two geodetic analysts at Ordnance Survey. He holds an M.Sc. in engineering surveying and geodesy and is a…

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Paul Cruddace is the geodesy and positioning manager at Ordnance Survey, Great Britain’s national mapping agency. He is responsible for the development and…

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Willard Marquis is a senior staff systems engineer with the GPS IIR and GPS III Flight Operations Group, Lockheed Martin Space Systems Company.

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Chris Goodall is a co-founder and the vice-president, applications, at Trusted Positioning Inc., Calgary, Alberta, Canada. He has been working in developing, deploying…

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First, let’s review the record of presidential leadership in GPS. In 1983, following the shooting down of an errant Korean airliner over Soviet…

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The Galileo In-Orbit Validation (IOV) ProtoFlight Model (PFM) and Flight Models (FM-2, FM-3 and FM-4) undergoing assembly and testing at Thales Alenia Space’s…

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LightSquared told a congressional committee today (September 8, 2011) that it would limit the on-the-ground power of its signals to avoid overpowering GPS…

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Equation 1 Q: How does measurement differencing affect my computed position? A: The short answer is, “That depends.” Standalone, or undifferenced, measurements obviously…

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Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter…

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CORS and OPUS for Engineers Edited by Tomás Soler PUBLISHED BY THE AMERICAN SOCIETY OF CIVIL ENGINEERS

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Consumer demand for positioning information is currently being met by a plethora of wireless positioning technologies. The most popular consumer positioning technology, GNSS,…

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FIGURE 1: Current availability in the Arctic with VAL=35 m and HAL=40m. The Arctic houses an estimated 90 billion barrels of undiscovered, technically…

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FIGURE 1: Simplified probe architecture GNSS vulnerability is rightly one of the most talked about topics of 2011.

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FIGURE 1: GPS III On Orbit In May 2008, Lockheed Martin Space Systems Company received a contract from the U.S. Air Force to…

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ICG Program Officer Sharafat Gadimova [Updated Sept 7, 2011] The United Nations and the United States will co-sponsor a special meeting to commemorate…

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