A: System Categories

U.S. Secretary of Defense Wants to Move Past GPS to MEMS-Based Navigation, PNT Experts Doubtful
June 30, 2015

U.S. Secretary of Defense Wants to Move Past GPS to MEMS-Based Navigation, PNT Experts Doubtful

Ashton Carter, the new U.S. Secretary of Defense has been making clear he supports moving past GPS to a disbursed network based on microelectromechanical systems or MEMS for position, navigation, and timing (PNT) information.

Carter, who was tapped to lead the Pentagon in February, appears to have first publicly floated the idea a year ago, about six months after leaving the Department of Defense (DoD), where he had served most recently as deputy secretary of defense, a role that included cochairing the interdepartmental National Space-Based PNT Executive Committee.

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By Inside GNSS
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More Than We Ever Dreamed Possible

More Than We Ever Dreamed Possible

Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe’s Galileo Operations and Evolution.

Computational power continues to increase at a rapid pace and unlike other areas of technology, this trend is not expected to slow down in the foreseeable future. Software GNSS receivers fully exploit these developments to steadily increase performance.

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By Inside GNSS
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Playing by the Rules of World Trade Law

The availability of several GNSSes promises advanced positioning, navigation, and timing services with higher availability and improved accuracy. According to a European GNSS Agency (GSA) market study, nearly 60 percent of receivers, chipsets, and modules already support at least two GNSS constellations, showing that multi-constellation is becoming a standard feature across all market segments. That development brings up questions of law and regulation that require careful handling by GNSS manufacturers, service providers, and policy makers.

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By Ingo Baumann
Software-Defined GNSS Simulator: A Step Forward

Software-Defined GNSS Simulator: A Step Forward

A few studies (by universities and industry) have shown the feasibility of simulation of real-time digital intermediate frequency (IF) signals based on a graphics processor unit (GPU). And a couple of articles have also demonstrated use of a universal software radio peripheral (USRP)–based software-defined radio (SDR) as a simulator (in playback mode) in real test environments.

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By Inside GNSS
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First Position Fix with IRNSS

First Position Fix with IRNSS

Figure 1

The Indian Regional Navigation Satellite System (IRNSS) is an Indian Space Research Organisation (ISRO) initiative to build an independent satellite navigation system that provides precise position, velocity, and time (PVT) to users across the Indian region.

The primary objective of IRNSS is to achieve position accuracy of 20 meters (2σ) for dual-frequency users over India and the primary service area (a region extending to about 1,500 kilometers or 930 miles).

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By Inside GNSS
ESA/JRC International Summer School on GNSS 2015

ESA/JRC International Summer School on GNSS 2015

Casa Battló, Passeig de Gràcia, Barcelona, Spain

The European Space Agency (ESA) International Summer School on GNSS 2014 take place August 31 – September 10, 2015 at Hotel Alimara, Barcelona, Spain.

Held in conjunction with the European Commission Joint Research Center’s Summer School on GNSS, the program is open to graduate students (with a first university degree), Ph.D. candidates, early-stage researchers, and young professional seeking to broaden their knowledge.

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By Inside GNSS
LabSat SatGen GNSS Product Upgraded to Include BeiDou Signals
June 22, 2015

LabSat SatGen GNSS Product Upgraded to Include BeiDou Signals

SatGen V3 software now available for use on LabSat 3 simulators

LabSat has launched a new version of its SatGen V3 software package that enables users to create scenarios for replay through any LabSat simulator and now includes BeiDou.

The software creates either user-generated or imported trajectory files for use with a LabSat GNSS simulator. The addition of the BeiDou B1 signals means that users can now test a device’s design and performance as if it were being used within the operating area of the Chinese GNSS constellation – which at present only provides full coverage in Asia.

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By Inside GNSS
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