Engineers Invited to Explore GNSS Filters at JAVAD GNSS

January 3, 2012 - By

Javad Ashjaee, president and CEO of JAVAD GNSS, invites engineers "who want to roll up their sleeves" to a working session at his company's San Jose, California facility on Tuesday, January 17, to "find solutions and discuss technical details" related to the LightSquared/GPS conflict. read more

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On the Edge: History Underfoot

January 1, 2012 - By

Beneath the surface of a tropical paradise in the city of Townsville on Australia’s Sunshine Coast lies a hidden maze of tunnels and underground bunkers, once said to be used by General Douglas MacArthur. Learning the secrets of this labyrinth that was a major World War II staging point for battles in the Southwest Pacific is the passion of Kevin Parkes of Geo Positioning Services, Townsville. read more

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Out in Front: Big Bang Cheery

January 1, 2012 - By

A supersize bunch of pent-up GNSS just bust out all over. GLONASS is fully operational for the first time in more than 15 years. At least one Galileo in-orbit validation satellite broadcasts the new E1 and E5 signals, maybe both satellites by the time you read this. Compass has completed its regional navigation constellation. The first GPS III satellite testbed arrived at its integration and testing site in Colorado. The Russian SBAS is climbing back onto the air again. And QZSS has been quietly making progress, almost unnoticed. read more

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Expert Advice: Give Us This Day Our Daily Bread

January 1, 2012 - By

Across transportation, agriculture, industry, commerce, and finance, GPS has replaced earlier technologies, opened up innovative applications, and led to new ways of doing old things. GPS now plays a key role in the critical infrastructures of all industrialized nations, from the most sophisticated telecommunications system to the production of a simple loaf of bread. Wheat is the world’s second staple food, and bread its main product. Bakers have been around for 30,000 years. GPS, among its manifold other duties, now also helps bring us our breakfast toast and midday sandwich. read more

The System: Galileo in Its Glory

January 1, 2012 - By

  GALILEO PROTOFLIGHTMODEL satellite began transmitting E1 and E5 signals in early December. ESA reports them well within power and shape specifications, and suited for interoperability with GPS. The Galileo ProtoFlightModel (PFM) in-orbit validation (IOV) satellite GSAT0101 began transmitting E1 signals on December 10 using the E11 ranging code, and E5 signals early on December 14. Launched at the same... read more

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The Business — January 2012

January 1, 2012 - By

Download the PDF.   read more

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Innovation: Know Your Enemy

January 1, 2012 - By

Signal Characteristics of Civil GPS Jammers
GPS jamming is a continuing threat. A detailed understanding of how the available jammers work is necessary to judge their effectiveness and limitations. A team of researchers from Cornell University and the University of Texas at Austin reports on their analyses of the signal properties of 18 commercially available GPS jammers. read more

Straight Talk on Anti-Spoofing: Securing the Future of PNT

January 1, 2012 - By

Disruption created by intentional generation of fake GPS signals could have serious economic consequences. This article discusses how typical civil GPS receivers respond to an advanced civil GPS spoofing attack, and four techniques to counter such attacks: spread-spectrum security codes, navigation message authentication, dual-receiver correlation of military signals, and vestigial signal defense. Unfortunately, any kind of anti-spoofing, however necessary, is a tough sell. read more

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