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Where the Action Is   August 25, 2010

Name the hottest test-bed for interoperability of multiple GNSS in user applications. North America, cradle of global satellite positioning, navigation, and timing? Close, but as the saying goes, no cigar. Europe, the up and coming? You’re getting colder. Russia, rocketeer of the once and future...More>>

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Stonewalling GPS Vulnerability   June 23, 2010

On February 8, the United States began shutting down its 20-odd Loran transmitters. The International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA), of which the United States is a member, continually recommends the use of eLoran as back up for GNSS, and is moving...More>>

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IIF and the Woolly Mammoth   June 9, 2010

There are any number of topics I could and probably should have written about this month, but no matter where I look there is this Woolly Mammoth in the room that has been and continues to be impossible to ignore. Most writers would equate the virtual presence to an elephant, but this particular...More>>

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Road Widening Ahead   May 27, 2010

Depending on how fast a mail-opener you are, we may have entered a new era by the time you reach the end of this sentence. The first IIF satellite could at this very moment be spaceborne. After a handful of delays, the launch was most recently set back to a window of Thursday, May 29, 11–11:19...More>>

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A New Perspective: SVN-49 and L5 Revisited   May 12, 2010

It seems that everywhere I go these days, someone wants to discuss the future of SVN-49 or IIR-20(M) which, although it has PRN01 assigned and is enroute to its new orbit location as part of the enhanced 24 constellation, has never been set healthy. Everyone has an opinion and most aren’t shy...More>>

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A Satellite, Some Signal Specs, and, Sorry, A Step Sideways   April 28, 2010

Galileo has forged ahead on two fronts, satellite readiness and signal specification. The payload for the first in-orbit validation (IOV) Galileo satellite traveled on April 26 from its birthplace in Portsmouth, UK, to Rome for pairing with its space-vehicle platform. Earlier, the European...More>>

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Compass Delegates Share Status   March 23, 2010

The Munich Satellite Navigation Summit conference, now in its eighth year, has assumed increasing importance on the international circuit of GNSS policymakers and communicators. Although with a decidedly European bent, it draws representatives from most if not all systems to mingle and present. A...More>>

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GPS AEP 5.5C, the Rest of the Story: We Went to the Source   February 24, 2010

If you are interested in the Global Positioning System (GPS) and are not related to Rip Van Winkle, then you have heard about the controversy surrounding the latest AEP ground control segment software upgrade, designated as version 5.5C.More>>

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It's a Mad, Mad, Maddenless World   February 10, 2010

Call it Madden withdrawal. It’s bad enough that I just endured Super Bowl “XLIV” without the smooth and engaging color commentary of the iconic John Madden, the legendary Hall of Fame, Super Bowl (XI) winning coach and virtual football entrepreneur. This year I patently missed John’s pithy...More>>

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Up Close and Personal with SVN-49   January 27, 2010

Intimates reveal options discussed, debated, and tested in classified labs to ameliorate the spurious signals dealt by the IIR-M satellite launched in March 2009. The predicted long procession of papers generated by the SVN49 signal anomaly got officially underway here at the ION National Technical...More>>









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