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Archives for August 23, 2011
Is your business dependent on GPS? If so, a recent editorial penned by Marc Cheves and Gavin Schrock of The American Surveyor Magazine may get your attention. The pair offered up the following in the most recent edition of the popular magazine for the Professional Surveyor’s Community…
The LightSquared issue refuses to go away. After the presentations by LightSquared and the Coalition to Save Our GPS at the Survey Summit in July, it seemed that if LightSquared stayed in the lower band of the two bands adjacent to GPS, its plan might work. Since then, it has become apparent that even that band is unacceptable. Here’s the situation: the bands that LightSquared is seeking to use have always been reserved for space-based transmissions. Because LightSquared has convinced the FCC to allow it to make terrestrially-based transmissions, the problem becomes one of signal strength. Signals from space have been described as whispers, and the GPS manufacturers have done a marvelous job of extracting useable information from these weak signals, even being able to sort out GPS signals from signals that are millions of times stronger. LightSquared, with its terrestrial scheme, broadcasts signals that are billions of times stronger than GPS. The bottom line for us is that we simply cannot coexist with LightSquared in bands that are adjacent to the GPS signals.