Cellular networks such as LightSquared’s transmit at much higher power than do satellite-based systems — as much as 1 billion times as high, according to some critics. In tests, the LTE network overwhelmed GPS receivers, such as in-car navigation systems, that were trying to lock on to weaker signals coming from GPS satellites. At a Congressional hearing last week, federal officials and GPS industry representatives said interference with GPS could endanger critical systems and a thriving industry. GPS device sales total $20 billion per year, and about $3 trillion worth of commerce each year relies on the U.S.-built system, said Roy Kienitz, under secretary for policy at the U.S. Department of Transportation. Read More
