The LightSquared cellular data network has been proven to interfere with the GPS system. LTE is a new “4G” cellular data technology; LightSquared is a new wholesale provider of the service. The spectrum that GPS uses is extremely close to the upper bands of LightSquared’s licensed spectrum. Multiple independent tests reported in online and print resources such as AOPA (Aircraft Owners and Pilots Association) have proven the incompatibility of the systems; the spectrum of the GPS and LightSquared LTE systems are very close and the high power of the LightSquared LTE network overpowers GPS signals. The GPS system has become vital to transportation systems throughout the United States and the world. The aviation community in the United States particularly depends on GPS. Without GPS, aircraft



