Lightsquared is dead (these are the guys who wanted to build a low-priced fiber network)

[Indydem]

4. Educate yourself

"But GPS equipment designed to provide accuracy to within a centimeter or better would still suffer. These high-end units are susceptible to interference because they were purposefully designed with relatively broad RF filters on their front ends. This allows them to sense the timing of GPS waveforms very precisely and also facilitates the reception of what are known as augmentation signals—high-precision corrections to standard GPS location fixes. Awkwardly, these corrections are sometimes broadcast from satellites on frequencies in the mobile-satellite band, near those LightSquared's new system would use.

Can those GPS receivers be modified to cope, perhaps with the augmentation signals being sent on other frequencies? Sure. But it may be too late for calm discussion of such technical fixes. In a December 2011 request to the FCC, LightSquared backed away from its earlier conciliatory offer, arguing that "unlicensed commercial GPS receivers simply are not entitled to interference protection from LightSquared's licensed operations in the [mobile satellite service] band." "Now it's a slugfest," says Barker."

Aviation GPS units, farming equipment, even military GPS receivers were all in jeopardy, and when Lightsquared decided to be assholes, their goose was cooked.