I am by no means an expert on the technical reasons for the interference with GPS, however, I work in the heavy highway construction industry and LightSquared's use of the spectrum is of real concern. The level of accuracy of current GPS guidance systems for construction equipment is astounding and enables significant improvements in job productivity over conventional practices.

I hope the truth and or a solution is discovered, as I do like the idea behind LightSquared and would use the service if available.