Technical writer Bob Cringely puts some holes in the recent GAO report on the statistic possibility of future GPS signal degradation. While his argument doesn’t clearly state how GPS assists in landing planes, he does point out why the report seems to be politically motivated by reporting the situation in the worst possible light.
I, Cringely » Blog Archive » WAAS Up? – Cringely on technology.
Could it be that some polititians have an interest in the recently unfunded eLORAN system?
GPS Satellite Failure and eLORAN Backup System – Popular Mechanics.