DARPA wanted to work on it as well (look up "Total Domain Awareness"), but I think the power vs jam resistance (even against non-intentional emissions, such as

DARPA wanted to work on it as well (look up "Total Domain Awareness"), but I think the power vs jam resistance (even against non-intentional emissions, such as a broken computer/microwave or a malfunctioning localizer) tradeoff is just not tractable at this point.