#NEXRAD :: Phased Array Radar - https://en.wikipedia.org/wiki/Phased_array + https://en.wikipedia.org/wiki/File:NEXRAD_NETWORK.jpg + https://authenticmentoring.wordpress.com/2015/02/17/gwen-towers-and-nexrad-infrasound-pulses-the-hum-the-rumble-and-booms-population-control/