This gorgeous chart illustrates the intricacies of managing one of our nation’s most crucial—and invisible—national assets: the radio spectrum. Somewhere above you right now, a plane is broadcasting its location, speed, and bearing on 1090 MHz. A geostationary weather satellite 22,000 miles from Earth is transmitting detailed weather maps on 1694.1 MHz. A car driving by your home is transmitting a signal with the pressure readout of one of its tires at 315 MHz.