#sky_wave__skywave  a radio wave that is reflected back to earth by the ionosphere or a communications satellite; permits transmission around the curve of the earth's surface
  supertype:  #radio_wave__radiowave__radio_emission__radioemission__radio_radiation__radioradiation  an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m
  subtype:  #ionospheric_wave__ionosphericwave  a sky wave that is reflected by the ionosphere

No statement uses or specializes #sky_wave; click here to add one.