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beacon – n. a radio signal that is broadcast to help guide ships, airplanes, etc.
forecast – n. to say that (something) will happen in the future
geostationary – adj. moving in orbit in space along the equator, so that it remains stationary to a fixed point on the surface
sophisticated – adj. highly developed and complex
transponder – n. a device that receives a radio signal and sends out a signal in response and that is used especially to show the location of something
