Abstract: A bidirectional multibeam transmit-reflect-array (TRA) antenna has been proposed for the space–air–ground–sea integrated network (SAGSIN). The TRA consists of alternating transmission ...
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SETI tunes twinkling pulsars to sync cosmic clocks and chase ET
Pulsars are some of the most reliable metronomes in the universe, and scientists are now using their flickering radio beams to keep time across the galaxy and sharpen the search for intelligent life.
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