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echo satellite造句

"echo satellite"是什么意思  
造句與例句手機(jī)版
  • :: A balloon can certainly exist in a vacuum : for example, the Echo satellites were balloons.
  • The Echo satellite was a balloon satellite launched into Earth orbit in 1960 and used for passive relay of radio communication.
  • In 1960 NASA launched an Echo satellite; the aluminized PET film balloon served as a passive reflector for radio communications.
  • One of its objectives was to intercept the US Echo satellite, which was a passive, nitrogen-filled balloon covered in reflective foil and thus highly visible as it passed overhead.
  • During her time at NASA, she not only oversaw the tracking of the Echo Satellites, but also contributed to seminars on A Programming Language and a article published by NASA about documenting computer code.
  • The first attempt to orbit an Echo satellite ( also the maiden voyage of the Thor-Delta launch vehicle ) miscarried when Echo 1 lifted from Cape Canaveral's LC-17A on the morning of May 13, 1960.
  • "' Melba Roy Mouton "'( died 1990 ) was an Echo Satellites 1 and 2, and she worked up to being a Head Computer Programmer and then Program Production Section Chief at Goddard Space Flight Center.
  • Image : Horn Antenna-in Holmdel, New Jersey . jpeg | Holmdel Horn Antenna in Holmdel, New Jersey Built to support the Echo satellite communication program, it was later used in experiments that revealed the cosmic background radiation permeating the universe.
  • According to John R . Pierce, of Bell Labs, who was involved in the Echo satellite and Telstar projects, he gave a talk upon the subject in 1954 ( published in 1955 ), using ideas that were " in the air ", but was not aware of Clarke's article at the time.
  • It's difficult to see echo satellite in a sentence. 用echo satellite造句挺難的
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