อ้างอิง ของ วงโคจรค้างฟ้า

  1. ↑ Noordung, Hermann (1995) [1929]. The Problem With Space Travel. Translation from original German. DIANE Publishing. p. 72. ISBN 978-0-7881-1849-4. Unknown parameter |coauthors= ignored (|author= suggested) (help)
  2. ↑ "(Korvus's message is sent) to a small, squat building at the outskirts of Northern Landing. It was hurled at the sky. … It … arrived at the relay station tired and worn, … when it reached a space station only five hundred miles above the city of North Landing." Smith, George O. (1976). The Complete Venus Equilateral. New York: Ballantine Books. pp. 3–4. ISBN 0-345-25551-8-185 Check |isbn= value: invalid prefix (help).
  3. ↑ "It is therefore quite possible that these stories influenced me subconsciously when … I worked out the principles of synchronous communications satellistes …", op. cit, p. x
  4. ↑ "Extra-Terrestrial Relays — Can Rocket Stations Give Worldwide Radio Coverage?" (PDF). Arthur C. Clark. October 1945. สืบค้นเมื่อ 2009-03-04.
  5. ↑ "Basics of Space Flight Section 1 Part 5, Geostationary Orbits". NASA. สืบค้นเมื่อ 2009-06-21.