sentences:  PAGEOS
  
  PAGEOS (PAssive Geodetic Earth Orbiting Satellite) was a balloon satellite which was launched by NASA in June 1966.PAGEOS had a diameter of exactly , consisted of a thick mylar plastic film coated with vapour deposited aluminium enclosing a volume of and was used for the Weltnetz der Satellitentriangulation (Worldwide Satellite Triangulation Network) – a global cooperation organized by Hellmut Schmid (Switzerland & USA) 1969-1973.