The astronomical unit determined by radar reflections from Venus : article, 1962 Apr. 5.

Jet Propulsion Laboratory (U.S.)

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The Jet Propulsion Laboratory (JPL) is a research and development center and NASA field center in Pasadena, California. The JPL is owned by NASA and managed by the nearby California Institute of Technology. The laboratory's primary function is the construction and operation of planetary robotic spacecraft, though it also conducts Earth-orbit and astronomy missions. It is also responsible for operating NASA's Deep Space Network. Among the laboratory's major active projects are the Mars Scien...

Holdridger, D. B.

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Muehlman, D. O.

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Block, N.

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