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Bistatic Radar

NSSDCA ID: 1966-078A-06

Mission Name: Luna 11


The bistatic radar experiment, designated Kassiopeya KYa-4, was designed to determine the dielectric constant of the upper few meters of the Moon's surface. The experiment would transmit a 1.7 meter wavelength radio wave from lunar orbit. An Earth ground station would receive the transmission directly from the spacecraft and the reflection of the transmission from the Moon. Comparison of the two returns would provide information on the near-surface dielectric constant.

On Luna 11, 65 reliable measurements were made from 30 August to 27 September 1966. Analysis of the measurements indicated a dielectric constant of approximately 3.

Alternate Names

  • Luna11/RadioAstronomy
  • Radio Astronomy

Funding Agency

  • Russian Space Agency (U.S.S.R)


  • Planetary Science: Geology and Geophysics

Additional Information

Questions and comments about this experiment can be directed to: Dr. David R. Williams



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