Abstract
view Abstract Citations (1) References (2) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Venusian and lunar radar depolarization experiments Levy, Gerald S. ; Schuster, Danver Abstract From March 10, 1961, to May 10, 1961, Venusian and lunar If the depolarized component of about 12 db were produced by radar measurements were made at the Goldstone Tracking Station a reflection in which the transmitting and receiving circularly of the Deep Space Instrumentation Facility as a portion of an polarized antennas as well as the reflector remain fixed with respect interplanetary communications research program. Depolarization to each other, the axial ratio of the elliptical polarization would phenomena were investigated at an operating frequency of 2388 be 4.5 db. The axial ratio was measured by installing a linear Mc using a circular polarizer unit for the transmitter and receiver rotatable feed system in the receiving antenna. The axial ratio antenna feeds. The normal mode of operation was to transmit of the received signal from Venus was of the order of 1 db, right-hand secondary circular polarization (RCP) and receive but the signal was extremely noisy. The lunar axial ratio was left-hand secondary circular polarization (LCP); the procedure about 0.5 db. was reversed for comparative results. Mismatched polarization The over-all results of the depolarization experiments in- echo signal strengths (RCP to RCP and LCP to LCP) were com- dicated that the Venusian data were similar to those of the pared with matched strengths (RCP to LCP and LCP to RCP). moon (lunar depolarization can be attributed to surface scat- The results indicated that Venusian depolarized signal strengths tering); however, there were insufficient data to support firm were down 10.7+2 db to 13.4+2 db from the matched strengths; conclusions. the moon's signal strength was down 11+2 db. Publication: The Astronomical Journal Pub Date: June 1962 DOI: 10.1086/108734 Bibcode: 1962AJ.....67..320L full text sources ADS |
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