Theoretical and Experimental Determination of the Near‐Field Correction for Backscatter Gain at the Arecibo Observatory | Zendy

Steinfeld A. H. | Zendy; Brice N. M. | Zendy; Conrad J. C. | Zendy; LaLonde L. M. | Zendy

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Theoretical and Experimental Determination of the Near‐Field Correction for Backscatter Gain at the Arecibo Observatory

Author(s) -

Steinfeld A. H.,

Brice N. M.,

Conrad J. C.,

LaLonde L. M.

Publication year - 1971

Publication title -

radio science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.371

H-Index - 84

eISSN - 1944-799X

pISSN - 0048-6604

DOI - 10.1029/rs006i012p01079

Subject(s) - backscatter (email) , optics , feed horn , reflector (photography) , radar , physics , incoherent scatter , remote sensing , line (geometry) , geology , scattering , antenna (radio) , radiation pattern , periscope antenna , mathematics , telecommunications , computer science , wireless , light source , geometry

During the summer of 1968, two‐beam, incoherent‐scatter radar measurements were made at Arecibo. The two beams were formed by two separate feeds for the Arecibo reflector, one a line feed which illuminated essentially all of the reflector, and the other a horn feed which effectively illuminated about 500 feet of the reflector. A by‐product of this experiment was the calibration of the near‐field correction to the backscatter gain of the line‐feed system. This was obtained by comparing the power received as a function of range in the two radar systems. The measured loss of gain in the near field for the line feed was about 1.5 db at a height of 100 km.

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