Theoretical and Experimental Determination of the Near-Field Correction for Backscatter Gain at the Arecibo Observatory
Article first published online: 7 DEC 2012
Copyright 1971 by the American Geophysical Union.
Volume 6, Issue 12, pages 1079–1084, December 1971
How to Cite
1971), Theoretical and Experimental Determination of the Near-Field Correction for Backscatter Gain at the Arecibo Observatory, Radio Sci., 6(12), 1079–1084, doi:10.1029/RS006i012p01079., , , and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Received: 5 NOV 1970
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.