Citation
Abstract
Aperture efficiency measurements made during 1988 on the three 70-m stations (DSS-14, DSS-43, and DSS-63) at X-band (8420 MHz) and S-band (2295 MHz) have been analyzed and reduced to yield best estimates of antenna gain versus elevation. The analysis has been carried out by fitting the gain data to a theoretical expression based on the Ruze formula. Newly derived flux density and source-size correction factors for the natural radio calibration sources used in the measurements have been used in the reduction of the data. Peak gains measured at the three stations were 74.18 (40.10) dBi at X-band, and 63.34 (40.03) dBi at S-band, with corresponding peak aperture efficiencies of 0.687 (40.015) and 0.762 (40.006), respectively. The values quoted assume no atmosphere is present, and the estimated absolute accuracy of the gain measurements is approximately +0.2 dB at X-band and t0.1 dB at S-band (1-a values).
Details
- Volume
- 42-97
- Published
- May 15, 1989
- Pages
- 314–351
- File Size
- 1.2 MB