Citation
Abstract
The gain, phase, and pointing performance of the DSN 70-m antennas are investigated using theoretical antenna analysis computer programs that consider the gravity-induced deformation of the antenna surface and quadripod structure. The microwave effects are calculated for normal subreflector focusing motion and for special fixed-subreflector conditions that may be used during the Voyager 2 Neptune encounter, The frequency stability effects of stepwise lateral and axial subreflector motions are also described. Comparisons with recently measured antenna efficiency and subreflector motion tests are presented, A modification to the existing 70-m antenna pointing squint correction constant is proposed.
Details
- Volume
- 42-95
- Published
- November 15, 1988
- Pages
- 237–245
- File Size
- 504.1 KB