Citation
Abstract
The gravity load distortion rms (half path length) values are calculated for the hour angle-declination angle (H A-dec) antenna by computing the positions of the three principal axes fixed on the reflector structure, but rotating in declination and hour angle. For a symmetric structure, the rms values are equal to the results from the standard square root of the sum of the squares equation. For unsymmetric structures, the required modifications to the equation are described. Contour level plots for a sample 27.4-m HA-dec antenna show the variations of the rms with respect to selected surface panel setting positions. Also plotted are the X, Y, and Z load components for the panels set at zenith look.
Details
- Volume
- 42-27
- Published
- June 15, 1975
- Pages
- 139–147
- File Size
- 629.8 KB