Citation
Abstract
The surface panels of the 64-m main reflector are presently set to a prescribed paraboloid at 45 deg elevation angle. Rotation about the elevation axis to the horizon or zenith attitude introduces additional root-mean-square (rms) distortions due to the change in the direction of the gravity vector with respect to the symmetric axis. This article proposes a method of reducing the humps or bumps over the unyielding “hard” portions of the elevation wheel assembly supporting the reflector structure, thus reducing the rms distortions due to gravity for the structure. The bumps can be effectively removed by controlling the height of the panels above the reflector structure by means of mechanical leverage connections to the elevation motion, thus maintaining the simplicity and reliability of the reflector system. A table of overall rms distortions resulting from the summations of various options is included.
Details
- Volume
- 42-23
- Published
- October 15, 1974
- Pages
- 92–97
- File Size
- 403.9 KB