Subrahmanyan, R. (2005) Photogrammetric measurement of the gravity deformation in a Cassegrain antenna IEEE Transactions on Antennas and Propagation, 53 (8). pp. 2590-2596. ISSN 0018-926X
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Official URL: https://ieeexplore.ieee.org/document/1492610/
Related URL: http://dx.doi.org/10.1109/TAP.2005.851836
Abstract
Photogrammetric measurement of the gravity deformation in a 22-m Cassegrain antenna of the Australia Telescope Compact Array is described. The deformation in the main reflector surface and displacements of the quadripod structure, subreflector and feed were surveyed at a set of antenna elevations. The elevation dependance of the antenna radiation pattern, calculated from the deformations and displacements, are in good agreement with measurements. This experience is another novel demonstration of the usefulness of photogrammetry in antenna metrology: as a tool for measurements of the gravity-induced structural deformation in reflector surfaces and of the displacements and rotations in optics elements of large steerable antennas.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Electrical and Electronic Engineers. |
| Keywords: | Reflector Antennas; Antenna Measurements; Radio Astronomy |
| ID Code: | 114289 |
| Deposited On: | 22 May 2018 06:15 |
| Last Modified: | 22 May 2018 06:15 |
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