Statistics – Applications
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988itap...36.1481k&link_type=abstract
IEEE Transactions on Antennas and Propagation (ISSN 0018-926X), vol. 36, Oct. 1988, p. 1481-1484.
Statistics
Applications
1
Error Analysis, Metrology, Photogrammetry, Reflector Antennas, Target Acquisition, Theodolites, Australia, Data Processing, Microprocessors
Scientific paper
A description is given of some refinements to the traditional theodolite and tape technique for surveying the reflector surface of large antennas. The theolodite is positioned in the structural axis about 40 cm above the antenna vertex. There are six rings of panels, ranging in size from 1.4 x 0.7 to 2 x 2 m, with 160 panels in all in each antenna. Targets are placed near the corners of each panel. In brief, each target's position is defined by two measurements: its distance from the theolodite and the angle between the antenna axis and the line of sight to target, the zenith angle. The equipment and the procedures used are reported. The accuracy achieved in each measurement and the consequent panel positional accuracy are discussed. In recent applications (to radio telescope antennas 18 and 22 m in diameter), rms surface accuracies of 0.25 mm have been achieved.
Kesteven Michael J.
Parsons Barry F.
Yabsley Don E.
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