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The V-STARS Photogrammetry system was used to perform
a very-high-accuracy deformation measurement of a 22m diameter antenna
for the CSIRO. The telescope is one of five that make up the 'radio synthesis
telescope' - the only one in the southern hemisphere. The application
was carried out at the Paul Wild Observatory near Narrabri, NSW. The surveys
quantified the amount of deformation occurring in the main reflector,
quadrapods and sub reflector, as the dish was moved through various orientations.
The measurement data was then used to quantify how much the antenna's
shape deviated from its nominal design, which in turn affects the signal
gain. The data can also be used to adjust the main reflector panels to
improve the dish's gain.
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