A rapid method for measuring the figure of a radio telescope reflector

Details A rapid method for measuring the figure of a radio telescope reflector A rapid method for measuring the figure of a radio telescope reflector

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mnras.178..539s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 178, Mar. 1977, p. 539-545.

Astronomy and Astrophysics

Astronomy

37

Fourier Transformation, Instrument Errors, Radiation Measurement, Radio Telescopes, Reflectors, Apertures, Astronomical Maps, Contours, Diffraction Patterns, Error Analysis, Gravitational Effects, Phase Error, Zenith

Scientific paper

The well-known Fourier transform relationship between the complex illumination function and the diffraction pattern of an aperture has been applied to measurements of the reception patterns of dishes of the 5-km telescope. The results have provided contour maps showing the distribution of reflector surface errors with an accuracy of approximately 0.1 mm. By repeating the measurements at different zenith angles, the structural deflections due to gravity were investigated.

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