Phase Retrieval Measurements of Antenna Surfaces Using Astronomical Sources

Details Phase Retrieval Measurements of Antenna Surfaces Using Astronomical Sources Phase Retrieval Measurements of Antenna Surfaces Using Astronomical Sources

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ursi.confe...2n&link_type=abstract

Proceedings of the URSI General Assembly, August 2002, Maastricht, the Netherlands

Physics

Optics

Scientific paper

We present a novel technique for accurate measurement of the large-scale errors in an antenna surface using astronomical sources and detectors. Out-of-focus images of compact astronomical sources contain a wealth of information about the telescope optics. By characterising the surface as a sum of Zernike polynomials, it is possible to infer in a stable manner the surface of the telescope using an inverse-problem numerical technique. We report preliminary results using data from the 15-m James Clerk Maxwell Telescope and the 100-m Green Bank Telescope, and discuss the merits of this technique for measuring the large scale deformation of telescope antennas.

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