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Minttu Uunila
Type of contribution: poster

An experimental scanning of the Mets{"a}hovi radio telescope dish

Minttu Uunila, Aalto University Mets{"a}hovi Radio Observatory Ulla Kallio, Finnish Geospatial Research Institute Antero Kukko, Finnish Geospatial Research Institute Harri Kaartinen, Finnish Geospatial Research Institute Juha Kallunki, Aalto University Mets{"a}hovi Radio Observatory Henry R{"o}nnberg, Aalto University Mets{"a}hovi Radio Observatory

An experimental scanning of the Mets{"a}hovi radio telescope dish was carried out in August 2014. We investigated a possibility to detect and estimate the elevation angle dependent deformations of the dish using terrestrial laser scanner. In this presentation we describe the practical organization of the experiment, instrumentation, measurements and quality of the data. We also describe the functional and stochastic model and algorithms which were used in data processing, paraboloid fitting, and the analysis of the solutions. The experiment shows that the terrestrial laser scanner is suitable for the focal length estimation. The analysis of the results reveals also possible deformations of the quadrapod structure. For investigating the surface of the dish we would like to repeat the measurements with more high accuracy.