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• W1979514778 abstract "The performance of single dish radio antennas or telescopes is depending on the surface accuracy of the reflectors in the beam path and the focus/pointing errors induced by deviations/misalignment of the reflectors from a desired direction. For multiple dish VLBI arrays an additional mechanical effect, the path length stability, is a further source of performance degradation. For application at higher frequencies environmental influences as wind and temperature have to be considered additionally to the usually required manufacturing and alignment accuracies. Active measurement (metrology) of the antenna deformations and their compensation by active optics (AO) respectively flexible body compensation (FBC) are established methods. For the path length errors AO or FBC are up to now not established methods. The paper describes how to handle the path length errors and the related metrology analogues to the established methods used for surface and focus/pointing error corrections." @default.
• W1979514778 created "2016-06-24" @default.
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• W1979514778 date "2010-07-16" @default.
• W1979514778 modified "2023-09-23" @default.
• W1979514778 title "Path length errors of VLBI antennas" @default.
• W1979514778 doi "https://doi.org/10.1117/12.856030" @default.
• W1979514778 hasPublicationYear "2010" @default.
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