Analysis of the alidade temperature behaviour of the Medicina VLBI radiotelescope

Details Analysis of the alidade temperature behaviour of the Medicina VLBI radiotelescope Analysis of the alidade temperature behaviour of the Medicina VLBI radiotelescope

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ap%26ss.239..247a&link_type=abstract

Astrophysics and Space Science, Volume 239, Issue 2, pp.247-258

Astronomy and Astrophysics

Astrophysics

3

Radiotelescopes Pointing, Thermal Analysis, Fea Analysis, Thermal Shields

Scientific paper

Upgrading existing radiotelescopes to operate at higher frequencies requires not only a better reflecting surface accuracy, but also more precise pointing capability. To analyse the thermal behaviour of the 32 metre VLBI parabola at Medicina, we have installed accurate temperature sensors on the pedestal beams of the antenna and an inclinometer at the elevation axis. The thermal model presented here, starts from a structural Finite Elements Analysis of the radiotelescope and can closely predict the deformations measured by the inclinometer, even in the worst solar radiation conditions. This analysis allows also insights into future improvements.

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