Title :
Surface adjustment of the IRAM 30 m radio telescope
Author :
Morris, Dan ; Bremer, Marshall ; Butin, G. ; Carter, M. ; Greve, A. ; Lamb, J.W. ; Lazareff, B. ; Lopez-Perez, Jose ; Mattiocco, F. ; Penalver, J. ; Thum, C.
Author_Institution :
Inst. de Radioastronom. Millimetrique (IRAM), St. Martin d´Heres
fDate :
2/1/2009 12:00:00 AM
Abstract :
The techniques used to set and stabilise the surface of the IRAM 30 m radio telescope to a final root mean square accuracy of about 50 m are described. This involved both phase retrieval and phase coherent holography using a variety of radiation sources at several frequencies. A finite-element model was utilised in improving the temperature control system for the telescope structure. The factors influencing the ultimate surface accuracy are discussed.
Keywords :
finite element analysis; holography; radiotelescopes; temperature control; IRAM radio telescope; distance 30 m; finite-element model; phase coherent holography; phase retrieval holography; surface adjustment; telescope structure; temperature control system;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map:20080044
