Astron. Astrophys. Suppl. Ser. 132, 413-416
A. Greve1 - R. Neri1 - A. Sievers2
Send offprint request: A. Greve
1 - IRAM, 300 rue de la Piscine, 38406 St. Martin d'Hères, France
2 - IRAM, Nucleo Central, Avda. Divina Pastora 7, 18012 Granada, Spain
Received February 9; accepted May 6, 1998
The residual surface deformations of an optimized homologous radio reflector produce an elevation dependent gain variation for which astronomical observations must be corrected. For the IRAM 30-m telescope we provide information, and an example, how to correct observations of point-like and extended sources.
We find agreement between the gain-elevation dependence predicted from the finite element structural calculations and radiometric measurements on the telescope.
Key words: telescopes
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