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Astron. Astrophys. Suppl. Ser.
Volume 132, Number 3, November_I 1998
Page(s) 413 - 416
DOI: 10.1051/aas:1998303

Astron. Astrophys. Suppl. Ser. 132, 413-416

The gain-elevation correction of the IRAM 30-m telescope

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

Copyright The European Southern Observatory (ESO)