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Submillimeter observing conditions on Cerro Chajnantor

Radford, Simon J. E. and Giovanelli, Riccardo and Gull, George E. and Henderson, Charles P. (2008) Submillimeter observing conditions on Cerro Chajnantor. In: Ground-based and Airborne Telescopes II. Proceedings of SPIE. No.7012. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 70121Z. ISBN 9780819472229. https://resolver.caltech.edu/CaltechAUTHORS:20181112-102857523

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Abstract

Consistently superb observing conditions are crucial for achieving the scientific objectives of a ground based telescope. For observations at submillimeter wavelengths, choosing a site with very little atmospheric water vapor is paramount. In northern Chile, the high Andes near San Pedro de Atacama are among the highest and driest places on Earth. At the 5000 m Chajnantor plateau, long term measurements have demonstrated observing conditions are excellent for submillimeter astronomy. Even better conditions prevail on higher mountain peaks in the vicinity. For the CCAT, we have selected a candidate site at 5612 m near the summit of Cerro Chajnantor. Radiosonde measurements, meteorological data, and measurements of the 350 Consistently superb observing conditions are crucial for achieving the scientific objectives of a ground based telescope. For observations at submillimeter wavelengths, choosing a site with very little atmospheric water vapor is paramount. In northern Chile, the high Andes near San Pedro de Atacama are among the highest and driest places on Earth. At the 5000 m Chajnantor plateau, long term measurements have demonstrated observing conditions are excellent for submillimeter astronomy. Even better conditions prevail on higher mountain peaks in the vicinity. For the CCAT, we have selected a candidate site at 5612 m near the summit of Cerro Chajnantor. Radiosonde measurements, meteorological data, and measurements of the 350 μm transparency all indicate submillimeter observing conditions are consistently better at the CCAT site than at the plateau. transparency all indicate submillimeter observing conditions are consistently better at the CCAT site than at the plateau.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.789335DOIArticle
ORCID:
AuthorORCID
Giovanelli, Riccardo0000-0001-8884-8492
Additional Information:© 2008 Society of Photo-optical Instrumentation Engineers (SPIE). We thank our friends who have contributed to these results, including C. Achermann, R. Bustos, N. Oyarce, R. Reeves, M. Uehara, A. Otárola, R. Blundell, and S. Paine. We thank Y. Yoshii and M. Doi for the access road on Cerro Chajnantor. The measurements were made with the agreement and support of the CONICYT and the U. Chile. This research was partially supported by the National Science Foundation.
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Funding AgencyGrant Number
NSFUNSPECIFIED
Subject Keywords:atmosphere, site testing, radio telescope
Series Name:Proceedings of SPIE
Issue or Number:7012
Record Number:CaltechAUTHORS:20181112-102857523
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20181112-102857523
Official Citation:Simon J. E. Radford, Riccardo Giovanelli, George E. Gull, Charles P. Henderson, "Submillimeter observing conditions on Cerro Chajnantor," Proc. SPIE 7012, Ground-based and Airborne Telescopes II, 70121Z (17 July 2008)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90840
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:13 Nov 2018 18:22
Last Modified:09 Mar 2020 13:18

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