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Ground-based millimeter-wave observations of water vapor emission (183GHz) at Atacama, Chile

Ground-based millimeter-wave observations of water vapor emission (183GHz) at Atacama, Chile

Authors :
M. Matsuura
Hiroyuki Maezawa
Shin'ichiro Asayama
Akira Mizuno
A. Morihira
T. Sugimoto
T. Kuwahara
Tomoo Nagahama
Norikazu Mizuno
Toshikazu Onishi
S. Murayama
Yasuo Fukui
N. Toriyama
Source :
Advances in Space Research. 42:1167-1171
Publication Year :
2008
Publisher :
Elsevier BV, 2008.

Abstract

We report the first results of ground-based millimeter-wave measurements of 183 GHz atmospheric water vapor spectra from Atacama highland (4800 m alt.), Chile. The measurements were carried out in December 2005 by using a spectroscopic radiometer equipped with a superconductive heterodyne receiver. A conspicuous H 2 O spectrum at 183 GHz was detected with an integration time of only 1.5 min, and this is the first high frequency-resolution H 2 O spectrum at 183 GHz obtained in the southern subtropical region. The vertical profile of H 2 O volume mixing ratio between 40 and 64 km were retrieved from the spectrum by using the modified optimal estimation method.

Details

ISSN :
02731177
Volume :
42
Database :
OpenAIRE
Journal :
Advances in Space Research
Accession number :
edsair.doi...........c89ad4b08d6927c8465b270e2bc975e9
Full Text :
https://doi.org/10.1016/j.asr.2007.11.030