Physics – Optics
Scientific paper
Apr 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apopt..37.2185s&link_type=abstract
Applied Optics LP, vol. 37, Issue 12, pp.2185-2198
Physics
Optics
20
Scientific paper
We present accurately calibrated submillimeter atmospheric transmission spectra obtained with a Fourier-transform spectrometer at the Caltech Submillimeter Observatory on Mauna Kea, Hawaii. These measurements cover the 0.9 0.3-mm wavelength range and are the first in a series aimed at defining the terrestrial long-wave atmospheric transmission curve. The 4.1-km altitude of the Mauna Kea site provides access to extremely low zenith water-vapor columns, permitting atmospheric observations at frequencies well above those possible from sea level. We describe the calibration procedures, present our first well-calibrated transmission spectra, and compare our results with those of a single-layer atmospheric transmission model, AT. With an empirical best-fit continuum opacity term included, this simple single-layer model provides a remarkably good fit to the opacity data for H 2 O line profiles described by either van Vleck Weisskopf or kinetic shapes.
Lis Darek C.
Pardo Juan Ramon
Serabyn Eugen
Weisstein Eric Wolfgang
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