Submillimeter Fourier-transform spectrometer measurements of atmospheric opacity above Mauna Kea

E. Serabyn, E. W. Weisstein, D. C. Lis, J. R. Pardo
1998 Applied Optics  
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
more » ... 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 singlelayer 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.
doi:10.1364/ao.37.002185 pmid:18273141 fatcat:ad2u2yroxffljkyfd3btvgdsii