Vol. 20, issue 03, article # 9

pdf Virolainen Ya. A., Polyakov A. V., Timofeev Yu. M. Remote sensing of temperature and gas composition of the atmosphere using ground-based Fourier transform infrared spectrometers. // Atmospheric and oceanic optics. 2007. V. 20. No. 03. P. 229-233.
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We have developed a methodology and a software package for implementation of the technology of ground-based remote sensing of the atmosphere using Fourier transform spectrometers (FTS) with the spectral resolution from 0.1 to 1 cm-1 (of the FTIR-2 type). This technology makes it possible to measure the altitude profiles of temperature and moisture content, as well as the content of some trace gases in the atmosphere (ozone, methane, etc.) based on the spectra of thermal IR radiation measured with FTS. The software package developed has been tested using an array of experimental data acquired with an OASIS FTS. We present examples of interpretation of the spectra of downwelling thermal IR radiation, as well as analyze the reconstruction of atmospheric parameters by comparing thus obtained results with the data of independent measurements. This comparison demonstrated that practically for all measurements coordinated in time the temperature profiles obtained with radiosondes and from data of interferometric measurements for the atmospheric boundary layer coincide accurate to 1-1.5К. Discrepancy between the column density of water vapor obtained from radiation measurements and from radiosonde data does not exceed 5%. The discrepancy between interferometric measurements of the total ozone content and data acquired with TOMS satellite does not exceed 3-7%.