M. S. Kiseleva

New methods of calculating the transmittance of the atmosphere, using the effective parameters of the atmosphere and optoelectronic systems

This paper presents the principles of new methods and programs for calculating the transmittance of the atmosphere in the 0.2-2.5-µm region. These methods are based on direct line-by-line computations and their description, using the effective amounts of the absorbing gases (the spectral transmittance) and taking into account the effective parameters of the optoelectronic systems (the overall transmittance).

Molecular spectroscopy method in the stratospheric ozone problem

The altitudinal ozone concentration profiles have been determined at altitudes 16-29 km with spectroscopic method of generalized argument. Experimental base of this method is the unresolved solar spectra. These spectra have been registrated in the region of v3 ozone band ((lambda) equals 9.6 micrometer, (Delta) (lambda) equals 0.05 micrometer) with balloon borne spectrometer. The balloon experiments have been realized at Rylsk (Russia) 08.08.90 and Aire sur Adour (France) 19.09.93. The generalized ozone absorption coefficients were obtained by using line-by-line calculations and the modern spectroscopic information on spectral line parameters. The investigation of altitudinal ozone concentration profiles was accompanied by simultaneous study of the aerosol extinction coefficient profiles for lambda equals 0.54 micrometer and lambda equals 0.81 micrometer ((Delta) (lambda) equals 0.012 micrometer). The altitudinal ozone and aerosol profiles presented here are compared with the results of early analogous investigations carried out by the authors of this report. the anticorrelation between the ozone concentration and the aerosol extinction coefficients is founded.

Spectroscopic information in the direct and back tasks of atmospheric analysis

The improved calculations method of spectral atmospheric transmittance in the 1 - 14 micrometer region at unresolved spectra structure ((Delta) (lambda) equals 0.025 - 0.05 micrometer) for arbitrary dispositions of a radiation source and a detector in the atmosphere at altitudes up to 60 km is considered. This method has been devised at S. I. Vavilov State Optical Institute (SOI). The broad use data of the modern spectroscopic information on atmospheric gases spectral lines parameters raised the accuracy of SOI-method as well as extended the application of this method to direct and back tasks of the spectral atmosphere analysis. The comparison of SOI-method and LOWTRAN one is given.

Interpretation of balloon spectra of atmospheric transmission in the 8.0-12μm region using the original spectral line database

In this work the atmospheric transmission spectra T equals f((lambda) ) were determined experimentally by the balloon experiments in the region of 8.0 - 12 micrometers with resolution about 5 cm-1. The balloon-borne spectrometers have three optical channels. Two channels are used for simultaneous registration of two solar spectra, the third one serves for the uninterrupted registration of the solar intensity during all the time of the flight in the two narrow spectral regions (0.02 micrometers ) obtained with the use of the interference filters at (lambda) equals 0.5 micrometers or (lambda) equals 0.8 micrometers . All the measurements were performed during lifting the apparatus at the positive sun heights hradii > 0 and during gliding at altitude about 30 km firstly at the positive and then at the negative solar heights.

Balloon-born investigations of total and aerosol attenuation continuous spectra in the stratosphere

Abstract not available.