Calculation of absorption and dispersion spectra of atmospheric gases: at millimetre-wavelengths

Author

Papatsoris, A.D. ; Watson, P.A.

Author_Institution

Dept. of Electr. Eng., Bradford Univ., UK

Volume

140

Issue

6

fYear

1993

fDate

12/1/1993 12:00:00 AM

Firstpage

461

Lastpage

468

Abstract

Absorption and dispersion spectra of the most important and millimetre-wave active atmospheric gases for arbitrary atmospheric paths are calculated. The atmospheric propagation model (APM) adopts a line by line summation technique too characterise the resultant resonant absorption and dispersion spectra of various trace constituents such as O₃, N₂O, CO, NO, NO₂, SO₂, ClO, HNO₃, NH₃ and major contributors H₂O and O₂. The model assumes a spherically layered atmosphere with each layer taken to be in local thermodynamic equilibrium and with exponential profiles of density and pressure between layer boundaries. The relative air mass integral and the line shape function are also appropriately evaluated

Keywords

atmospheric electromagnetic wave propagation; atmospheric spectra; electromagnetic wave absorption; radiowave propagation; CO; ClO; H₂O; HNO₃; N₂O; NH₃; NO; NO₂; O₂; O₃; SO₂; absorption; atmospheric gases; atmospheric paths; atmospheric propagation model; density; dispersion spectra; line by line summation technique; line shape function; local thermodynamic equilibrium; millimetre-wavelengths; pressure; relative air mass integral; resonant absorption; trace constituents;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings H

Publisher

iet

ISSN

0950-107X

Type

jour

Filename

260103