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Fernmeßverfahren mit FTIR-Spektrometrie und Laser Doppler. Messung von Abgasen des Heizkraftwerks München-Nord

Remote sensing of mass fluxes of trace gases in the boundary layer


Umweltwissenschaften und Schadstoff-Forschung : UWSF. Zeitschrift für Umweltchemie und Ökotoxikologie 8 (1996), No.3, pp.143-149 : Ill., Lit.
ISSN: 0934-3504
ISSN: 1865-5084
Journal Article
Fraunhofer IFU; 2002 in Helmholtz-Gesellschaft integriert
air pollution; clean air activity; Fernerkundung; Fourier-transform infrared emission spectroscopy; FTIR; integrated measurement concept; integriertes Meßverfahren; laser doppler anemometry; Laser-Doppler-Windfernmessung; Luftreinhaltung; Luftverschmutzung; remote sensing

The combination of remote sensing methods like Doppler lidar and FTIR allows remote determination of mass fluxes of gases. Doppler lidar measures the three-dimensional wind vector in the vicinity of diffuse sources, or the velocity of air in a chimney plume if an industrial complex is monitored. FTIR is a multicomponent remote sensing method for gas concentrations. The Fourier transformation of an interferogram of a Michelson interferometer within a FTIR system converts the recorded intensity (function of optical path length) to a spectral signal (function of wavenumber). Both information, velocity and concentration, give the mass fluxes of the tracer (gas). A first test was performed at Munich-Nord power station with FTIR and cw-Doppler lidar. Fluxes Of CO2, CO, NO, and HCl were determined. The results are in good agreement with the fluxes measured by in situ instruments of the power station. The method can be used to control industrial complexes from an outside observation site.