Publications by authors named "Echle G"

For data analysis of the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) atmospheric limb emission spectroscopic experiment on Environmental Satellite microwindows, i.e., small spectral regions for data analysis, have been defined and optimized.

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In atmospheric Fourier transform spectroscopy so-called microwindows are usually analyzed for retrieval of trace constituents rather than the spectrum as a whole. These microwindows, which are sets of consecutive spectral grid points, contain one or more prominent transitions of the target species, whereas it is desirable for the signal of interfering species to be minimum. An objective, quantitative method is presented to optimize the microwindow boundaries with respect to random errors, signal of interfering species, other parameter and systematic errors and to select optimum microwindows with respect to their associated retrieval errors.

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It is generally accepted that multiple scattering is important for evaluating backscatter lidar signals in the case of moderate or high optical depths and large receiver fields of view. On one hand, multiple scattering must be considered in inverting signals to obtain backscatter coefficients; on the other hand, it offers the opportunity to derive microphysical parameters of the scattering medium. Bissonnette developed a numerical code for the propagation of a continuous-wave laser beam through an atmosphere including multiple scattering.

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