SELECTION OF OPTIMIZED MICROWINDOWS FOR ATMOSPHERIC SPECTROSCOPY

In atmospheric Fourier transform spectroscopy so-called microwindows a re usually analyzed for retrieval of trace constituents rather than th e spectrum as a whole. These microwindows, which are sets of consecuti ve spectral grid points, contain one or more prominent transitions of the target species, whereas it is desirable for the signal of interfer ing species to be minimum. An objective, quantitative method is presen ted to optimize the microwindow boundaries with respect to random erro rs, signal of interfering species, other parameter and systematic erro rs and to select optimum microwindows with respect to their associated retrieval errors. Case studies for N2O microwindows are performed for a spaceborne Limb emission experiment to assess the dependence of the optimum microwindow width on the retrieval concept. (C) 1998 Optical Society of America. OCIS codes: 300.0300, 280.0280, 300.6300, 300.6340 , 010.1280, 000.4430.