Recent advances in submillimiter remote sensing of the stratosphere

The capability of remote-sensing measurements of the stratosphere in the submillimetric spectral region is presented. The analysis is discussed of spectra recorder by a balloon-borne Fourier Transform spectrometer that measures the emission of the atmosphere in the submillimetric with the limb-scanning observation technique. Two problems, that have been studied with submillimetric spectroscopy, are presented in detail: the measurement of HBr and the diurnal variability of hydroxyl radical.