Ei. Shkelev et al., A SPECTROMETER FOR THE 3-MM BAND WITH PARALLEL AND SERIES ANALYSIS, Instruments and experimental techniques, 38(6), 1995, pp. 783-785
A multichannel microwave radiometer was designed for the 90-110-GHz ba
nd using modulation, double frequency conversion, and parallel and ser
ies spectral analysis in order to probe the Earth's atmosphere at the
rotational lines of molecules.