WIDE SPECTRAL RANGE IR FOURIER-TRANSFORM SPECTROMETER FOR ATMOSPHERICRESEARCH FROM SPACECRAFT

Fourier-spectrometer has been developed to study the surface and atmos phere of Mars from the orbit of the Mars satellite. Spectrometer compr ises two Michelson interferometers, operating with the same electromec hanical driver for simultaneous measurements in spectral regions 1.2 t o 5 mum and 7 to 50 mum, two detectors on PbSe and LiTa, test channels of monochromatic (I = 0.6328 mum) and ''white'' lights, a servo align ment system, a thermostabilizing system and a heat-removing wire to co ol (190-degrees-K) the PbSe detector. The spectral resolution on two-s ided interferogram is 1 cm. The registration time for each interferogr am is 4.3 seconds. Possibilities of using Fourier-spectrometer for the monitoring of the Earth atmosphere and other applications are conside red.