IR OBSERVATIONS OF KOSI SAMPLES

The thermal images received during the experiments KOSI 9, KOSI 10, KO SI 10A and KOSI 11 by a scanning infrared camera sensitive in the wave -length region 3-5 mu m are discussed. The common features and the dif ferences of the thermal behaviour of the samples during the different experiments are analysed. The results are compared with the data deliv ered by a nonimaging radiometer working in the wavelength region 8-14 mu m. The main points of the discussion are the phenomena caused by th e inhomogeneous character of the thermal surface processes. The observ ed distributions of the temperature on the surfaces of the samples wer e not static and are, therfore, not correlated with peculiarities of t he sample preparation. This fact illustrates the complicated character of the thermal processes on the surface of an insolated ice-dust mixt ure.