Polar stratospheric clouds (PSCs) generated during the Antarctic winter were detected using the CO
2 slicing method with thermal infrared band (band 4) data observed by the main sensor of the Greenhouse gases Observation SATellite (GOSAT), Thermal infrared And Near infrared Sensor for Observation Fourier Transform Spectrometer (TANSO-FTS). This method uses pseudo-channels consisting of actual channels in the spectral range of 700-750 cm
-1 with almost identical sensitivity of peak altitudes. The best combination of these pseudo-channels is selected for each analysis of observed data based on simulation studies. This method was applied to analyze GOSAT data obtained during June-September 2010. The occurrences of PSCs were compared with those from CALIPSO data. Results show that horizontal distributions analyzed from data from these two sensors are particularly consistent over the Antarctic Peninsula and the eastern area of the peninsula to within the difference in sensitivities of the sensors. However, results show that this method is ineffective in the highlands, areas with extremely low surface temperatures, and ocean areas where the temperature lapse rate is extremely low. Although the vertical distribution of PSCs detected by the method for GOSAT data shows different features from those by CALIPSO, they show a similar tendency by which altitudes of PSC decrease gradually during the observation period. The method presented herein is also effective to obtain optical properties in the atmospheric window region for various types of PSCs, and it provides us with important information on atmospheric radiation field with PSCs.
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