Abstract
COMS (Communication, Ocean and Meteorological Satellite) is a geostationary satellite and was developed by KARI for communication, ocean and meteorological observations. COMS was tested under vacuum and very low temperature conditions in order to correlate thermal model and to verify thermal design. The test was performed by using KARI large thermal vacuum chamber. The COMS S/C thermal model was successfully correlated versus the 2 thermal balance test phases. After model correlation, temperatures deviation of all individual units were less than <TEX>$5^{\circ}C$</TEX> and global deviation and standard deviation also satisfied the requirements, less than <TEX>$2^{\circ}C$</TEX> and <TEX>$3^{\circ}C$</TEX>. The final flight prediction was performed by using the correlated thermal model.
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