水平線近傍の赤外線放射特性〔II〕

In this paper, the discussion about details of the results of observation on distribution of the sea surface radiation near the sea line which the authors have mentioned in thenprevious paper, and image processing of the thermograms are described. (1) The high radiance area near the sea line widen in the summer, and the sharpness of its distribution curve becomes about five times in the winter. (2) The high radiance area near the sea line is the special phenomenon in mid-infrared region (8～13μm band). (3) A temperature inversive layer increases the width of high radiance area near the sea line and promotes the lowering of contrast. (4) The high radiance area may possibly be extinguished very much on the season that the atmospheric temperature of lower layer is as same as the sea surface temperature. (5) The thermograms with few contrast become easy to discriminate by the image processing of binarization. (6) The thermograms of the sea surface become easy to grasp the sea surface condition and to discriminate minute target with high radiance by the expressive method of radiance difference