CAJ | 학술논문

用雷达卫星(RADARSAT)合成孔径雷达(SAR)和防卫气象卫星(DMSP)特别微波成像辐射计(SSM/I)在1999年1月23日同一天对中国渤海区域海冰的观测数据，进行了主动SAR与被动SSM/I的组合研究. 用一层海冰电磁散射辐射的建模与数值模拟，分析了中纬度渤海沿岸海冰的特征性变化，提出用SSM/I辐射亮度温度的散射指数、极化指数、极化比率来识别渤海海冰；用RADARSAT高分辨率SAR数据(水平极化后向散射系数)对渤海海冰物理特征进行识别与分类. 这些特征指数在时间与空间尺度上的相关变化可有效地应用于渤海海冰的监察.
용뢰체위성(RADARSAT)합성공경뢰체(SAR)화방위기상위성(DMSP)특별미파성상복사계(SSM/I)재1999년1월23일동일천대중국발해구역해빙적관측수거，진행료주동SAR여피동SSM/I적조합연구. 용일층해빙전자산사복사적건모여수치모의，분석료중위도발해연안해빙적특정성변화，제출용SSM/I복사량도온도적산사지수、겁화지수、겁화비솔래식별발해해빙；용RADARSAT고분변솔SAR수거(수평겁화후향산사계수)대발해해빙물리특정진행식별여분류. 저사특정지수재시간여공간척도상적상관변화가유효지응용우발해해빙적감찰.
The shoreice at middle latitudes, such as in the China’s Bohai Sea, Huanghai Sea, is lasted only for few months during the winter. Its physical constitutes and temporal-spatial variability are different from the polar regions. In this paper the sea ice detection and classification are presented on the basis of the image data from active RADARSAT SAR and passive DMSP SSM/I measurements over the Bohai Sea ice in January 23, 1999. By using numerical modeling of scattering and radiative transfer of a layer of sea ice, characteristic variation of the Bohai Sea shoreice is studied. The scattering index (SI), polarization index (PI), and the polarization ratio (PR) from passive observation of the brightness temperature (TB) are defined to detect the existence of sea ice. Further, using cohorizontally polarized back-scattering (σhh) measured by the RADARSAT high resolution SAR, the sea ice of the Bohai Sea can be further classified. Temporal and spatial variations of these indexes can be used to monitor the sea ice of the Bohai Sea.