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对海洋上空卫星测得的近红外波段辐射所反映的信息进行理论分析，表明卫星近红外波段图像上反映的是海况信息。1986年11月5日陆地卫星TM6图像显示胶州湾海表温度的波状分布，TM2，TM3，TM4波段彩色合成图显示胶州湾的悬浮泥沙含量分布和泥沙运动。TM4图像显示在海洋波动和风力作用下的海况，并用实测潮汐资料、气象信息解译胶州湾海况。在胶州湾中、西部，悬浮泥沙含量较高，而TM4波段辐射值较低，图像阴暗，较高的泥沙含量并没有提高TM4波段的辐射值。胶州湾东部，悬浮泥沙含量较低，而TM4波段辐射值较高，图像明亮。TM4波段辐射值并不反映泥沙含量和海底深度，它们仅提供海洋表面粗糙度或海况信息。
The theoretical analysis of the information reflected by the near-infrared radiation measured by satellites over the ocean shows that the information on the sea state is reflected in the images of the near-infrared satellite. November 5, 1986 Landsat TM6 image shows the wave distribution of the sea surface temperature in Jiaozhou Bay. The color composite maps of TM2, TM3 and TM4 bands show the suspended sediment distribution and sediment movement in Jiaozhou Bay. The TM4 image shows the sea state under the influence of ocean wave and wind force, and interprets the sea state of Jiaozhou Bay with the measured tide data and meteorological information. In Jiaozhou Bay, the content of suspended sediment is high in the middle and western part of China, while the radiation value of TM4 band is low and the image is dark. The higher sediment content does not increase the radiation value of TM4 band. In eastern Jiaozhou Bay, suspended sediment content is low, while TM4 band radiation value is high, the image is bright. TM4 band radiation does not reflect the sediment content and depth of the sea, they only provide information on sea surface roughness or sea conditions.