日本长崎大学后藤惠之辅教授的研究小组,开发了根据地球观测卫星的数据来推断海域水深的方法。这一方法是利用来自海底的太阳光线的反射来测量水深的。它最多可测量38米水深,误差约1m,该小组准备进一步改进这一方法,减少误差,同时收集比实验海域水质差的区域观测数据,以便更接近实用化。他们利用了美国陆地卫星5号0.52—0.6μm波段的数据,以冲绳岛金武湾为对象,进行了试验性的深度测量计算,并对海底不同地质的区域进行了比较。另外,根据海上保安厅提 A research team led by Professor Goto Kisebuchi of Nagasaki University in Japan developed a method of inferring the depth of a sea area based on data from Earth observation satellites. This method measures water depth using the reflection of the sun’s rays from the sea floor. It can measure up to 38 meters of water depth with an error of about 1m. The group is prepared to further improve this method to reduce errors while collecting regional observations of water quality worse than those in the experimental sea areas in order to be more practical. Using the data of the 0.52-0.6μm band of the United States Landsat 5, they conducted a tentative depth measurement calculation for the Jinwu Bay, Okinawa, and compared the different geologic areas on the seafloor. In addition, according to the Marine Security Department mentioned