Study on the Prospection Techniques by Remote-sensing and Chemical Analysis

地下场地的探测通常采用电磁法，但这些方法的研究范围都很小。此外，这些方法并没有教我们很多关于历史背景的知识。我们的研究计划开发一种光学勘探方法，以获得广泛的研究范围和化学方法，以了解该网站的特性。我们研究了来自卫星、飞机和气球的几个站点的光谱和热信息。我们还分析了从不同深度的土芯中采集的土壤样品。研究结果表明，土壤表面的温度、发射率和光谱的差异与地下场地的位置相对应。从飞机或气球上拍摄的照片将有助于在日本的前景。化学分析表明，人类长期生活的土层和非人类生活的土层有机质含量存在差异。然而，与其他勘探方法一样，其结果需要仔细检查。

Underground sites are usually examined by electric or magnetic methods but a research areaof these methods is limited to rether small. Furthermore these methods do not teach us much about a historical background. Our research was planned to develop an optical prospection method for getting a wide research area and a chemical one for knowing the characteristics of the site. We studied spectral and thermal information of several sites from satellites, airplanes and balloons. We also analyzed soil samples taken from different depths of soil cores. The results of the study showed differences of temperature, emissivity and spectra at a soil surface correspond to the location of an underground site. Photographs from airplane or balloons will be useful for the prospect ion in Japan. The chemical analysis showed the difference of the quantity of organic substances contained in two soil layrs ; a layr where human beings lived longtime and one not. the result, however, needs a careful examination like as other prospection methods.