【摘要】 <正>冰川雷达探测主要采用调制脉冲雷达系统。其基本原理是向冰川发射载波频率为几十至几百兆周的无线电波,接收来自冰川内部或底部反射的回波,藉此来测定冰川的厚度,研究冰川的内部构造、温度和运动状况等。由于冷性冰川冰对电磁波的吸收率很小,吸收系数一般小于几分贝/100米,相对介电常数也较稳定,一般为3.2左右;冰川体(尤其是冷性冰川)一般较均匀。因此,有利于雷达探测技术的应用。六十年代初,首先在极地冰川上使用雷达探测技术,成功地取得了冰层厚度的资料。此种方法适合在飞机上测量,具有快速、经济、准确的特点。目前,已成为冰川学研究的重要技术手段之一。一九七九年五月,我们首次在祁更多还原

【Abstract】 This paper presents some results of experiment by radio-echo sounding on a mountain glacier,the Yanglong River Glacier,Qilian Shan,China, with a 160 MHz pulse-radar system, a radio-echo sounder. Bottom echoes were observed distinctly on the radio-echo sounder.The ice depth at every point was calculated and the profiles of ice thickness were obtained. At the same time, some weak echoes were recorded also, possibly induced by the interior structure of the Glacier and some irregular echoes appeared also to be eliminated in the future.更多还原