论文部分内容阅读
概述了解释冰雪微波测量的物理背景。根据在瑞士阿尔卑斯山的测量结果,说明了各类雪的后向散射的角特性和光谱特性。讨论了与雪和冰川调查有关的SAR图象的信息量,并举例说明了海军卫星SAR和机载SAR图象。初步给出了用于雪和冰川监测的最佳SAR系统的技术参数。SAR的主要优越性是无天气依赖性,所以,SAR资料对调查冰雪的物理状态特别有意义。今后,SAR遥感器在雪和冰川监测系统中将成为重要的组成部分。但为了满足各类任务的需求,仍需要高分辨率的光学遥感器和改进后的被动微波遥感器。
An overview of the physical background that explains ice snow measurements. Based on the measurements in the Swiss Alps, the angular and spectral characteristics of various kinds of snow backscattering are described. The amount of information on SAR images related to snow and glacial surveys was discussed and examples of naval satellite SARs and airborne SAR images were illustrated. The technical parameters of the best SAR system for snow and glacier monitoring are given initially. The main advantage of SAR is weather-free, so the SAR data are of particular interest in investigating the physical state of ice and snow. In the future, SAR remote sensors will become an important part of snow and glacier monitoring systems. However, in order to meet the needs of various tasks, still need high-resolution optical remote sensor and improved passive microwave sensor.