摘要
2014年8月3日16时30分，云南省鲁甸县发生6．5级地震，地震造成两岸山体塌方形成堰塞湖。在堰塞体右岸边坡有大量岩体崩塌，坡度为70°～90°，部分地方有倒悬体，常规手段难以布设仪器监测。故采用先进的GB—SAR系统IBIS—L对右岸裸露新岩体进行变形监测，通过此方式获取的GB-SAR影像质量直接关系到干涉图的生成、相位滤波和相位解缠。该研究根据IBIS-L采集的云南鲁甸红石岩堰塞湖边坡监测数据。通过Kaiser—Bessel窗进行加窗处理后，选用估计热信噪比（TSNR）、时间和空间相关系数、相位稳定性等能够直接表征观测相位的稳定程度特征量，间接分析了GB—SAR影像采集的质量好坏，为进行连续高质量的影像选择提供依据。
At 4：30 p.m. on August 3, 2014, the 6.5 earthquake occurred in Ludian County of Yunnan Province. The earthquake caused landslides on both sides and resulting a Barrier lake, a large number of rock collapsed in the right bank slope of damming body. The slope is between 70-90 degrees with overhanging structure in some places, so conventional method is difficult to lay the instrument monitoring. Therefore, using advanced GB-SAR system IBIS-L to do deformation monitoring for the exposed rock on the right bank. GB-SAR image quality obtained in this way is directly related to the generation of the interferograms, phase filtering and phase unwrapping. In this paper, the barrier lake slope monitoring data acquisition based on IBIS-L in Hongshiyan Ludian Yunnan Province. Using the Kaiser-Bessel window while focusing the range profile, the stability of the GB-SAR image acquisition is analyzed by the estimation of the thermal signal to noise ratio （TSNR）, temporal and spatial coherence, phase stability, provided the basis for continuous high-quality image selection.
出处
《安徽农业科学》
CAS
2015年第36期379-381,共3页
Journal of Anhui Agricultural Sciences
