%0 Journal Article
%T A study on the maximum and minimum detectable deformation gradients resolved by InSAR<br>InSAR可检测的最大最小变形梯度的函数模型研究
%A JIANG Mi
%A LI Zhi-Wei
%A DING Xiao-Li
%A ZHU Jian-Jun
%A FENG Guang-Cai
%A YIN Hong-Jie
%A <br>蒋弥
%J 地球物理学报
%D 2009
%I 
%X The phase noise in a SAR interferogram is the function of both interferometric coherence and multilook number. In InSAR, except the hardware limitation, the maximum and minimum detectable deformation gradients are directly affected by interferometric phase noise. In addition, multilook operation will alter the size of pixels and thus the maximum and minimum detectable deformation gradients. This paper investigates the relationship among the maximum/minimum detectable deformation gradient, the multilook number and the coherence, and establishes the empirical function models of the maximum/minimum detectable deformation gradients for multilook number 1, 5 and 20. Experimental results with Envisat ASAR data over the area of Bam, Iran show that the new models can accurately judge whether a given ground deformation can be resolved by InSAR. Comparing with the model incorporating only coherence information, the new model is more accurate and comprehensive.
%K Interferometric synthetic aperture radar (InSAR)
%K Bam earthquake
%K Deformation gradient
%K Coherence
%K The look number
%K Envisat ASAR Sensor<br>合成孔径雷达干涉测量
%K Bam地震
%K 形变梯度
%K 相干性
%K 视数
%K Envisat
%K ASAR传感器
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=919EB95A18BC5748DDF37F5EF4117947&yid=DE12191FBD62783C&vid=286FB2D22CF8D013&iid=DF92D298D3FF1E6E&sid=6FA25BADCDFACCA5&eid=A84A3AD26CE1D4D2&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=1&reference_num=23