【摘要】 升降轨干涉测量可以更好地反映地震同震形变场特征。利用欧空局ASAR数据通过二轨法差分干涉测量提取了新疆于田县Ms 7.3级地震升降轨同震形变场信息。结果显示:升轨同震形变场最大视线向(LOS)隆升形变量约+13.3 cm,沉降形变量约-83.9 cm;降轨同震形变场最大LOS向隆升形变量约+36.5 cm,沉降形变量约-66.5 cm。于田地震以NNE向正断层破裂为主,并伴随左旋走滑运动,西北盘为正断层破裂的上盘(沉降盘),东南盘为正断层破裂的下盘(隆升盘)。升降轨同震形变场存在一定差异,但其变化趋势与特征非常相似,其差异主要是由于两种不同观测模式所造成的。更多还原

【Abstract】 The Differential Interferometric Synthetic Aperture Radar(D-InSAR) based on the ascending and descending orbit data can better reveal the feature of coseismic deformation fields.With the ASAR data from European Space Agency(ESA) and two-pass D-InSAR measurement,this paper obtained both ascending orbit and descending orbit coseismic deformation fields of Yutian Ms7.3 Earthquake.The results show that the max LOS uplifting value is about +13.3 cm and the subsiding value is about-82.0 cm in the ascending-orbit coseismic deformation field,and the max LOS uplifting value is about +36.5 cm and the subsiding value is about-66.5 cm in the descending-orbit coseismic deformation field.The Yutian Earthquake is mainly rupturing along the NNE-trending normal fault with a little left-striking,the northwest plate is the hanging-wall(subsiding) of the normal fault,and the southeast plate is the footwall(uplifting) of the normal fault.The coseismic deformation fields of ascending and descending orbits are different from each other in some aspects,but their variable tendencies and characteristics are similar,and the difference is mainly due to the two different observation modes.更多还原