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用InSAR技术从雷达图像获取DEM的质量控制 总被引：1，自引：0，他引：1
该文阐述利用InSAR技术生成DEM的过程,比较使用不同参数处理ERS数据所获得的不同试验结果,分析了产生差异的因素,为提高处理结果精度进行了有益的尝试,最后总结出干涉处理过程中影响结果精度的三个主要因素和关键点。 相似文献
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Based on Single-Link Cluster (SLC) analysis,a new method to identify the foreshocks andaftershocks of a strong shock from the earthquake catalogue and then to form a sequencecatalogue has been proposed in this paper.In the SLC frame,there are many chains formedby links with lengths shorter than or equal to the characteristic length Lc.It is defined thatwhen some of these chains connect with a strong shock,the seismic events on such chainsfirm a sequence with the strong shock.In this sequence,the strong shock is the main shock;the events preceding the main shock are foreshocks and those following the main shock areaftershocks.By using this method,the foreshocks and aftershocks associated with the M_s7.4Haicheng earthquake and with the strong shocks of M_s≥6.0 in the top area of Kunlun-AltunArc were identified and sequence catalogues for these strong shocks were set up. 相似文献
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Zhou Huilan Liu Zhen and Gao YuanGraduate School University of Sciences Technology of China Beijing China 《中国地震研究》1998,(1)
By using the SLC(Single-Link Cluster)method,this study worked in three respects:(a)set up three-dimensional(3-D)SLC software that can deal with a large catalogue of earthquakes and analyze the characteristics of earthquakes' clustering and scattering in time-space:(b)defined several parameters to describe the distinguishing feature for the SLC frame and developed a technique to calculate the 3-D SLC frames and these parameters with gradual time-sliding,and inspected their variations with time,especially before large events; and(c)by using these means,treated the earthquake catalogue in the top area of the Kunlun-Altun-Arc as well as some valuable results that had been obtained. 相似文献
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单键群方法与昆仑山—阿尔金山弧型构造顶部地震时空群集特征 总被引：9，自引：2，他引：9
本文以单键群分析方法为基础，进行以下研究；１．对一个地区的地震目录进行分析得到特征键开，并用其对该区地震的时空群集性和离散性进行分析，进而建立分类子目录，以便作针对性的细致处理；２．定义了几个描述ＳＬＣ构架特点的参数，发展和实现了按时间逐段滑移计算ＳＬＣ构架和这些参数的办法及程序，考察这些参数随时间的变化；３．用以上各软件处理昆仑山阿尔金山弧型顶部区域的地震目录，得到了一些有意义的结果。 相似文献
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Chromite deposits associated with layered anorthosite complexes in the Archaean high-grade terranes are rare in the world. The late Archaean Sittampundi Layered Magmatic Complex, Tamil Nadu, India is one of the few such deposits in the world where layers of Fe-Al rich chromites are associated with extremely calcic (An>95) anorthosite. ‘Frozen in’ magmatic mineralogy of the chromitite and the enclosing anorthosite suggest successive crystallization of chromite + clinopyroxene and chromite + clinopyroxene + anorthite from a hydrous Al-rich basaltic melt that was emplaced in a suprasubduction zone setting. Intense deformation and upper amphibolite facies metamorphism at ∼2.45 Ga converted the magmatic assemblages to hitherto unreported hornblende + gedrite + Mg-Al rich spinel ± chlorite bearing assemblages. During metamorphic reconstitution, chromite was pseudomorphically replaced by green spinel in the domains rich in secondary amphiboles. Mass-balance calculation and algebraic analyses of the observed mineralogy suggest that a number of chemical species including chromium became mobile during the formation of spinel pseudomorph in response to infiltration driven metamorphism. Aluminium became mobile in the length scale of chromite grain but remained immobile in the length scale of a thin section. 相似文献
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识别前震余震的单键群方法 总被引：3，自引：0，他引：3
本文提出一种从地震目录中识别强震的前震和余震并形成序列目标的新方法,即：以单键群（ＳＬＣ）分析方法为基础,定义在ＳＬＣ构架中,由于小于或等于特征键长的键所形成的许多链中,那些处在某个强震联通的链上的地震就与该强震构成一个地震序列;在此序列中,该强震为主震,之后的为余震,用此方法,可以按强震逐个识别其前震余震,并形成其序列目录。我们用它识别处理了海城７．４级和昆仑山－阿尔金山弧型顶部地区６．０级以上 相似文献
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利用合成孔径雷达干涉测量技术获取地表三维信息的研究，受到世界各国的广泛关注。高精度复影像配准是InSAR数据处理的关键步骤，其结果直接影响生成干涉相位的质量，进而影响获取数字高程模型的精度。本文采用相干系数法进行粗配准，采用基于相干系数拟合的方法进行精配准，可以实现复影像数据的高精度配准。经机载和星载数据的试验验证，该方法有效可行且运算效率高，具有实用性。 相似文献
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以河套地震带作为研究区域,选取2001年以来小震事件作为研究对象,采用单键群(SLC)方法,计算研究区地震空间相关长度,并分区域讨论其时序变化特征。计算结果表明,2001年以来,河套地震带5个子区域地震空间相关长度表现出不同变化特征,且无持续性变化,多在约3年时间尺度上表现出增长现象,表明地震空间相关长度的增长变化不太可能反映区域应力场的长期变化,而可能携带应力场的中期变化信息。通过设定不同计算窗长和滑动步长来考证计算结果,发现地震事件时空分布的非均匀性、空间窗形状和大小等因素,可能影响地震空间相关长度的数据变化幅度,但不影响整体变化趋势。 相似文献