| 基于InSAR视角对基线精度的影响分析 |
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| 引用本文： | 董连凤,杨福芹,邢会敏.基于InSAR视角对基线精度的影响分析[J].测绘与空间地理信息,2015(3):28-30. |
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| 作者姓名： | 董连凤 杨福芹 邢会敏 |
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| 作者单位： | 1. 西安煤航信息产业有限公司,西安陕西,710000;2. 中国矿业大学，地球科学与测绘工程学院，北京100083;3. 商丘师范学院环境规划学院,河南商丘,476000 |
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| 基金项目： | 国家自然科学基金(u130440)；河南省教育厅项目---基于多源遥感卫星的中原经济区地面沉降机理研究 |
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| 摘 要： | 干涉合成孔径雷达中存在的基线误差会严重影响高程测量的精度问题。由于地球曲率的存在,地物点参考椭球半径在不同纬度地区与星下点的地球半径存在较大的差异,给出了雷达视角与基线的关系式。从雷达临界视角的角度,给出了临界基线的公式。结果表明在一幅影像图上,用一个点的基线值代替整张影像的基线值所产生的误差会传播到DEM以及形变的结果中。
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| 关 键 词： | InSAR 基线估计 距离-多普勒定位算法 基线误差 |
Effect of the Baseline Accuracy Based on InSAR Angle |
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| DONG Lian-feng,YANG Fu-qin,Xing Hui-min.Effect of the Baseline Accuracy Based on InSAR Angle[J].Geomatics & Spatial Information Technology,2015(3):28-30. |
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| Authors: | DONG Lian-feng YANG Fu-qin Xing Hui-min |
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| Institution: | DONG Lian-feng;YANG Fu-qin;Xing Hui-min;Xi’an Meihang Information Industry Co. Ltd.;College of Geoscience and Surveying Engineering,China University of Mining and Technology;Shangqiu Normal University; |
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| Abstract: | In the InterferometricSAR, the existence of the baseline error and height error of the satellite will affect the precision of the altitude information transformed from the interferometric phase.As the existence of earth curvature, Reference ellipsoid radius of the feature points have great difference with the ellipsoid radius of subsatellitepoint, the relationship between radar angle and baseline is presented.From the radar critical angle, the formula of the critical baseline is deduced.The results indicate that the error will be propagated to the DEM and the deformation results if a point of baseline value replaces the whole image of the baseline value in a shad-owgraph. |
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| Keywords: | InSAR baselineestimation range-doppler location algorithm baseline error |
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