【摘要】：針對SAR干涉點目標分析技術(shù)在區(qū)域地表形變監(jiān)測中僅能在一定程度上消除大氣延遲效應(yīng)的問題,采用鄰域差分的思想來減弱差分干涉相位中的自相關(guān)影響。采用附加距離限制的Delaunay三角網(wǎng)進行PS基線網(wǎng)絡(luò)的布設(shè),可以有效剔除距離較長的基線邊和低質(zhì)量的PS點目標,并利用鄰接矩陣對PS基線網(wǎng)絡(luò)中的重復(fù)邊進行檢測與刪除,以提高程序的計算效率。首先利用模擬數(shù)據(jù)對程序的有效性與正確性進行驗證,然后以大同-西安客運專線太谷-祁縣段為研究對象,選取2015-07~2016-02的8景TerraSAR數(shù)據(jù)進行實例分析,獲取的高鐵沿線形變與已有地裂縫調(diào)查資料和野外實地考察資料具有較高的一致性,證明了PS基線網(wǎng)絡(luò)在線性工程形變監(jiān)測應(yīng)用中的可行性。
[Abstract]:In order to solve the problem that SAR interference point target analysis technique can only eliminate the atmospheric delay effect in regional surface deformation monitoring to a certain extent, the idea of neighborhood difference is used to reduce the autocorrelation effect in differential interference phase. The Delaunay triangulation network with additional distance restriction can effectively eliminate the long distance baseline edge and low quality PS point target, and use the adjacent matrix to detect and delete the repeated edges in the PS baseline network in order to improve the computational efficiency of the program. Firstly, the validity and correctness of the program are verified by the simulation data. Then, taking the Taigu-Qixian section of Datong-Xi'an passenger dedicated line as the research object, the 8-scene TerraSAR data of 2015 / 07 / 2016 / 02 are selected for example analysis, and the obtained deformation along the high-speed railway is in good agreement with the existing ground fissures survey data and field investigation data, which proves the feasibility of the PS baseline network in the application of linear engineering deformation monitoring.
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本文編號：2516921