多源SAR影像監(jiān)測礦區(qū)建筑物三維位移場
發(fā)布時間:2019-08-01 08:09
【摘要】:合成孔徑雷達差分干涉(差分InSAR)技術僅能獲取雷達視線向(LoS)一維形變信息.通過分析LoS向形變的三維空間合成模型,研究了融合多源合成孔徑雷達(SAR)影像求解建筑物三維形變的模型與算法.該算法利用具有不同空間幾何的SAR影像獲取目標在不同LoS向的形變信息,聯(lián)合求解目標三維形變場.結果表明:三維算法反演的垂直向位移(即下沉)與水準數(shù)據(jù)相互吻合,均方根誤差為士10 mm;東西向水平位移場符合開采沉陷規(guī)律.由于衛(wèi)星采用極軌飛行,使得三維算法對南北向位移不敏感,反演精度差;由三維位移場計算的傾斜值以及東西向水平變形與實測值間的均方根誤差分別為±0.21,±0.06 mm/m.
[Abstract]:The differential interferometric (differential InSAR) technique of synthetic aperture radar (SAR) can only obtain the one-dimensional deformation information of radar line-of-sight (LoS). Based on the analysis of the three-dimensional spatial synthesis model of LoS deformation, the model and algorithm of combining multi-source synthetic aperture radar (SAR) images to solve the three-dimensional deformation of buildings are studied. In this algorithm, SAR images with different spatial geometry are used to obtain the deformation information of the target in different LoS directions, and the 3D deformation field of the target is solved jointly. The results show that the vertical displacement (that is, subsidence) inversed by the three-dimensional algorithm is consistent with the leveling data, and the root mean square error is 10 mm; east-west horizontal displacement field in accordance with the law of mining subsidence. Because the satellite flies in polar orbit, the three-dimensional algorithm is insensitive to the north-south displacement and the inversion accuracy is poor. The inclination value calculated by the three-dimensional displacement field and the root mean square error between the east-west horizontal deformation and the measured value are 鹵0.21 mm/m. and 鹵0. 06 mm/m., respectively.
【作者單位】: 中國礦業(yè)大學國土環(huán)境與災害監(jiān)測國家測繪局重點實驗室;中國測繪科學研究院;中國礦業(yè)大學(北京)地球科學與測繪工程學院;
【基金】:國家高技術研究發(fā)展計劃(863)項目(2011AA120402) 國家自然科學基金項目(41272389,41071273) 江蘇高校優(yōu)勢學科建設工程項目(SA1102) 地理空間信息工程國家測繪地理信息局重點實驗室基金項目(201303)
【分類號】:TN957.52
本文編號:2521632
[Abstract]:The differential interferometric (differential InSAR) technique of synthetic aperture radar (SAR) can only obtain the one-dimensional deformation information of radar line-of-sight (LoS). Based on the analysis of the three-dimensional spatial synthesis model of LoS deformation, the model and algorithm of combining multi-source synthetic aperture radar (SAR) images to solve the three-dimensional deformation of buildings are studied. In this algorithm, SAR images with different spatial geometry are used to obtain the deformation information of the target in different LoS directions, and the 3D deformation field of the target is solved jointly. The results show that the vertical displacement (that is, subsidence) inversed by the three-dimensional algorithm is consistent with the leveling data, and the root mean square error is 10 mm; east-west horizontal displacement field in accordance with the law of mining subsidence. Because the satellite flies in polar orbit, the three-dimensional algorithm is insensitive to the north-south displacement and the inversion accuracy is poor. The inclination value calculated by the three-dimensional displacement field and the root mean square error between the east-west horizontal deformation and the measured value are 鹵0.21 mm/m. and 鹵0. 06 mm/m., respectively.
【作者單位】: 中國礦業(yè)大學國土環(huán)境與災害監(jiān)測國家測繪局重點實驗室;中國測繪科學研究院;中國礦業(yè)大學(北京)地球科學與測繪工程學院;
【基金】:國家高技術研究發(fā)展計劃(863)項目(2011AA120402) 國家自然科學基金項目(41272389,41071273) 江蘇高校優(yōu)勢學科建設工程項目(SA1102) 地理空間信息工程國家測繪地理信息局重點實驗室基金項目(201303)
【分類號】:TN957.52
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