本文選題：干涉圖 + 去平地　； 參考：《電子科技大學(xué)》2013年碩士論文

【摘要】：滑坡是一種破壞力很大的常見(jiàn)自然地質(zhì)災(zāi)害，其能夠引起泥石流以及山體垮塌，會(huì)造成人民生命財(cái)產(chǎn)安全及國(guó)家建設(shè)的巨大損失。因此對(duì)滑坡進(jìn)行監(jiān)測(cè)，是減少滑坡災(zāi)害危害性的有效方式。隨著干涉合成孔徑雷達(dá)技術(shù)（InSAR）的發(fā)展，，合成孔徑雷達(dá)差分干涉測(cè)量（D-InSAR）作為其擴(kuò)展應(yīng)用，具有寬覆蓋率、高空間分辨率、全天時(shí)、全天候、大區(qū)域性、高靈敏度等特點(diǎn)，且對(duì)地表的微小形變具有厘米級(jí)別甚至更小尺寸精度的探測(cè)能力，可以獲取高精度、高分辨率的地面高程信息，并通過(guò)滑坡災(zāi)害前后兩幅干涉圖像的比對(duì)，達(dá)到精密測(cè)定滑坡前后的地表形變的效果，因此本文采用D-InSAR技術(shù)應(yīng)用于小型滑坡的形變信息提取研究。 本論文系統(tǒng)地闡述了合成孔徑雷達(dá)差分干涉技術(shù)應(yīng)用于滑坡信息提取的發(fā)展歷程、應(yīng)用現(xiàn)狀、SAR成像原理以及INSAR基本原理，并在此基礎(chǔ)上深入應(yīng)用研究了D-INSAR技術(shù)主要處理流程，并對(duì)其中的主要算法做了深入討論與分析，并運(yùn)用編程軟件進(jìn)行編程以實(shí)現(xiàn)主要算法的功能。主要研究?jī)?nèi)容包括以下幾個(gè)部分：將配準(zhǔn)后的兩幅主、輔圖像形成干涉條紋圖、將干涉條紋圖進(jìn)行平地效應(yīng)去除處理、相位噪聲濾波、相位解纏、高程轉(zhuǎn)換及形變提取。并根據(jù)RADARSAT-2提供的SAR數(shù)據(jù)對(duì)D-INSAR技術(shù)的主要算法進(jìn)行了數(shù)據(jù)處理及算法驗(yàn)證。其中基于軌道參數(shù)的去平地效應(yīng)方法，直接擬合衛(wèi)星軌道方程，避免多次迭代的復(fù)雜運(yùn)算，運(yùn)算效率得以提高。并對(duì)幾種濾波方法進(jìn)行殘差點(diǎn)數(shù)目、信噪比、條紋邊緣保持完整性進(jìn)行分析，得出自適應(yīng)中值濾波法具有較好濾波效果的結(jié)論。且采用路徑跟蹤法中的枝切法進(jìn)行了相位解纏處理，該算法優(yōu)點(diǎn)在于運(yùn)行時(shí)間短。最后對(duì)具有滑坡信息的SAR圖像進(jìn)行了D-INSAR處理提取了滑坡的地表形變信息，結(jié)果表明D-INSAR技術(shù)能提取小型滑坡厘米級(jí)別的微小形變信息。
[Abstract]:Landslide is a kind of common natural geological disaster with great destructive power. It can cause debris flow and collapse of mountain body, which will cause great loss of people's life and property safety and national construction. Therefore, monitoring landslide is an effective way to reduce the hazard of landslide. With the development of Interferometric synthetic Aperture Radar (InSAR) technology, D-InSAR (differential Interferometry of synthetic Aperture Radar) as its extended application has the characteristics of wide coverage, high spatial resolution, all-weather, all-weather, large area, high sensitivity and so on. And the small deformation of the surface has the ability to detect the precision of centimeter level or even smaller size, which can obtain the high precision and high resolution information of the ground elevation, and compare the two interference images before and after the landslide disaster. Therefore, D-InSAR technique is used to extract deformation information of small landslide. In this paper, the development of differential synthetic aperture radar (SAR) interferometry in landslide information extraction, the principle of SAR imaging and the basic principle of INSAR are systematically described. Based on this, the main processing flow of D-INSAR technology is deeply studied. The main algorithms are discussed and analyzed in depth, and programming software is used to realize the functions of the main algorithms. The main contents of this paper are as follows: the two principal and auxiliary images after registration are used to form interference fringes, the interference fringes are processed by leveling effect removal, phase noise filtering, phase unwrapping, height conversion and deformation extraction. According to the SAR data provided by RADARSAT-2, the main algorithms of D-INSAR technology are processed and verified. Among them, the deflattened earth effect method based on orbit parameters can directly fit the satellite orbit equation, avoid the complex operation of multiple iterations, and improve the operation efficiency. The number of residual handicap, SNR and fringe edge integrity of several filtering methods are analyzed, and the conclusion that adaptive median filtering method has better filtering effect is obtained. The method of branch cutting in path tracking is used to unwrap the phase, and the advantage of the algorithm is that the running time is short. Finally, the SAR image with landslide information is processed with D-INSAR to extract the ground deformation information of the landslide. The results show that the D-INSAR technique can extract the small deformation information of the small landslide in centimeter level.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：P642.22;P225

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