本文關(guān)鍵詞：多源數(shù)據(jù)聯(lián)合處理在地表形變監(jiān)測中的應用研究　出處：《中國地質(zhì)大學(北京)》2017年碩士論文　論文類型：學位論文

  更多相關(guān)文章： GPS 精密水準測量 合成孔徑雷達干涉測量 三維形變場

【摘要】：高精度的地表形變是地震孕震機理研究的必要信息,GPS和精密水準作為優(yōu)秀的空間大地測量手段,分別在水平和豎直方向的地表形變探測上有著良好的應用效果。但GPS和精密水準觀測因為建設和觀測成本高使得其布設密度有限,空間分布上較為離散,尤其在山區(qū)等困難地區(qū),其布設密度無法保證,而且觀測難度也會激增。合成孔徑雷達干涉測量技術(shù)的誕生和發(fā)展,尤其是DInSAR和PS-InSAR技術(shù)方法的應用,使大空間尺度、高空間分辨率的地表形變信息探測成為可能,但其獲得的形變結(jié)果是各個方向形變量在雷達視線方向(LOS方向)的投影,無法真實反映地表形變信息。GPS、精密水準、InSAR三種技術(shù)所獲資料進行聯(lián)合處理可以彌補單一手段的弊端,得到更為可靠的地表三維形變場信息。本文以我國重點強震區(qū)(構(gòu)造區(qū))西南天山地區(qū)為實驗區(qū),收集整理了該區(qū)域內(nèi)同期或相近期的GPS、精密水準、PS-InSAR三種觀測資料,分別進行解算處理獲得研究區(qū)的形變速率結(jié)果,其中精密水準動態(tài)平差過程利用GPS連續(xù)站垂直方向速率進行了約束,以減弱基準選定和長距離觀測誤差積累帶來的影響。而后,利用GPS解算的水平速率和水準獲取的垂向速率,對InSAR視線向形變速率進行修正和聯(lián)合約束處理,最終獲得了地表高空間分辨率的三維形變速度場。實驗結(jié)果表明西南天山地區(qū)水平方向形變呈西北向,形變速率幅度約為-2~3mm/yr;垂直形變呈現(xiàn)山體褶皺隆升,谷地下降趨勢,形變速率幅度約為-3~2mm/yr。此結(jié)果與多位學者的已有研究結(jié)果一致。文中還以GPS、精密水準結(jié)果為參考對實驗結(jié)果進行了精度分析,證明了本文應用的GPS/精密水準/InSAR觀測資料聯(lián)合處理方法的可行性和可靠性。最終獲取的形變分布特征與區(qū)域內(nèi)地質(zhì)構(gòu)造的空間分布有著一定的聯(lián)系,對該地區(qū)長時間以來的地質(zhì)構(gòu)造、板塊運動趨勢及應力推斷有一定的論證作用。
[Abstract]:The surface deformation in high precision is necessary to study the seismogenic mechanism of information, GPS and precise leveling as space geodetic means excellent, respectively. Surface deformation detection in horizontal and vertical direction has a good effect. But GPS and precise leveling for construction and observation of high cost makes its layout density, spatial distribution more discrete, especially in mountainous areas and other difficult areas, the layout density cannot be guaranteed, and the observation difficulty will surge. The birth and development of synthetic aperture radar interferometry, especially the application of DInSAR and PS-InSAR techniques, the large spatial scale, high spatial resolution of surface deformation information detection is possible, but the deformation the result is all directions form variable in radar gaze direction (LOS direction) of the projection, not a true reflection of the surface deformation information of.GPS, InSAR three kinds of precision water. The information processing technology can make up for a single means of abuse, to obtain more reliable information of 3D surface deformation field. This paper focus on strong earthquake zone in China (construction area) in Southwest Tianshan area for experimentation area, collected in the region over the same period or recent GPS, precise leveling, PS-InSAR three kinds of observation data. Respectively calculate processing to obtain the deformation rate of the study area, the precision level dynamic adjustment process using continuous GPS vertical rate were bound to weaken the influence of base selection and long distance observation error accumulation. Then, the level of rate and level are solved by GPS to obtain the vertical rate of the InSAR line of sight to the rate of deformation correction and joint constraint processing, finally obtained the 3D surface deformation velocity field with high spatial resolution. The experimental results show that the horizontal deformation in Southwest Tianshan area In the north-west, the strain rate range is about -2~3mm/yr; the vertical deformation shows mountain fold uplift, valley downward trend, the strain rate range is about -3~2mm/yr. with the result of a number of scholars have research results. This paper uses GPS, precision level results for the reference of the precision analysis of the experimental results, proved the feasibility and reliability of combined processing method of GPS/ precision level /InSAR data used in this paper. The spatial distribution characteristics of geological structure and regional deformation distribution eventually obtained in a certain relation, the geological structure in the area since a long time, the plate movement trend and stress have demonstrated inference function.

【學位授予單位】：中國地質(zhì)大學(北京)
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P315.7
，

本文編號：1405043