本文選題：合成孔徑雷達(dá)干涉測(cè)量(InSAR) + 基線估計(jì)��； 參考：《華中科技大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年03期

【摘要】：為了提高無地面控制點(diǎn)信息和精密軌道數(shù)據(jù)時(shí)合成孔徑雷達(dá)干涉測(cè)量(InSAR)基線估計(jì)的精確性和實(shí)用性,借鑒零中頻矢量濾波的思想,提出了數(shù)字高程模型(DEM)輔助的InSAR零中頻處理基線估計(jì)方法.該方法利用衛(wèi)星軌道法估計(jì)基線參數(shù)初值,并根據(jù)該基線參數(shù)值,由低精度DEM模擬覆蓋區(qū)的干涉圖,將模擬干涉圖與原始干涉圖做差分處理得到差分干涉圖.以零中頻為判別依據(jù),對(duì)差分干涉圖進(jìn)行快速傅里葉變換(FFT)基線估計(jì),獲取基線參數(shù)初值的改正量,并修正基線參數(shù)初值,通過迭代直至差分干涉圖的二維中心頻率接近于0.利用甘肅蘭州地區(qū)和伊朗BAM地區(qū)ENVISAT ASAR數(shù)據(jù)進(jìn)行了驗(yàn)證,實(shí)驗(yàn)結(jié)果表明:利用該方法能有效進(jìn)行基線估計(jì),可得到與精密軌道基線估計(jì)方法相近的結(jié)果,具有不依賴于精密軌道參數(shù)和地面控制點(diǎn)的優(yōu)勢(shì).
[Abstract]:In order to improve the accuracy and practicability of the baseline estimation of synthetic Aperture Radar (SAR) interferometry without ground control point information and precise orbit data, the idea of zero-intermediate frequency vector filtering is used for reference. A digital elevation model (DM) aided baseline estimation method for InSAR zero if processing is proposed. In this method, the initial value of baseline parameters is estimated by satellite orbit method. According to the baseline parameter value, the differential interferogram is obtained by differential processing between the simulated interferogram and the original interferogram by using low-precision DEM to simulate the interferogram in the overlay area. On the basis of zero if, the difference interferogram is estimated by fast Fourier transform (FFT) baseline. The correction of the initial value of the baseline parameter is obtained, and the initial value of the baseline parameter is corrected. The 2-D center frequency of the differential interferogram is close to 0 by iteration. The ENVISAT ASAR data of Lanzhou area and BAM area of Iran are used to verify the results. The experimental results show that the method can be used to estimate the baseline effectively and the results are similar to those of the precision orbit baseline estimation method. It has the advantage of independent of precision orbit parameters and ground control points.
【作者單位】： 信息工程大學(xué)地理空間信息學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(41071296;41474010;61401509) 國(guó)家高技術(shù)研究發(fā)展計(jì)劃資助項(xiàng)目(2011AA120402;GFZX0404040803)
【分類號(hào)】：P237

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本文編號(hào)：1986107