CAJ | 학술논문

本文针对多基线极化干涉 SAR 数据，提出了面向多基线干涉 SAR 高程反演的全局最优相干方法。该方法将多景全极化干涉影像联合在一起，构建多基线极化相干矩阵，由多基线最优相干准则指导，求解全局条件下的最优干涉图。该方法可以有效降低多基线干涉中散射中心不一致对干涉相位影响，从而提高干涉相位的精度和可靠性，并提高最终获取 DEM 的精度。利用国产 X-SAR 系统和德国 E-SAR 系统获取的多基线全极化数据进行全局最优相干方法试验，利用多基线极化最优相干方法生成全局条件下的最优干涉图，依据多基线高程反演方法计算目标高程，验证了本文提出的方法的有效性。
본문침대다기선겁화간섭 SAR 수거，제출료면향다기선간섭 SAR 고정반연적전국최우상간방법。해방법장다경전겁화간섭영상연합재일기，구건다기선겁화상간구진，유다기선최우상간준칙지도，구해전국조건하적최우간섭도。해방법가이유효강저다기선간섭중산사중심불일치대간섭상위영향，종이제고간섭상위적정도화가고성，병제고최종획취 DEM 적정도。이용국산 X-SAR 계통화덕국 E-SAR 계통획취적다기선전겁화수거진행전국최우상간방법시험，이용다기선겁화최우상간방법생성전국조건하적최우간섭도，의거다기선고정반연방법계산목표고정，험증료본문제출적방법적유효성。
A global optimal coherence method for elevation inversion from multi-basel ine polarimetric InSAR data is proposed.The multi-basel ine polarimetric InSAR data used in experiments were obtained by Chinese X-SAR system and Germany’s E-SAR system.Through combining several ful l polarimetric InSAR images,the proposed method constructs the multi-basel ine polarimetric InSAR coherency matrix,and solves the optimal interferograms under global optimal coherence criterion.The optimal interferograms generated by global optimal coherence method were used to calculate the elevation of target with multi-basel ine InSAR elevation inversion method.The proposed method reduces the influence of different scattering centers effectively using multi-basel ine InSAR,which improves the accuracy and rel iabi l ity of the interferometric phase and eventual ly improves the accuracy of DEM.The results verify the val idity of the proposed method.