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中文摘要：
根据SAR干涉测量原理,以配准偏移量为观测值,采用非线性最小二乘迭代法对干涉对的基线进行估计,并以ENVISAT卫星在西藏地区获取的两景SAR数据为例,对此基线估计算法进行实验验证。结果表明,该算法能有效地估计基线,减小轨道不精确带来的误差,在一定程度上提高InSAR生成DEM的精度。
英文摘要：
In this paper,a new baseline estimation method based on the principle of SAR interferometry is proposed.It uses co-registration offsets and non-linear least square algorithm to estimate the interferometric baseline.We apply it to estimating the baseline of two ENVISAT SLC images covering Tibet,China.The results demonstrate that the algorithm can effectively estimate the baseline,reduce the errors due to the inaccurate orbits data and therefore improve the accuracy of DEM generated by InSAR.
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