| 干涉SAR最小二乘二维相位展开法的改进 |
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| 引用本文： | 穆冬,朱兆达,张焕春.干涉SAR最小二乘二维相位展开法的改进[J].现代雷达,2001,23(2):23-26. |
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| 作者姓名： | 穆冬 朱兆达 张焕春 |
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| 作者单位： | 南京航空航天大学 |
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| 基金项目： | 国家自然科学基金(6082002)资助。 |
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| 摘 要： | 二维相位展开是干涉SAR成像的关键步骤和难点，以SIR－C／X－SAR真实数据得出的相位条纹为对象，用Pritt的最小二乘法做了展开，发现并讲座了最小二乘的平滑作用对展开结果的不良影响，并用一种依据二阶差分的加权对最小二乘法进行改进，更好地实现了相位展开。
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| 关 键 词： | 相位展开 合成孔径雷达 数字高度地图 最小二乘 |
| 修稿时间： | 2000年7月19日 |
Improving of the
Least-squares Two-dimensional Phase Unwrapping for InSAR |
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| Mu Dong,ZHU Zhao-da,ZHANG Huan-chun.Improving of the
Least-squares Two-dimensional Phase Unwrapping for InSAR[J].Modern Radar,2001,23(2):23-26. |
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| Authors: | Mu Dong ZHU Zhao-da ZHANG Huan-chun |
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| Abstract: | 2-Dimensional phase unwrapping is a stubborn problem in the image formation of interferometric SAR. In this article, phase unwrapping of the fringe produced from the raw data of SIR-C/X-SAR was discussed. First, Pritt′s least-squares method was used. Then, weakness, caused by the smoothing effect, of his method was revealed. Furthermore, a new weighting process, based on the second-order differential of fringe, was proposed, which improved the least-squares method and ensured better result. Last, unwrapping results were shown. |
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| Keywords: | phase unwrapping interferometry synthetic aperture radar (SAR) digital elevation model |
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