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论文题目 |
利用原始回波数据和图像数据的SAS联合运动补偿方法研究 |
论文题目(英文) |
Research on the Combined SAS Motion Compensation Method Based on Raw Echo Data and Image Data |
作者 |
刘维 |
发表年度 |
2008 |
卷 |
4 |
期 |
29 |
页码 |
538-543 |
期刊名称 |
仪器仪表学报 |
摘要 |
由于对首向角的估计精度差,相位中心重叠运动补偿方法会产生较大的累计误差。为了解决此问题,提高运动补偿的精度。提出一种利用原始回波数据和巨像数据的合成孔径声纳联合运动於偿方法。此方法将大的合成孔径分解为小的子孔径,子孔径内部的运动误差利用基于原始回波数据的方法估计并补偿;子孔径之间存在的累积误差则由图像数据相关估计,并直接补偿到图像数据中以提高计算效率。对湖试试验数据的处理结果表明,此方法可以较好的消除累积误差,提高合径声纳成像质量。 |
摘要_英文 |
Because of inaccurate estimation of yaw,displaced phase center algorithm suffers from accumulating error,To overcome this problem,a synthetic aperture sonar motion compensation method based on raw echo data and image data is presented.By this method,long synthetic apertures ale divided into short sub-apertures.The micro-error in each sub-aperture is estimated and compensated by displaced phase center method.The accumulating errors between sub—apertures are estimated by image data and compensated directly on sub-aperture image data to reduce computing load.The method is applied on lake trial data Results show the method call successfully remove the accumulating error and produce a better SAS image. |
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