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	基于连接点的机载双天线InSAR系统相位偏置估计算法
其他题名	A Phase Offset Estimation Method Based on Tie Points for Airborne Dual-Antenna InSAR System
	李银伟; 夏慧婷; 卢护林; 王海涛
来源期刊	上海航天
ISSN	1006-1630
出版年	2018
卷号	35 期号:6 页码:112-116
中文摘要	针对在茂密森林或沙漠地区部署地面控制点(GCP)对其进行测量非常困难的问题,提出了一种基于连接点的机载双天线InSAR系统相位偏置估计新算法。基于InSAR原理建立地面高程反演的几何表达式,并根据重叠区域里的连接点高程在两次干涉测高过程中不变的特性建立相位偏置间的线性关系,在用最小二乘法求解相位偏置时,通过对不同的连接点进行加权,使估计出的相位偏置更加准确。对X波段机载双天线InSAR系统获得的实际数据进行处理,结果表明:与传统的算法相比,该算法无需GCP,具有更低的成本和更高的效率,且产生的数字高程模型(DEM)具有相似的精度。
英文摘要	In certain regions of dense forest or desert,deploying man-made ground control points(GCPs)and/or surveying them will be very troublesome.This paper proposes a novel method based on tie points to estimate the absolute phase offset for airborne dual-antenna interferometric synthetic aperture radar(InSAR)system.Firstly, based on the principle of InSAR,the geometric expression of the height retrieval for ground points is established. Secondly,the linear relationship between phase offsets is established according to the invariant height of tie points in the overlapping area during two times of different interferometric data acquisition.Finally,different tie points are weighted when solving the phase offset equations by the least square method,making the estimation of the phase offset more accurate.The real data obtained by the X-band airborne dual-antenna InSAR system are processed.The results show that compared with traditional methods based on GCPs,this method not only has low cost and high efficiency without GCPs,but also obtains similar accurate DEM.
中文关键词	机载双天线 ; InSAR系统 ; 相位偏置估计 ; 地面控制点 ; 连接点 ; 最小二乘法
英文关键词	airborne dual-antenna InSAR system phase offset estimation ground control point tie points least square method
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:6392659
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238062
作者单位	上海无线电设备研究所, 上海 201109, 中国
推荐引用方式 GB/T 7714	李银伟,夏慧婷,卢护林,等. 基于连接点的机载双天线InSAR系统相位偏置估计算法[J],2018,35(6):112-116.
APA	李银伟,夏慧婷,卢护林,&王海涛.(2018).基于连接点的机载双天线InSAR系统相位偏置估计算法.上海航天,35(6),112-116.
MLA	李银伟,et al."基于连接点的机载双天线InSAR系统相位偏置估计算法".上海航天 35.6(2018):112-116.