摘要
该文基于浅海海流动力模型、波流交互模型、后向散射模型以及Doppler谱模型对顺轨干涉SAR浅海地形成像进行了建模。利用建立的成像模型,在准1维近似的条件下对不同雷达频率、入射角、顺轨基线长度以及极化方式等参数对顺轨干涉SAR浅海地形成像的影响进行了探讨。在成像延时低于海面去相关时间的前提下,高频率、大入射角以及长顺轨基线条件比较适合于顺轨干涉SAR浅海地形成像;而极化方式对顺轨干涉相位变化的影响不大,如果综合考虑信噪比等因素的影响,VV极化仍是顺轨干涉SAR浅海地形成像的首选极化方式。
In this paper,a simulation model of shallow sea topography imaging by Along-Track Interferometric SAR（ATI-SAR） is developed based on shallow sea current dynamical model,wave-current interaction model,backscattering model and Doppler spectrum model.This simulation model is used to study the influence of radar parameters（frequency,incidence angle,baseline length and polarization） on shallow sea topography imaging by ATI-SAR under quasi-one-dimension condition.The simulation results indicate that high frequency,large incidence angle and long along-track baseline are favorable to shallow sea topography imaging by ATI-SAR when the imaging time lag between two antennas is shorter than the de-correlation time of the sea.Considering the influence of Signal-to-Noise Ratio（SNR）,VV is a favorable polarization for shallow sea topography imaging,though the ATI phase may be not sensitive to the polarization.
出处
《电子与信息学报》
EI
CSCD
北大核心
2010年第10期2377-2382,共6页
Journal of Electronics & Information Technology
基金
微波成像技术国家重点实验室基金(9140C1901030702)资助课题
关键词
顺轨干涉SAR
浅海地形
雷达参数
ATI （Along-Track Interferometric）-SAR
Shallow sea topography
Radar parameters
