星载综合孔径微波辐射计冗余空间定标方法研究  

Research on spaceborne synthetic aperture interferometric radiometer based on redundant space calibration

作　　者：李鑫 李浩[1] LI Xin;LI Hao(China Academy of Space Technology(Xi’an),Xi’an 710000,China)

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2024年第2期42-46,共5页Space Electronic Technology

基　　金：民用航天预先研究项目(编号:D040202)。

摘　　要：星载综合孔径微波辐射计系统为了实现更好的辐射测量性能,在地面对通道间剩余相位通过相位定标实验进行测量,其结果用于亮温重构时对通道间剩余相位进行补偿。冗余空间定标方法基于自身阵列冗余基线信息,该方法无需额外资源支持即可对星载综合孔径微波辐射计系统定标,可作为一种在轨的验证方案对系统综合孔径微波辐射计系统通道间剩余相位进行评估。系统性的介绍了基于星载综合孔径微波辐射计系统观测到的场景,冗余空间定标方法以及对平坦场景提出利用模拟的平坦目标响应相位修正的方法,可在点源场景、平坦场景下利用冗余空间定标方法求解通道间剩余相位,并结合仿真验证该方法的可行性。In order to obtain the better radiometric performance,spaceborne synthetic aperture interferometric radiometer measures the inter-elements phase based on phase calibration test on-ground,the result can be used to compensate the inter-element phase in the brightness temperature inversion.redundant space calibration takes advantage of the redundant baseline information of interferometric array,this technology assesses inter-elements phase without extra resource and take for an on-orbit verification scheme.This paper systematically introduces the manner of redundant space calibration based on scene observed by spaceborne synthetic aperture interferometric radiometer and proposes a correction method with a phase of simulated flat target response for flat target scene,this method can retravel inter-elements phase in point source scene and flat target scene,combined with simulation to verify feasibilities.

关 键 词：星载综合孔径微波辐射计 冗余空间定标 相位定标 

分 类 号：V443[航空宇航科学与技术—飞行器设计]