陆探四号01星微波通道在轨自主相位补偿方法  

On-orbit autonomously phase compensation method for microwave channels of LT-4(01)

作　　者：林晨晨[1] 李光廷[1] 孙娟[1] 路小军 刘鑫[1] 陈一波 LIN Chenchen;LI Guangting;SUN Juan;LU Xiaojun;LIU Xin;CHEN Yibo(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17-22,共6页Space Electronic Technology

基　　金：国家自然科学基金项目(编号:62107033)。

摘　　要：地球同步轨道星载合成孔径雷达系统单次成像任务时间长达千秒级且具有较高热耗。成像过程中,多通道射频链路上多种设备均会发生插入相移随温度漂移现象,导致方位向相位相关性变差进而影响系统的成像性能。为了解决该问题,文章中提出了一种在轨自主实时温度相位补偿方法。该方法将上百台设备/电缆的温度相位数据进行优化存储,在成像时实时读取温度后查表计算链路相位变化并进行补偿,具有灵活适应多种模式、存储及逻辑轻量、可靠稳定等特点。仿真和测试验证了该方法可有效提升系统长时间工作工况下成像性能,已成功实现在轨应用。One single imaging mission of the geosynchronous orbit space borne synthetic aperture radar takes up to one thousand seconds and the heat consumption is extremely high.During the imaging process,the insertion phase of various devices of multi-channel will drift with temperature,causing the phase correlation in azimuth deteriorate and thus affecting the imaging performance of the system.To solve this problem,an on-orbit autonomous real-time temperature phase compensation strategy is represented in this paper.The temperature phase data for hundreds of devices is optimized and stored in advance,during one imaging mission,the temperature at each device will be read and used to look up and calculate the phase deviation in real time,and finally implements phase compensation through the phase shifters.This method has characteristics of flexible adaptability to multiple modes,reliability and stability in space environment,lightweight in aspect of storage and logic.Simulation and testing have verified that this method can effectively improve the imaging performance of the system with long-synthetic aperture time,and has been successfully implemented in orbits.

关 键 词：地球同步轨道 合成孔径雷达 相位补偿 

分 类 号：V443[航空宇航科学与技术—飞行器设计]