GEO轨道空间目标逆合成孔径激光雷达成像理论和方法

项目名称： GEO轨道空间目标逆合成孔径激光雷达成像理论和方法

项目编号： No.61771449

项目类型： 面上项目

立项/批准年度： 2018

项目学科： 无线电电子学、电信技术

项目作者： 李道京

作者单位： 中国科学院电子学研究所

项目金额： 16万元

中文摘要： 激光雷达波束窄能量集中的特点，使其特别适于地基对特定区域地球同步轨道（GEO）空间目标实施远距离探测。使用合成孔径技术，激光雷达可在较小的光学孔径条件下，以较高的数据率，对远距离GEO轨道空间目标实现高分辨率成像。激光信号相干性的提高，已使逆合成孔径激光雷达（ISAL）的技术实现成为可能，针对地基ISAL GEO轨道空间目标观测问题，研究逆合成孔径激光雷达对远距离空间目标成像探测理论和方法，对我国空间目标观测系统的发展具有重要意义。本项目拟系统研究GEO轨道空间目标ISAL成像模型与理论、信号处理方法、系统方案等内容，通过相应的计算机仿真试验验证项目理论和方法的有效性。拟解决的关键科学问题为大气相位误差校正和激光信号相干性保持方法、10s量级激光信号空间目标高精度运动补偿和高分辨率成像方法。.本项目的研究工作将为我国空间目标观测激光雷达的研制提供理论和技术支持。

中文关键词： 激光雷达；合成孔径成像；空间目标；GEO轨道

英文摘要： The concentrating laser beam makes ladar an efficient way to apply long-distance detection for GEO object in particular area. By using synthetic aperture technique, ladar has the ability to achieve high-resolution imaging for long-distance GEO object with high data rate and relative small optic aperture.The improvement of laser signal’s coherency has made it possible for the technical realization of inverse synthetic aperture ladar(ISAL). Aiming at the GEO object observation problem with ground-based ISAL, the research on theory and method of ISAL for long-distance object has great significance in Chinese development of space object observation system.This program is planed to implement systematic research on ISAL imaging for GEO object, including model and theory, signal processing method and system scheme. The computer simulations experiments will be carried out to verify validity of the proposed theory and method. We also focus on some key technical problems, involving atmosphere phase error correction, coherence maintainability of ladar signal, high-precision moving error compensation theory as well as high-resolution method for space object within 10 seconds..In consequence, the research in this program will support the development of Chinese space object observation ladar both in theory and technical realization.

英文关键词： Ladar;Synthetic Aperturer Imaging;Space Object;GEO