星对星合成孔径激光雷达成像

Imaging of satellite-to-satellite synthetic aperture lidar

随合成孔径激光雷达技术的发展,对人造卫星等空间远距离高速运动目标进行高精度成像成为可能。从合成孔径激光雷达的成像原理出发,理论分析了合成孔径激光雷达在星对星成像侦察中的成像距离、成像分辨率和成像速度等特性;研究了星对星合成孔径激光雷达成像侦察的特征;辨析了激光发射功率、脉冲重频、两星相对速度等参数对成像精度和成像距离的影响。初步设计了工作波段、天线尺寸、信号带宽、脉冲重频等星对星合成孔径激光雷达成像侦察系统的主要工作参数。研究表明,合成孔径激光雷达具有成像距离远、成像分辨率高和成像速度快等特点,能够满足星对星成像侦察高精度、实时、快速的要求。

With the development of synthetic aperture lidar （SAL） technology, high resolution imaging for long-distance high-speed moving space targets, especially for satellites, become possible. Based on the imaging principle of SAL, the range, resolution and imaging speed characteristics of SAL imaging in satelliteto-satellite imaging reconnaissance were theoretically analyzed as well as the characteristics of satellite-tosatellite SAL imaging reconnaissance. The factors that influence accuracy and range of imaging, such as laser power, pulse repetition frequency, relative velocity of two satellites, were suggested. The main working parameters of the SAL using in satellite-to-satellite reconnaissance, such as work band, antenna size, signal bandwidth, pulse repetition frequency, were tentatively designed. The result shows SAL imaging has the characteristics of long imaging range, high imaging resolution and rapid imaging speed, which meets the high precision, real-time and rapid demands of satellite-to-satellite reconnaissance.