摘要
针对地表信息探测及监控的地面遥感应用场合,利用同步轨道卫星对地观测重复周期短、可实时监控的特点,从概念、原理上对同步轨道合成孔径雷达进行了说明,对其参数设计方法进行了研究。在条带成像模式下对卫星相对运行轨迹和波束覆盖范围进行了重点研究,理论上分析和计算了卫星轨道及姿态对雷达成像斜视角及多普勒中心的影响。基于对中国地区地理的监测,设计了一组有效的雷达参数,对此进行了理论仿真,对GEOSAR成像中的距离多普勒成像算法和后向投影算法分别进行了对比和说明。通过数据仿真结果验证了本系统的有效性和可行性。
The concept and theory of geosynchronous synthetic aperture radar（GEOSAR） are introduced,and the parameter design of GEOSAR is focused on,using the characteristics of short period and real-time processing in the application of ground information remote sensing.Much effort is given to analyse the track of satellites relative to the earth and the area of irradiation in strip-mode.The influence of orbit and attitude of the satellite on the squint angle and Doppler center is analyzed and computed theoretically.Based on the position of China,a group of effective parameters of radars are designed.In the GEOSAR imaging processing,the range-Doppler algorithm and the back-projection algorithm are respectively compared by using simulated data.Simulation results verify the feasibility and superiority of the approach.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2010年第5期931-936,共6页
Systems Engineering and Electronics
基金
教育部博士学科点专项科研基金(200807010002)
武器装备预研基金(9140C0102100902)资助课题
关键词
合成孔径雷达
同步轨道
距离多普勒
后向投影
synthetic aperture radar（SAR）
geosynchronous
range-Doppler
back-projection
