摘要
定位精度是合成孔径雷达(SAR)系统的一项重要指标。文中首先从星载SAR图像的4定位原理出发,提出了距离-多普勒定位法的定位条件,并通过直接法得出了定位模型;然后对星载SAR的定位误差进行了详细分析和仿真计算,并对仿真结果进行了归纳总结。仿真结果表明,影响定位精度的主要因素是斜距测量误差、目标高度误差、平台星历(位置和速度)误差。而多普勒频率测量误差对定位精度影响则可忽略不计。
Location precision is an important criterion of synthetic aperture radar（SAR） system. First, this paper brings forward location condition and model on the basis of image location priciple. Second, analy- sis and computation of SAR location error are carried out and simulation results are concluded. The results indicate that the distance measurement error, terrain variation error, and the satellitic situation and speed er- ror are the main factors influencing the location precision, but the influence caused by Doppler frequency measurement error can be ignored.
出处
《雷达科学与技术》
2009年第2期102-106,共5页
Radar Science and Technology
关键词
合成孔径雷达
定位模型
仿真
定位精度
synthetic aperture radar（SAR）
location error
simulation
location precision
