论文部分内容阅读
采用FDTD方法计算和分析了现有的两类典型的卫星——三轴稳定和自旋稳定卫星的宽带散射特性,比较了这两种典型卫星目标的时域和频域散射特性随姿态变化的规律。结果显示频域散射特性适合在大姿态角变化范围内分析卫星目标姿态,而时域散射特性适合在小姿态角变化情况下分析卫星目标姿态。此外,对于典型卫星目标而言,翻滚姿态变化比俯仰姿态变化可以引起更大的目标后向散射变化。计算分析结果对卫星目标及其姿态的识别,以及对宽带地基雷达的设计有一定的参考价值。
The FDTD method is used to calculate and analyze the broadband scattering characteristics of the two typical satellites - triaxial and spin-stable satellites. The scattering characteristics of the two typical satellites in time and frequency domains are compared with the changes in attitude law. The results show that the scattering characteristics in the frequency domain are suitable for analyzing the satellite target attitude in the range of large attitude angles, while the time-domain scattering characteristics are suitable for analyzing the satellite target attitude in the case of small attitude angle changes. In addition, for typical satellite targets, roll attitude changes may cause greater target backscatter variations than pitch attitude changes. Computation and analysis of the results of satellite targets and their attitude recognition, as well as the design of broadband ground based radar has some reference value.