基于峰值旁瓣比估计电离层TEC的方法

针对地球同步轨道合成孔径雷达（geosynchronous synthetic aperture radar ，GEOSAR）电离层扰动相位定标试验研究，提出了一种基于脉冲压缩指标峰值旁瓣比来估计电离层积分电子总含量（total electron content ，TEC）的方法。首先，分析了电离层对GEOSAR相位定标信号相位误差的影响特点；然后，计算了脉冲压缩指标峰值旁瓣比（peak sidelobe ratio ，PSLR）后迭代法估计电离层引起的二次相位误差，进而反演电离层的T EC ；最后，通过仿真分析该方法的可行性和适用性。该方法适用于GEOSAR相位定标试验中估计电离层TEC ，在低波段（如P波段）信号中效果最优。

Method of measuring ionospheric TEC based on PSLR

Aiming at geosynchronous synthetic aperture radar (GEOSAR), there is an experimental study on phase calibration caused by ionospheric disturbances, this paper proposes a method of measuring ionospheric total electron content(TEC) based on peak sidelobe ratio. Firstly, analyze the ionospheric affect on GEOSAR experimental signal, after signal range compression, calculate the peak sidelobe ratio. Then, estimate quadratic phase error caused by the ionosphere and inverse the ionosphere TEC. Finally, the simulation analysis prove the feasibility and applicability of this method. The conclusion is that this method is suitable for the GEOSAR experimental study on phase calibration caused by ionospheric disturbances, and the estimated TEC in the low band (such as P band) is closer to true value.