利用地基观测对卫星观测电离层结构参数的定量验证研究

Quantitative verification on satellite observational data of ionospheric structure parameters using ground-based data

本文采用散点图、趋势线、相关系数及观测偏差等统计方法,利用COSMIC卫星和SPIDR提供的垂测仪观测的F_2层峰值电子密度数据,开展了综合统计及按季节、地方时和纬度的分类统计.统计结果显示:地基垂测仪与卫星观测到的相应的F_2层峰值电子密度数据具有很高的相关性,两者之间的相关系数高达0.95,相对偏差的平均值为-3.38%,标准差为19.54%.基于上述研究结果,提出了利用地面垂测仪观测数据验证卫星观测的电离层结构参数的方法,并给出了定性的判别依据和定量的判别标准,可在我国电磁监测试验卫星发射后,为F_2层峰值电子密度观测数据的真实性和有效性提供检验方法和保障.

Based on the previous research results,we used some statistical methods such as scatter plot,trend line,correlation coefficient and deviation to process the peak electron density（NmF2）data received by COSMIC satellite and SPIDR ground ionosonde.Both total data statistics and classified data statistics by season,local time and latitude are employed in order to carry out the research on quantitative verification on ionospheric structure parameters.The results show that the NmF2 of COSMIC satellite is consistent with the measured value of ionosonde with correlation coefficient 0.95 and average relative difference-3.38%,along with the standard deviation 19.54%.Based on the study,the verification method of NmF2 observed by satellite is given,and the qualitative and quantitative criteria are also provided,which will ensure the quality of NmF2 observed by China Seismo-Electromagnetic Satellite（CSES）.