电离层闪烁模型中的不均匀体强度建模

Irregularity strength modeling in ionospheric scintillation model

不均匀体强度模型是电离层闪烁建模的重要组成部分.参考国外电离层闪烁建模的思路,利用海口地区2003年至2008年的GPS闪烁观测数据建立了中国低纬地区电离层闪烁不均匀体强度模型,并对模型精度进行了分析.利用2003年至2008年海口地区GPS闪烁数据进行的模型精度分析表明,模型误差为无偏正态分布,误差方差为0.44.利用2013年海口地区和广州地区GPS闪烁数据进行的模型精度分析表明,模型误差基本保持无偏的正态分布特征,误差方差为0.42.利用国外模型进行同样的精度分析,其误差均值为0.33,方差为0.99,且为有偏分布.由此表明,建立的闪烁强度模型在中国低纬地区具有良好的适用性.

Disturbance strength modeling of scintillation-producing irregularity is one of the main tasks in ionospheric scintillation models.A strength model for ionospheic irregularity is constructed with GPS scintillation data from Haikou China with relating foreign models as reference.The validity of the model is also checked with extensive data.The residual of model shows unbiased distribution with mean of zero and standard deviation 0.44 for the test data of Haikou from 2003 to 2008.More test with data from Haikou and Guangzhou in 2013 also show an unbiased distribution almost with standard deviation of 0.42.On the contrary,a biased result is obtained for the models constructed in the references with a mean of0.33 and standard deviation 0.99 when the same Haikou data set is used.The test results show the validity of the scintillation irregularity model established in the work.