Spectra of L-band ionospheric scintillation over Nanjing  

作　　者：FANG HanXian YANG ShengGao WANG SiCheng 

机构地区：[1]Institute of Meteorology,PLA University of Science and Technology,Nanjing 211101,China [2]State Key Laboratory of Space Weather,Chinese Academy of Seiences,Beijing 100190,China

出　　处：《Chinese Science Bulletin》2012年第25期3375-3380,共6页

基　　金：supported by the National Natural Science Foundation of China (40505005);the Specialized Research Fund for State Key Laboratories

摘　　要：We report the spatiotemporal statistical characteristics of amplitude scintillation over Nanjing.A FFT method for computing scintillation intensity power spectra is briefly described.Using this method,the data with ISATM in Nanjing is analyzed.Spectra characteristic is presented and the irregularities property is discussed preliminarily.The results reveal that the power spectra obtained for Nanjing is consistent with theoretical modeling.At frequencies below the Fresnel frequency,the power density plotted on log-log scale is almost constant whereas above it asymptotes to a straight line.The spectral index ranges from 1.71 to 1.92,which has positive correlation with the S 4 index.Finally,the average drift velocity of irregularities is computed assumably and compared with that obtained for Xinxiang and Haikou.We report the spatiotemporal statistical characteristics of amplitude scintillation over Nanjing. A FFT method for computing scintillation intensity power spectra is briefly described. Using this method, the data with ISATM in Nanjing is analyzed. Spectra characteristic is presented and the irregularities property is discussed preliminarily, The results reveal that the power spectra obtained for Nanjing is consistent with theoretical modeling. At frequencies below the Fresnel frequency, the power density plotted on log-log scale is almost constant whereas above it asymptotes to a straight line. The spectral index ranges from 1.71 to 1.92, which has positive correlation with the S4 index. Finally, the average drift velocity of irregularities is computed assumably and compared with that obtained for Xinxiang and Haikou.

关 键 词：电离层闪烁 光谱特性 南京 L-波段 违规行为 FFT方法 幅度闪烁 统计特征 

分 类 号：P352[天文地球—空间物理学]