Spectra of L-band ionospheric scintillation over Nanjing

• 来源期刊: 科学通报(英文版)
• 学科: 地球科学
• 年，卷（期）: 2012,（25）
• 页码范围: 3381-3386
• 页数: 6页
• 分类号: P352
• 语种: 中文

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.