海南三亚地区S4指数与C/N、ROTI的比较分析

本文通过利用海南三亚站（1834°N, 10962°E）GPS闪烁/TEC接收机2004年8月到2005年7月间观测数据，在对三亚地区闪烁初步统计分析的基础上，比较分析了观测数据中S₄（幅度闪烁指数）和C/N（载噪比），S₄和ROTI（TEC变化率标准差）的关系，同时对2004年11月7日的闪烁事件进行了具体的分析. 通过比较分析得出：（1）三亚地区全年的闪烁强度具有明显的半年变化，在春秋季出现全年闪烁强度的最大值；（2）S₄与C/N具有很好的负相关性；（3）ROTI可以作为由小尺度不规则结构引起闪烁出现的指示剂.

A comparison and analysis of the S4 index,C/N and ROTI over Sanya

Using the data received by GPS scintillation/TEC receiver at Sanya station in Ha inan province during August, 2004-July, 2005, we made some comparison and analyses of the S₄ (the amplitude scintillation index), C/N (Carrier to Noise) a nd ROTI (the standard deviation of the change rate of TEC). We also analyzed the scintillation on 7 November 2004 in detail. From the comparison and analysis, we concluded as follows: (1) the scintillation strength of one year has a semiyearly periods, the maximum scintillation strength of one year appears in spring and autumn; (2) the S₄ and C/N have a good negative correlation; (3) ROTI can be regarded as an indicator of the present of scintillation causing small-scale ionospheric irregularities.