基于GPS的广州地区电离层不规则体纬向漂移速度计算分析

Calculation Analysis of Ionospheric Irregularity Zonal Drift Velocity in Guangzhou Based on GPS Measurements

利用广州站组建的两台短间距GPS电离层闪烁监测仪的观测数据,分别对GPS卫星信号强度用功率谱和短间距台链互相关性两种方法计算了3次闪烁事件电离层不规则体的漂移速度.分析结果表明,同一不规则体会引起两台站闪烁事件的同时发生,两种方法测量不规则体漂移速度通常在50～160 m/s之间,平均大小均在120 m/s左右,且纬向漂移速度在闪烁初期起伏较明显,速度随闪烁时间有下降的趋势,夜间纬向漂移方向由西向东,广州地区漂移速度特性符合低纬其他地区不规则体漂移速度特征,两种计算方法合理有效.

Using data observed by two GPS ionospheric scintillation monitors located near each other at Guangzhou station, the amplitude scintillation was measured, and the zonal drift velocity of the ionospheric irregularities was studied by choosing three scintillation events, with methods of signal intensity power spectrum and cross-correlation technology. The resu]ts show that each of the scintillation registered in two receiver monitors occurs at the same time and induced by the same ionospheric irregularity. The zonal drift velocity is about 50m/s to 160 m/s, on average about 120 m/s from the two calculating methods, varies significantly at the beginning of the scintillation, decreased with time and eastward. The characteristics of the zonal drift velocity in Guangzhou are consistent with the observation at other stations in the low latitude region, which indicate that the two calculating methods are feasible and effective.