磁暴对GPS硬件延迟影响的研究

根据不同纬度的4个GPS台站的数据,采用6系数二次曲面模型对磁暴期间GPS系统的硬件延迟的波动进行了研究,结果表明:在纬度较低的地区,由于电离层中的电子浓度较大并且存在较大的经向梯度变化,磁暴期间计算出的硬件延迟存在着较大的波动.因此,对GPS系统硬件延迟的估算应尽量选择中高纬地区台站的数据并且避免使用磁暴发生期间的数据.

Study of Influence of Magnetic Storm on the GPS Hardware Delay

Though the data of four GPS stations, the paper studies fluctuation of GPS hardware delay by six coefficients conicoid at magnetic storm time, results indicate that the hardware delay, which obtains by data of GPS station, shows bigger fluctuation at magnetic storm time because of larger electronic concentration and its longitudinal grads variety in lower latitude area in ionosphere. So in the calculation of GPS hardware delay, it would be good to use data of GPS station in the area of mid-high latitude and at the period of non-magnetic storm.