Temporal and spatial changes of GPS total electron content (TEC) and phase variation, called phase scintillation, during auroral substorms and breakups are investigated in the context of horizontal equivalent ionospheric currents and estimated vertical current amplitudes derived from ground magnetometer network using the spherical elementary current method. GPS phase scintillation is computed for sampling rate of 50 Hz by specialized GPS scintillation receivers from the Canadian High Arctic Ionospheric Network (CHAIN). A proxy phase scintillation index is obtained from dual frequency measurements of geodetic-quality GPS receivers sampling at 1 Hz, which include globally distributed receivers of RT-IGS network that are monitored by the Canadian Geodetic Survey in near-real-time. Based on analysis of four cases, it is shown that GPS phase scintillation maps to regions of strong westward electrojet and to the poleward edge of the eastward electrojet. For substorm onsets, auroral breakups and substorm intensifications, the ionospheric pierce points with moderate to strong phase scintillation associated with TEC enhancements map to regions of intense westward electrojet interfacing with the eastward electrojet near the boundaries between downward Region 1 and upward Region 1/Region 2 currents in the Harang discontinuity region, where intense auroral emission was observed for some of the cases studied. Energetic particle precipitation in this dynamic region results in steep electron density gradients and drifting irregularities that are the cause of GPS phase variation.

在水平等效电离层电流的背景下研究了 GPS 总电子含量 (TEC) 和相位变化（称为相位闪烁）的时间和空间变化，在水平等效电离层电流的背景下，使用球形基本电流从地面磁力计网络推导出来的估计垂直电流幅度方法。GPS 相位闪烁是通过来自加拿大高北极电离层网络 (CHAIN) 的专用 GPS 闪烁接收器计算 50 Hz 的采样率。从以 1 Hz 采样的大地质量 GPS 接收器的双频测量获得代理相位闪烁指数，其中包括由加拿大大地测量局近实时监测的 RT-IGS 网络的全球分布式接收器。通过对四个案例的分析，结果表明，GPS 相位闪烁映射到强西电喷流区域和东电喷流的极地边缘。对于亚暴爆发、极光破裂和亚暴加强，与 TEC 增强相关的中到强相位闪烁的电离层穿透点映射到强烈的西向电喷流区域与向下区域 1 和向上区域 1/区域 2 之间边界附近的东向电喷流Harang 不连续区域的电流，在那里观察到了一些研究案例的强烈极光发射。这个动态区域中的高能粒子沉淀导致陡峭的电子密度梯度和漂移的不规则性，这是 GPS 相位变化的原因。