Chernyshov A A, Miloch W J, Jin Y, Zakharov V I
Space Research Institute of the Russian Academy of Science, Moscow, Russia.
West Department of Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, RAS, Kaliningrad, Russia.
Sci Rep. 2020 Apr 14;10(1):6363. doi: 10.1038/s41598-020-63422-9.
The influence of an auroral substorm on the total electron content (TEC) jumps and cycle slips on Global Positioning System (GPS) at high-latitudes is studied. For the first time, optical data from the all-sky imager, as well as interplanetary magnetic field and magnetometer data are used to complete the analysis of the slips occurrence and to monitor the substorm evolution. Two types of slips are considered: (i) instrumental slips including losses in the measured phase of the GPS signal and (ii) sharp TEC variations (TEC jumps) It is demonstrated that the jumps in TEC determined from the GPS signals are mainly related to the auroral particle precipitation that normally occurs during geomagnetic substorms in the polar ionosphere. The GPS frequency [Formula: see text] is consistently subject to more slips than frequency [Formula: see text] both for quiet and disturbed conditions. The probability of TEC jumps is higher than for cycle slips in phase at frequencies [Formula: see text] and [Formula: see text]. The maximum of TEC jumps is observed during the recovery phase of the auroral substorm. Our findings are based on a data set obtained for a particular event. A generalization of the obtained numerical estimates to other events requires additional research and further analysis.
研究了极光亚暴对高纬度地区全球定位系统（GPS）总电子含量（TEC）跃变和周跳的影响。首次使用全天空成像仪的光学数据以及行星际磁场和磁力计数据来完成对周跳发生情况的分析，并监测亚暴的演变。考虑了两种类型的周跳：（i）仪器周跳，包括GPS信号测量相位中的损失；（ii）TEC的急剧变化（TEC跃变）。结果表明，由GPS信号确定的TEC跃变主要与极区电离层地磁亚暴期间通常发生的极光粒子沉降有关。无论是在平静还是扰动条件下，GPS频率[公式：见正文]始终比频率[公式：见正文]更容易发生周跳。在频率[公式：见正文]和[公式：见正文]处，TEC跃变的概率高于相位周跳的概率。TEC跃变的最大值出现在极光亚暴的恢复阶段。我们的研究结果基于一个特定事件获得的数据集。将所得数值估计推广到其他事件需要进一步的研究和分析。
