中低纬度地区连续运行参考站网络电离层扰动修正技术研究

Ionospheric disturbance delay correction method for reference station network over mid &low latitude region

分析了电离层扰动对中长距离连续运行参考站网络(CORS)的工作性能的影响,论证了中小尺度电离层行进式扰动是影响中低纬度地区CORS基线解算和实时定位精度的最主要误差源。本文提出了时相关电离层修正模型,通过在双线性曲面纠正模型上附加中尺度电离层扰动修正信息,实现电离层预报修正技术。在100 km以上长距离参考站网的实验验证了该技术应用于CORS领域减弱电离层强扰动影响方面的有效性。

The influence of ionospheric disturbance on the medium and long range Continuously Operating Reference Stations （CORS） is analyzed. The medium ＆ small scale Traveling Ionospheric Disturbances （TIDs） are one of the main error sources influencing the baseline resolution and real-time positioning for CORS over mid ＆ low latitude region. A temporal correlation based ionospheric prediction technique is proposed and the MSTIDs are applied in the bilinear surface model. Field test on long range CORS over 100 km showed that the ionospheric disturbances over CORS could be effectively reduced when the new method was applied.