电离层闪烁对GNSS接收机性能影响比较分析

Comparison of GNSS Receiver Performance under Ionospheric Scintillation

电离层闪烁是引起GNSS接收机性能降低甚至失锁的重要环境干扰因素。利用实测数据,比较分析了不同电离层闪烁活动强度下,不同GNSS系统(BD和GPS)接收机的定位性能。结果表明:电离层闪烁较弱时(S4<0.3),两种接收机均可以实现基本的定位功能;电离层闪烁较强(S4>0.7),且持续时间较长时,不同GNSS接收机将出现定位结果的抖动、跳变或失去定位能力;GNSS接收机应对电离层闪烁影响的能力与接收机设计相关。研究结果可作为抗闪烁接收机开发或闪烁影响分级的参考。

Ionospheric scintillation is a kind of environmental interference to GNSS re- ceiver, leading to degradation of position fixing performance or even loss of lock. A compari- son on different GNSS （BD and GPS） receivers＇ performance under various ionospheic scin- tillation conditions is made with field data. It shows that two receivers maintain their posi- tion fixing capability under weak scintillation with S4〈0.3. Strong scintillation with S4〉 0. 7 and lasting for a period of time will cause ＂jitters＂, occasional loss-of-lock or loss of ca- pability of positioning. The difference in resisting scintillation effects depends on receivers design. The results of research could be a reference for anti-scintillation receiver develop- ment or classification of scintillation effects.