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首页> 外文会议>Saint Petersburg International Conference on Integrated Navigation Systems; 20030526-28; St.Petersburg(RU) >IONOSPHERE EFFECTS ON POSITION DETERMINATION BASED ON GLONASS AND GPS MEASUREMENTS
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IONOSPHERE EFFECTS ON POSITION DETERMINATION BASED ON GLONASS AND GPS MEASUREMENTS

机译：基于GLONASS和GPS测量的离子球对位置确定的影响

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摘要

One of the main drawbacks of GLONASS and GPS accuracy for L1 users is the ionospheric refraction, which affects, mainly, the point positioning and time transfer. The error due to the ionospheric refraction depends on the Total Electrons Content present in the ionosphere. Results of investigations of ionosphere influence on GLONASS and GPS point positioning are presented. This investigation is based on the single-layer model of the ionosphere. The ionosphere correction does not reduce the height error at all, substantial systematic error in height is present. Ionosphere delay shifts height and receiver time on constant value that only depends on vertical delay. It is possible to calculate height and time shifts using by only obtained coefficients and vertical delay without calculation of position. These coefficients were estimated through the analytical adjustment. After investigation the ionospheric effects on point positioning, we concluded that the sum of satellite clock error, orbit error, troposphere error, multipath error and geometric effects (dilution of precision) give major position error than ionosphere. Computer simulation and experiments showed reliability obtained assumptions. The results presented here suggest that all of these assumptions are feasible.
机译：对于L1用户而言，GLONASS和GPS准确性的主要缺点之一是电离层折射，这主要影响点的定位和时间传递。电离层折射引起的误差取决于电离层中存在的总电子含量。给出了电离层对GLONASS和GPS点定位的影响的调查结果。该研究基于电离层的单层模型。电离层校正根本不会减少高度误差，存在高度的系统误差。电离层延迟将高度和接收器时间转换为仅取决于垂直延迟的恒定值。可以仅使用获得的系数和垂直延迟来计算高度和时移，而无需计算位置。这些系数是通过分析调整估算的。通过研究电离层对点定位的影响，我们得出结论，卫星时钟误差，轨道误差，对流层误差，多径误差和几何效应（精度稀释）之和比电离层具有更大的位置误差。计算机仿真和实验表明可靠性得到了假设。此处给出的结果表明所有这些假设都是可行的。

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