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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Performance Analysis of Beidou-2/Beidou-3e Combined Solution with Emphasis on Precise Orbit Determination and Precise Point Positioning
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Performance Analysis of Beidou-2/Beidou-3e Combined Solution with Emphasis on Precise Orbit Determination and Precise Point Positioning

机译：Beidou-2 / Beidou-3e混合解的性能分析重点在于精确的轨道确定和精确的点定位

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In 2015, the plan for global coverage by the Chinese BeiDou Navigation Satellite System was launched. Five global BeiDou experimental satellites (BeiDou-3e) are in orbit for testing. To analyze the performances of precise orbit determination (POD) and precise point positioning (PPP) of onboard BeiDou satellites, about two months of data from 24 tracking stations were used. According to quality analysis of BeiDou-2/BeiDou-3e data, there is no satellite-induced code bias in BeiDou-3e satellites, which has been found in BeiDou-2 satellites. This phenomenon indicates that the quality issues of pseudorange data in BeiDou satellites have been solved well. POD results indicate that the BeiDou-3e orbit precision is comparable to that of BeiDou-2 satellites. The ambiguity fixed solution improved the orbit consistency of inclined geosynchronous orbit satellites in along-track and cross-track directions, but had little effect in the radial direction. Satellite laser ranging of BeiDou-3e medium Earth orbit satellites (MEOs) achieved a standard deviation of about 4 cm. Differences in clock offset series after the removal of reference clock in overlapping arcs were used to assess clock quality, and standard deviation of clock offset could reach 0.18 ns on average, which was in agreement with the orbit precision. For static PPP, when BeiDou-3e satellites were included, the positioning performance for horizontal components was improved slightly. For kinematic PPP, when global positioning satellites (GPS) were combined with BeiDou-2 and BeiDou-3e satellites, the convergence time was 13.5 min with a precision of 2–3 cm for horizontal components, and 3–4 cm for the vertical component.
机译：2015年，启动了中国北斗导航卫星系统的全球覆盖计划。五颗全球北斗实验卫星（BeiDou-3e）正在轨道上进行测试。为了分析北斗卫星的精确轨道确定（POD）和精确点定位（PPP）的性能，使用了来自24个跟踪站的大约两个月的数据。根据北斗2 /北斗3e数据的质量分析，在北斗2e卫星中没有发现北斗3e卫星存在卫星引起的代码偏差。这一现象表明北斗卫星伪距数据的质量问题已经得到很好的解决。 POD结果表明，北斗3e的轨道精度与北斗2卫星的精度相当。含糊不清的固定解改善了倾斜地球同步轨道卫星沿轨道和跨轨道方向的轨道一致性，但对径向影响很小。北斗3e中地球轨道卫星（MEO）的卫星激光测距实现了约4 cm的标准偏差。以去除重叠弧中的参考时钟后的时钟偏移序列的差异来评估时钟质量，时钟偏移的标准偏差平均可以达到0.18 ns，这与轨道精度一致。对于静态PPP，当包含北斗3e卫星时，水平组件的定位性能会略有提高。对于运动学PPP，将全球定位卫星（GPS）与BeiDou-2和BeiDou-3e卫星结合使用时，收敛时间为13.5分钟，水平分量的精度为2-3 cm，垂直分量的精度为3-4 cm 。

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