| 多GNSS系统精密定轨ISB/IFB估计及特性分析 |
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| 引用本文： | 党亚民,张龙平,陈俊勇.多GNSS系统精密定轨ISB/IFB估计及特性分析[J].武汉大学学报(信息科学版),2018,43(12):2079. |
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| 作者姓名： | 党亚民 张龙平 陈俊勇 |
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| 作者单位： | 1.中国测绘科学研究院, 北京, 100830 |
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| 基金项目： | 国家自然科学基金41474011 |
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| 摘 要： | 多全球导航卫星系统（Global Navigation Satellite System，GNSS）系统联合精密定轨需要考虑系统间及频率间偏差的影响。推导了多GNSS定轨系统间偏差（inter system bias，ISB）/频率间偏差（inter frequency bias，IFB）解算模型，以GPS系统硬件延迟为基准，给出了一种消除ISB/IFB秩亏的约束方法。试验数据结果表明，各系统ISB/IFB均表现出良好的稳定性及同一系统各卫星时间序列的一致性，BDS ISB的标准差为0.36 ns，Galileo ISB的标准差为0.18 ns，GLONASS IFB的标准差为0.51 ns；在接收机类型相同的情况下，不同跟踪站的ISB比较接近，但仍可达到ns级差异；GLONASS IFB在同一跟踪站相同频道号的卫星及不同跟踪站相同频道号卫星均表现出了良好的一致性。
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| 关 键 词： | GNSS 基准统一 精密定轨 系统间偏差 频率间偏差 |
| 收稿时间： | 2018-07-15 |
ISB/IFB Estimation and Characteristic Analysis with Multi-GNSS Precise Orbit Determination |
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| Institution: | 1.Chinese Academy of Surveying and Mapping, Beijing 100830, China |
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| Abstract: | The effects of inter system bias (ISB) and inter frequency bias (IFB) need to be taken into account in the multi-GNSS precise orbit determination. In this paper, the ISB/IFB estimation model in the context of the multi-GNSS orbit determination is derived. A constraint method for reduce the rank defect about ISB/IFB is presented based on the GPS datum. Experimental results from MGEX data indicate that ISBs/IFBs of the different system are of good stability, and have high consistency for satellite time series in each system. The standard deviation of the BDS ISB, Galileo ISB, GLONASS IFB are 0.36 ns, 0.18 ns, 0.51 ns, respectively. The ISBs from different monitoring stations are relatively closed to those stations with the same type receiver, but ns-level differences can be still achieved. The GLONASS IFBs are consistent with the same channel number satellites of the same monitoring station and different monitoring stations. |
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