| BDS/Galileo紧组合系统间偏差估计与模糊度固定效果分析 |
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| 引用本文： | 周英东,柴洪洲,王敏,潘宗鹏.BDS/Galileo紧组合系统间偏差估计与模糊度固定效果分析[J].测绘科学技术学报,2017,34(2). |
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| 作者姓名： | 周英东 柴洪洲 王敏 潘宗鹏 |
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| 作者单位： | 信息工程大学,河南郑州,450001 |
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| 摘 要： | 多个卫星导航系统采用相同频率播发信号,使得不同系统之间可以通过紧组合方式进行数据处理。文中简要介绍了不同系统紧组合双差观测模型;利用零短基线观测数据估计了BDS/Galileo间小数ISB(Inter-System Bias);对其时变稳定性进行了分析并利用单历元相对定位解算进行了验证。实验结果表明,小数ISB具有较好的时间稳定性,能够进行长期预报。相对于松组合相对定位模型,采用紧组合模型能够显著提高模糊度固定的成功率。
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| 关 键 词： | 北斗卫星导航系统 伽利略系统 相对定位 紧组合 系统偏差 |
Assessment of BDS/Galileo Inter-System Biases and Their Effect on Ambiguity Resolution |
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| ZHOU Yingdong,CHAI Hongzhou,WANG Min,PAN Zongpeng.Assessment of BDS/Galileo Inter-System Biases and Their Effect on Ambiguity Resolution[J].Journal of Zhengzhou Institute of Surveying and Mapping,2017,34(2). |
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| Authors: | ZHOU Yingdong CHAI Hongzhou WANG Min PAN Zongpeng |
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| Abstract: | With several satellite navigation systems transmitting signals on same frequencies,it is possible that processing GNSS observations from different systems by the tightly combination method.The tightly combination processing model among different systems was derived.Then based on zero and short baselines,the fractional intersystem biases(ISBs) between BDS and Galileo were estimated.Finally these ISBs were confirmed by a single-epoch relative positioning experiment.The results show that ISB can be forecasted in long term because it is very stable in time.Compared with the classical double difference model,for single-frequency RTK,the tightly combination model can significantly improve success rate of ambiguity resolution. |
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| Keywords: | BDS Galileo relative positioning tightly combination ISB(Inter-System Bias) |
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