| ?????????????????GPS/BD2????λ??????? |
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| 引用本文： | 高晓,戴吾蛟.?????????????????GPS/BD2????λ???????[J].大地测量与地球动力学,2013,33(2):136-138. |
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| 作者姓名： | 高晓 戴吾蛟 |
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| 作者单位： | 中南大学地球科学与信息物理学院,长沙410083;湖南省精密工程测量与形变灾害监测重点实验室,长沙410083 |
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| 基金项目： | 湖南省国土资源厅科技项目，中南大学前沿研究计划 |
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| 摘 要： | ????GPS??????????BD2????????????????????????λ?????????????????????????????????Helmert????????????????????????α?????????λ??????α????λ????λ????λ????????з??????????????Helmert????????????????GPS/BD2????λ????????????α?????????????21????λ????????11??
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| 关 键 词： | ??????????? GPS/BD2????λ α????λ ??λ????λ ??? |
| 收稿时间： | 2012-10-18 |
DETERMINATION OF PRIOR WEIGHT RATIO FOR COMBINED GPS-BD2 POSITIONING BASED ON VARIANCE COMPONENT ESTIMATION |
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| Gao Xiao,Dai Wujiao.DETERMINATION OF PRIOR WEIGHT RATIO FOR COMBINED GPS-BD2 POSITIONING BASED ON VARIANCE COMPONENT ESTIMATION[J].Journal of Geodesy and Geodynamics,2013,33(2):136-138. |
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| Authors: | Gao Xiao Dai Wujiao |
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| Institution: | 1)School of Geoscience and Info Physics, Central South University, Changsha 410083
2)Key Laboratory of Precise Engineering of Surveying &; Deformation Disaster Monitoring of Hunan Province, Changsha 410083 |
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| Abstract: | The optimum weight ratio of different observation values should be obtained in combined GPS BD2 positioning since there is a systematic difference between GPS and BD2. The variance component estimation（VCE） formula is used to determine the variance ratios of GPS and BD2 observations in the pseudorange single point positioning and phase relative positioning. The statistics of RMS of positioning errors with different weight ratios indicate that the results of VCE are reasonable and the prior weight ratios of GPS BD2 pseudorange and phase observations can be 2∶1 and 1∶1 respectively. |
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| Keywords: | variance component estimation combined GPS/BD2 positioning pseudorange single point positioning phase relative positioning weight ratio |
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