| 不同GNSS观测组合提取伪距多路径效果比较 |
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| 引用本文： | 刘保成,黄令勇,王俊超.不同GNSS观测组合提取伪距多路径效果比较[J].大地测量与地球动力学,2017,37(1):40-43. |
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| 作者姓名： | 刘保成 黄令勇 王俊超 |
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| 摘 要： | 推导了伪距多路径提取公式，计算了相应观测组合提取伪距多路径的组合系数。以载波噪声放大比例为评价指标，对比分析各组合观测提取伪距多路径的效果，然后利用BDS和GPS数据进行验证。结果表明，仅进行电离层一阶改正时，三频伪距/载波组合提取伪距多路径效果最好；基于三频二阶电离层改正的伪距多路径提取会过分放大载波噪声，但能消除电离层系统误差；基于双频组合提取伪距多路径时，两频率相差最大的观测组合提取伪距效果最好；同一组合观测提取不同频点伪距多路径时，提取最大频率信号上的伪距效果最好。
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| 关 键 词： | 多路径 双频 三频 BDS GPS |
Comparing the Effects of Extracting Pseudo-Range Multipath by Different GNSS Observation Combinations |
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| LIU Baocheng,HUANG Lingyong,WANG Junchao.Comparing the Effects of Extracting Pseudo-Range Multipath by Different GNSS Observation Combinations[J].Journal of Geodesy and Geodynamics,2017,37(1):40-43. |
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| Authors: | LIU Baocheng HUANG Lingyong WANG Junchao |
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| Abstract: | The pseudo-range multipath extraction formula is derived and the combination coefficients of corresponding observation combinations to extract pseudo-range multipath are calculated. The amplificatory scale of carrier noise is used as the evaluation factor to evaluate the effect of extracting pseudo-range multipath. Then the BDS and GPS data are used to validate these analyses. Finally, these conclusions are drawn: when only correcting the first-order ionospheric error, the extraction effect of triple-frequency pseudo-range/carrier phase observation combination is best. Although the carrier noise is excessively amplified based on triple-frequency second-order ionospheric correction, ionospheric system error is eliminated. When extracting the pseudo-range multipath by dual-frequency combination, the effect of the combination with the largest frequency difference is best; when the same observation is used to extract different pseudo-range multipaths, the pseudo-range multipath on the signal with the largest frequency is best. |
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| Keywords: | multipath dual-frequency triple-frequency BDS GPS |
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