| 不同截止高度角下BDS-3SPP精度分析 |
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| 引用本文： | 朱玉香,陈永贵,安春华.不同截止高度角下BDS-3SPP精度分析[J].测绘通报,2021,0(3):23-27. |
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| 作者姓名： | 朱玉香 陈永贵 安春华 |
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| 作者单位： | 河南测绘职业学院,河南 郑州451464;河南省科学院地理研究所,河南 郑州450052 |
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| 基金项目： | 河南省高等学校重点科研项目(20B170002);河南省高校人文社会科学研究项目(2021-ZZJH-035)。 |
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| 摘 要： | 针对卫星可见数与历元可用率较低情况下的BDS-3定位性能，本文基于MEGX跟踪站BDS-3与GPS实测数据，分析了不同高度角（10°、20°、30°、40°）下BDS-3卫星B1I、B1C、B2a、B3I，以及GPS系统L1频率的单点定位（SPP）精度。研究发现，BDS-3平均卫星可见数与卫星空间几何构型优于GPS，且随着高度角的增加呈线性变化。BDS-3的4个频率的SPP精度随着高度角的增加呈先增加后降低的趋势，高度角为20°时，定位精度最高，高度角达到40°时，定位精度最低，且历元可用率也最低；但B1I和B3I历元可用率仍大于90%，而B1C和B2a历元可用率大于70%；不论是SPP定位精度还是历元可用率，均优于GPS系统L1频率。
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| 关 键 词： | BDS-3 SPP 不同高度角 历元可用率 |
| 收稿时间： | 2020-09-09 |
SPP accuracy analysis of BDS-3 under different masking angles |
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| ZHU Yuxiang,CHEN Yonggui,AN Chunhua.SPP accuracy analysis of BDS-3 under different masking angles[J].Bulletin of Surveying and Mapping,2021,0(3):23-27. |
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| Authors: | ZHU Yuxiang CHEN Yonggui AN Chunhua |
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| Institution: | 1. Henan Collage of Surveying and Mapping, Zhengzhou 451464, China;2. Institute of Geography, Henan Academy of Sciences, Zhengzhou 450052, China |
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| Abstract: | Aiming at the BDS-3 positioning performance under the condition of low satellite visibility and epoch availability,this paper analyzes different altitude angles( 10°,20°,30°,BDS-3 and GPS measured data from MEGX tracking station). 40°) SPP positioning accuracy of BDS-3 satellites B1I,B1C,B2a,B3I and GPS system L1 frequency. It is found through research that the average number of visible satellites and satellite spatial geometry of BDS-3 are better than GPS,and it changes linearly with the increase of the altitude angle. The SPP positioning accuracy of the four frequencies of BDS-3 increases first and then decreases with the increase of the altitude angle. When the altitude angle is 20°,the positioning accuracy is the highest. When the altitude angle reaches 40°,the positioning accuracy is the lowest,and the epoch availability rate is also the lowest. But the availability rate of the B1I and B3I epochs is still greater than 90%,while the availability rate of the B1C and B2a epochs is greater than 70%. Both the SPP positioning accuracy and the epoch availability are better than the GPS system L1 frequency. |
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| Keywords: | BDS-3 SPP different elevation angles epoch availability rate |
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