BDS精密产品精度分析  

The Precision Analysis of BDS Precise Product

作　　者：敦力民[1] 王天文[1] 祝会忠[2] Dun Limin;Wang Tianwen;Zhu Huizhong(Shenyang Geotechnical Investigation & Surveying Research Institute Co.,Ltd.,Shenyang 110000,China;Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]沈阳市勘察测绘研究院有限公司,辽宁沈阳110004 [2]辽宁工程技术大学,辽宁阜新123000

出　　处：《城市勘测》2021年第4期68-73,共6页Urban Geotechnical Investigation & Surveying

摘　　要：由于北斗卫星导航系统的准确性和一致性可以有效保障用户高精度定位导航服务,本文采用一次差法和轨道连续法对iGMAS的不同分析中心提供的北斗精密轨道产品进行分析,采用二次差法对精密钟差产品进行分析,并通过分析精密单点定位的定位精度来比较不同分析中心精密轨道和钟差的差异。实验结果表明:①不同分析中心提供的钟差产品的精度差异较小;②BDS卫星的钟差精度与轨道类型有关,IGSO/MEO卫星的轨道精度较好,GEO卫星的轨道精度最差,其精度值均优于0.5 ns;③WRMS精密轨道产品中ISC分析中心的稳定性最好;④轨道连续性最好的卫星为C07和C11卫星,最差的为C02卫星;⑤利用PPP分析精密轨道/钟差产品精度,可得出对于CHD和SHA,CHD产品在N方向优于SHA产品,但是在E、U方向上的产品精度低于SHA;⑥对于WHU/CGS/LSN,CGS在E方向上精度质量最高,WHU产品在N方向质量最好,LSN产品在E方向质量最好。Due to the vigorous development of Beidou satellite navigation system,its accuracy and consistency of the products is high precision navigation and positioning services can be effectively safeguard,this paper adopts a differential method and the method of rail continuous iGMAS Beidou precision orbit products offered by different analysis center were analyzed,and the quadratic differential method is used to analyze the precision clock difference products,and through the analysis of the positioning accuracy of precise point positioning to compare different analysis center of poor precision orbit and clock difference.The experimental results show that:①The accuracy difference of clock difference products provided by different analysis centers is small;②The clock error accuracy of BDS satellite is related to the orbit type.The orbit accuracy of IGSO/MEO satellite is relatively good,while that of GEO satellite is the worst,with the accuracy value being better than 0.5ns.③ISC analysis center has the best stability among WRMS precision track products;④The satellites with the best orbital continuity are C07 and C11,and the worst are C02.⑤Using PPP to analyze the precision of precision rail/clock difference products,it can be concluded that for CHD and SHA,CHD products are superior to SHA products in the N direction,but the precision of products in the E and U directions is lower than SHA;⑥For WHU/CGS/LSN,CGS has the highest precision and quality in the E direction,WHU has the best quality in the N direction,and LSN has the best quality in the E direction.

关 键 词：北斗系统 精密轨道 钟差 精度评定 精密单点定位 

分 类 号：P228[天文地球—大地测量学与测量工程]