北斗三号B1C/B2a新频点信号数据质量和精密单点定位性能评估  

Evaluation of Data Quality and Precise Point Positioning Performance of BDS-3 B1C/B2a New Signals

作　　者：岳帆 黄观文[1] 解世超 林楠 赖文 李林慧 YUE Fan;HUANG Guanwen;XIE Shichao;LIN nan;LAI Wen;LI Linhui(College of Geological Engineering and Geomatics,Chang’an University,Xi’an 710054,China)

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054

出　　处：《测绘地理信息》2023年第6期20-25,共6页Journal of Geomatics

基　　金：国家重点研发计划(2018YFC1505105);国家自然科学基金(41941019);二代导航重大专项(GFZX0301040308);陕西省杰出青年基金(2019JC-20)。

摘　　要：利用10个MGEX(multi-GNSS experiment)测站连续一个月的观测数据对B1C/B2a新频点信号质量和精密单点定位(precise point positioning,PPP)服务性能进行全面评估,并将其结果与GPS L1/L2和BDS3 B1I/B3I频点结果进行对比。实验表明:在观测数据完整率方面,BDS-3 B1C/B2a频点观测数据完整率较高,达到98%以上;在伪距多路径误差方面,B2a伪距多路径误差较小,均值为18 cm,B1C频点结果稍大,但仍优于GPS的L1和L2频点;在载噪比方面,BDS-3各频点均优于GPS,B1C和B2a频点载噪比都在40 dBHz以上。在静态PPP结果方面,B1C/B2a收敛时间约27 min,与GPS较为接近,B1C/B2a信号在E、N、U方向的精度分别为1.39 cm、0.87 cm和1.83 cm;在动态PPP结果方面,B1C/B2a收敛时间约56 min,在E、N、U方向的精度分别为2.43 cm、1.77 cm和4.57 cm。综合来看,B1C/B2a新信号评估结果稍优于B1I/B3I频点结果。This paper uses the observation data of 10 MGEX(multi-GNSS experiment)stations for one consecutive month to comprehensively evaluate the signal quality of the new B1C/B2a signals and their service performance of PPP(pre⁃cise point positioning).The results are compared with GPS L1/L2 and BDS-3 B1I/B3I frequency signals.Experimental analysis shows that the integrity rate of BDS-3 B1C/B2a fre⁃quencies observation is higher than 98%.In terms of the pseu⁃do-distance multipath error,the B2a pseudo-distance multipa⁃th error is small,with an average value of 18cm,and the B1C result is slightly larger,but it is still better than the L1 and L2 frequencies of GPS.In terms of SNR,BDS-3 is superior to GPS in all frequencies,and the SNR of B1C and B2a frequen⁃cies is above 40dBHz.In terms of static PPP results,the con⁃vergence time of B1C/B2a is about 27 min,which is close to that of GPS,and the accuracy of B1C/B2a signals in the E,N,and U directions are 1.39 cm,0.87 cm,and 1.83 cm,re⁃spectively.In terms of dynamic PPP,the convergence time of B1C/B2a is about 56 min,and the accuracy in E,N,and U directions is 2.43 cm,1.77 cm,and 4.57 cm,respective⁃ly.Overall,the new B1C/B2a signals evaluation results are slightly better than the B1I/B3I frequency.

关 键 词：北斗三号 全球卫星导航定位系统 数据质量 精密单点定位 

分 类 号：P228[天文地球—大地测量学与测量工程]