Preliminary analysis of observation quality and positioning precision for BDS-3 satellites

doi:10.13474/j.cnki.11-2246.2019.0241

Abstract

Abstract: Analysis of the BDS-3 observation quality is very important for the upcoming relevant applications and research of BDS-3. This paper evaluates the observation quality of BDS-3 satellites, including the carrier noise ratio (C/N₀), pseudo-range multipath, observation noise, and analyzes the precision of single-point positioning (SPP) and short-baseline relative positioning. The results show that the average C/N₀ values for B1I of BDS-3 satellites are 3~4 dB/Hz higher than those of BDS-2 satellites. In terms of BDS-3 satellites signals, the average C/N₀ values for B3I is the highest and the others are sizable. In the aspect of pseudo-range multipath values, B2a/B2b/B3I of BDS-3 working satellite and B3I of BDS-2 satellites are sizable, and those are slightly lower than that of B1I/B1C of BDS-3 satellites and that of B1I/B2I of BDS-2 satellites. As for observation noise, BDS-3 satellites and BDS-2 working satellites are on the same level. The precision of positioning that used BDS-2 and BDS-3 satellites is slightly greater than that only used BDS-2 satellites because of improving the observation geometry.

Key words: BDS-3 satellites, carrier noise ratio, pseudo-range multipath, observation noise, double-differenced residual, single-point positioning, relative positioning

CLC Number:

P228

CHENG Junlong, WANG Wang, MA Liye, LIU Wanke. Preliminary analysis of observation quality and positioning precision for BDS-3 satellites[J]. 测绘通报, 2019, 0(8): 1-7.

References

[1] 李征航, 黄劲松. GPS测量与数据处理[M]. 武汉:武汉大学出版社, 2005.
[2] 中国卫星导航系统管理办公室测试评估研究中心. 系统基本信息[EB/OL]. 2018-10-20[2018-11-10].http://www.csno-tarc.cn/system/constellation.
[3] LI X, XIE W, HUANG J, et al. Estimation and analysis of differential code biases for BDS3/BDS2 using iGMAS and MGEX observations[J]. Journal of Geodesy,2019,93(3):419-435.
[4] LI X, YUAN Y, ZHU Y, et al. Precise orbit determination for BDS3 experimental satellites using iGMAS and MGEX tracking networks[J]. Journal of Geodesy, 2018,92(7):1-15.
[5] TANG C, HU X, ZHOU S, et al. Initial results of centralized autonomous orbit determination of the new-generation BDS satellites with inter-satellite link measurements[J]. Journal of Geodesy, 2018,92(3-4):1-15.
[6] ZHAO Q, WANG C, GUO J, et al. Precise orbit and clock determination for BeiDou-3 experimental satellites with yaw attitude analysis[J]. GPS Solutions, 2018, 22(1):4.
[7] ZHANG X, WU M, LIU W, et al. Initial assessment of the COMPASS/BeiDou-3:new-generation navigation signals[J]. Journal of Geodesy, 2017, 91(1):1-16.
[8] International GNSS Service(IGS). IGS_MGEX_Status_BDS[EB/OL]. 2018-11-10[2018-11-10].http://mgex.igs.org/IGS_MGEX_Status_BDS.php.
[9] 张小红, 丁乐乐. 北斗二代观测值质量分析及随机模型精化[J]. 武汉大学学报(信息科学版), 2013, 38(7):832-836.
[10] CAI C, GAO Y, PAN L, et al. An analysis on combined GPS/COMPASS data quality and its effect on single point positioning accuracy under different observing conditions[J]. Advances in Space Research, 2014, 54(5):818-829.
[11] XU Y, JI S. Data quality assessment and the positioning performance analysis of BeiDou in Hong Kong[J]. Empire Survey Review, 2015, 47(345):446-457.
[12] 虞顺. BDS-3试验星/Galileo卫星观测数据质量评估方法与结果对比分析[D]. 武汉:武汉大学, 2017.
[13] 巴晓辉, 刘海洋, 郑睿,等. 一种有效的GNSS接收机载噪比估计方法[J]. 武汉大学学报(信息科学版), 2011, 36(4):457-460.
[14] 吴明魁. GNSS多系统紧组合精密相对定位的模型与方法[D]. 武汉:武汉大学, 2017.
[15] 李晓光, 程鹏飞, 成英燕,等. GNSS数据质量分析[J]. 测绘通报, 2017(3):1-4.
[16] 白征东, 吴刚祥, 任常. 北斗观测数据的质量检查与分析[J]. 测绘通报, 2014(6):10-13.
[17] 李军, 王继业, 熊熊,等. 东北亚地区GPS观测数据质量检测和分析[J]. 武汉大学学报(信息科学版), 2006, 31(3):209-212.
[18] WANNINGER L, BEER S. BeiDou satellite-induced code pseudorange variations:diagnosis and therapy[J]. GPS Solutions, 2015, 19(4):639-648.