﻿ BDS-3新信号B1C/B2a动态零基线观测噪声评估
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 大地测量与地球动力学  2023, Vol. 43 Issue (4): 364-368, 386  DOI: 10.14075/j.jgg.2023.04.006

### 引用本文

XU Zhenyu, CAI Changsheng, CUI Xianqiang, et al. Evaluation of Zero-Baseline Measurement Noise of BDS-3 New Signals B1C/B2a in Kinematic Mode[J]. Journal of Geodesy and Geodynamics, 2023, 43(4): 364-368, 386.

### Foundation support

National Key Research and Development Program of China, No.2020YFA0713501; National Natural Science Foundation of China, No.42174040; Natural Science Foundation of Hunan Province, No.2020JJ4111; Fund of State Key Laboratory of Geo-Information Engineering, No.SKLGIE2021-Z-2-1.

### Corresponding author

CAI Changsheng, PhD, professor, PhD supervisor, majors in GNSS navigation and precise positioning, E-mail: csucai@csu.edu.cn.

### 第一作者简介

XU Zhenyu, postgraduate, majors in GNSS data processing and precise positioning, E-mail: thebaldinnorth@csu.edu.cn.

### 文章历史

BDS-3新信号B1C/B2a动态零基线观测噪声评估

1. 中南大学地球科学与信息物理学院，长沙市麓山南路932号，410083;
2. 地理信息工程国家重点实验室，西安市雁塔路中段1号，710054

1 噪声测量方法

 $\begin{gathered} \mathrm{DD}_{\varphi}=\left(L^p-L^q\right)_m-\left(L^p-L^q\right)_n= \\ N_{m n}^{p q}+\left(\varepsilon_{\varphi}\right)_{m n}^{p q} \end{gathered}$ (1)
 $\mathrm{DD}_P=\left(P^p-P^q\right)_m-\left(P^p-P^q\right)_n=\left(\varepsilon_P\right)_{m m}^{p q}$ (2)

2 零基线接收机观测噪声分析

2.1 静态零基线实验

 图 1 四星座GNSS在不同频点上的静态双差伪距观测值噪声分布 Fig. 1 Distribution of double-differenced pseudorange measurement noise for quad-constellation GNSS ondifferent frequencies in static mode

 图 2 四星座GNSS在不同频点上的静态双差相位观测值噪声分布 Fig. 2 Distribution of double-differenced phasemeasurement noise for quad-constellation GNSS on different frequencies in static mode

2.2 动态零基线实验

 图 3 动态零基线数据采集轨迹及设备 Fig. 3 Trace and equipment of zero-baselinedata acquisition in kinematic mode

 图 4 四星座GNSS在不同频点上的动态双差伪距观测噪声分布 Fig. 4 Distribution of double-differenced pseudorange measurement noise forquad-constellation GNSS on different frequencies in kinematic mode

 图 5 四星座GNSS在不同频点上的动态双差载波相位观测噪声分布 Fig. 5 Distribution of double-differenced carrier phase measurement noise for quad-constellation GNSS on different frequencies in kinematic mode

3 结语

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Evaluation of Zero-Baseline Measurement Noise of BDS-3 New Signals B1C/B2a in Kinematic Mode
XU Zhenyu1     CAI Changsheng1,2     CUI Xianqiang1     ZHANG Jiatong1     ZHU Yongxing2
1. School of Geosciences and Info-Physics, Central South University, 932 South-Lushan Road, Changsha 410083, China;
2. State Key Laboratory of Geo-Information Engineering, 1 Mid-Yanta Road, Xi'an 710054, China
Abstract: To evaluate the receiver measurement noise of the new signals B1C and B2a of BDS-3 in kinematic mode, we determine the measurement noises of the new signals by zero-baseline kinematic test and compare the results with other GNSS signals. Meanwhile, we compare the kinematic results with the static mode. In the kinematic test, the RMS values of pseudorange noises of MEO satellites on B1C and B2a frequencies of BDS-3 are 8 cm and 4 cm, respectively, and the carrier phases are 0.061 cm and 0.082 cm, respectively. The measurement noise of IGSO satellites increases slightly. The pseudorange noise of each frequency of the four constellations are obviously different, but the phase noises range is not large. Although there is a decline in kinematic observation data quality, the overall pseudorange noises on B1C and B2a frequencies are not significantly different compared to static noises. However, the difference of the carrier phase noises is more significant.
Key words: zero-baseline; measurement noise; BDS-3; B1C; B2a