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Wang Xilong, Xu Xiaolong, Zhao Qile. Signal Quality Analysis and Orbit Accuracy Verification of BDS-3[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20200577
Citation: Wang Xilong, Xu Xiaolong, Zhao Qile. Signal Quality Analysis and Orbit Accuracy Verification of BDS-3[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20200577

Signal Quality Analysis and Orbit Accuracy Verification of BDS-3

doi: 10.13203/j.whugis20200577
Funds:

The National Natural Science Foundation of China (No. 42030109) and China Postdoctoral Science Foundation (No. 2020M682483)

  • Received Date: 2021-05-23
  • On July 31, 2020, China's third generation Beidou satellite navigation system (BDS-3), which operates independently, will be fully completed and officially opened for service. The signal system of BDS-3 has been redesigned to provide public service signals of five frequencies:B1I, B3I, B1C, B2a and B2b. Based on the observations of international global navigation system monitoring and assessment service (iGMAS) and Multi-GNSS experiment (MGEX) tracking stations, this paper analyzes the characteristics of pseudoranges multipath error, signal to noise ratio, Geometry-Free Ionosphere-Free (GFIF) combined observations of the new signal system, as well as the precise orbit determination (POD) performance evaluation of BDS-3 satellites. The results show that the multipath noise level of BDS-3 satellites signal is better than that of BDS-2 satellites, and there is no systematic deviation related to altitude angle, B1C is more significantly affected by multipath and noise; the GFIF sequences of different signal combinations of BDS-3 satellites show periodic systematic error related to satellite, and the peak value is about 2cm. For BDS-3 satellites, the "one-step" POD method is used. The two frequencies ionospheric free combination of B1I & B3I and B1C & B2a is adopted respectively. The orbit boundary discontinuity and satellite laser ranging (SLR) carried out an orbit accuracy check, and the results show that when the number of available observations is less than B1I & B3I, the orbit accuracy of B1C & B2a is equivalent to that of B1I & B3I, and the radial internal coincidence accuracy is 6.1cm and 6.6cm respectively.
  • [1] Lv Y, Geng T, Zhao Q, et al. Characteristics of BeiDou-3 Experimental Satellite Clocks[J]. Remote Sensing,2018,10(11).
    [2] 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).
    [3] 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,2019,93(1).
    [4] Zhou R, Hu Z, Zhao Q, et al. Elevation-dependent pseudorange variation characteristics analysis for the new-generation Beidou satellite navigation system[J]. GPS Solutions,2018,22(3).
    [5] Xu X, Wang X, Liu J, et al. Characteristics of BD3 Global Service Satellites:POD, Open Service Signal and Atomic Clock Performance[J]. Remote Sensing,2019,11(13).
    [6] Montenbruck O, Hugentobler U, Dach R, et al. Apparent clock variations of the Block IIF-1(SVN62) GPS satellite[J]. GPS Solutions,2012,16(3).
    [7] Montenbruck O, Hauschild A, Steigenberger P, et al. Initial assessment of the COMPASS/BeiDou-2 regional navigation satellite system[J]. GPS Solutions,2013,17(2).
    [8] Zhao Q, Wang G, Liu Z, et al. Analysis of Beidou Satellite Measurements with Code Multipath and Geometry-Free Ionosphere-Free Combinations[J]. Sensors,2016,16(1).
    [9] Guo J, Xu X, Zhao Q, et al. Precise orbit determination for quad-constellation satellites at Wuhan University:strategy, result validation, and comparison[J]. Journal of Geodesy, 2016, 90(2):143-159.
    [10] Xu X, Li M, Li W, et al. Performance Analysis of Beidou-2/Beidou-3e Combined Solution with Emphasis on Precise Orbit Determination and Precise Point Positioning. Sensors 2018, 18, 135.
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Signal Quality Analysis and Orbit Accuracy Verification of BDS-3

doi: 10.13203/j.whugis20200577
Funds:

The National Natural Science Foundation of China (No. 42030109) and China Postdoctoral Science Foundation (No. 2020M682483)

Abstract: On July 31, 2020, China's third generation Beidou satellite navigation system (BDS-3), which operates independently, will be fully completed and officially opened for service. The signal system of BDS-3 has been redesigned to provide public service signals of five frequencies:B1I, B3I, B1C, B2a and B2b. Based on the observations of international global navigation system monitoring and assessment service (iGMAS) and Multi-GNSS experiment (MGEX) tracking stations, this paper analyzes the characteristics of pseudoranges multipath error, signal to noise ratio, Geometry-Free Ionosphere-Free (GFIF) combined observations of the new signal system, as well as the precise orbit determination (POD) performance evaluation of BDS-3 satellites. The results show that the multipath noise level of BDS-3 satellites signal is better than that of BDS-2 satellites, and there is no systematic deviation related to altitude angle, B1C is more significantly affected by multipath and noise; the GFIF sequences of different signal combinations of BDS-3 satellites show periodic systematic error related to satellite, and the peak value is about 2cm. For BDS-3 satellites, the "one-step" POD method is used. The two frequencies ionospheric free combination of B1I & B3I and B1C & B2a is adopted respectively. The orbit boundary discontinuity and satellite laser ranging (SLR) carried out an orbit accuracy check, and the results show that when the number of available observations is less than B1I & B3I, the orbit accuracy of B1C & B2a is equivalent to that of B1I & B3I, and the radial internal coincidence accuracy is 6.1cm and 6.6cm respectively.

Wang Xilong, Xu Xiaolong, Zhao Qile. Signal Quality Analysis and Orbit Accuracy Verification of BDS-3[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20200577
Citation: Wang Xilong, Xu Xiaolong, Zhao Qile. Signal Quality Analysis and Orbit Accuracy Verification of BDS-3[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20200577
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