Acta Geodaetica et Cartographica Sinica ›› 2023, Vol. 52 ›› Issue (6): 871-883.doi: 10.11947/j.AGCS.2023.20220355

• Geodesy and Navigation •     Next Articles

Single station velocity determination of BDS-3 carrier phase observations with the constraints of heading angle

WANG Qianxin1, HU Chao2, WANG Zejie1   

  1. 1. School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China;
    2. School of Spatial Informatics and Geomatics Engineering, Anhui University of Science and Technology, Huainan 232001, China
  • Received:2022-06-02 Revised:2023-05-22 Published:2023-07-08
  • Supported by:
    The National Key Research and Development Program of China (No. 2020YFA0713502); The Anhui Natural Science Foundation (No. 2108085QD173); The National Natural Science Foundation of China (No. 41874039); The Jiangsu Natural Science Foundation (No. BK20191342); The Natural Science Foundation of Anhui Colleges (No. KJ2020A0310)

Abstract: Velocity information is one of key state representations of the vehicle motion. The high-accuracy and reliable velocity based on BDS-3 observation is the requirements of BDS-3 high performance. To overcome impacts of error accumulation and observation environment on the traditional time-difference carrier phase (TDCP) model, a single station velocity determination of BDS-3 carrier phase observations with the constraints of heading angle is proposed. Firstly, the differential function of the undifferenced observation equation is constructed beside the traditional BDS-3 TDCP model, which is combined to simultaneously estimate the displacement increment of two adjacent epochs. Secondly, the correlation between displacement increments of horizontal plane and heading angle is used to construct the constraints of N and E directions. Thirdly, the combination of three groups of independent function equations is used to obtain the incremental displacement of vehicle epoch by epoch. According to static and kinematic experiments, it is indicated that an accuracy with mm/s level of velocity determination can be achieved in different directions under BDS-3 phase observations. Compared with the traditional TDCP method, the proposed method can improve the velocity accuracy of E and N directions with 62.9% and 87.5%, respectively, in which the accuracy of U direction is not significantly improved or even slightly decreased. Meanwhile, under the kinematic condition, it is suggested that BDS-3 phase velocimetry can obtain the accuracy of mm/s level in the horizontal plane of linear motion, in which E and N direction are 35.2% and 21.8% better than the traditional TDCP model. Furthermore, the accuracy of E, N and U directions in change direction is 2.81, 2.03, 1.91 cm/s, respectively, which is 45.9%, 41.2% and 56.2% higher than that of the traditional model. Therefore, the proposed single station phase velocity determination model considering heading angle constraints can effectively improve the velocity determination performance of BDS-3 satellite system.

Key words: BDS-3, phase velocimetry, heading angle constraints, time-difference carrier phase, single station velocity determination

CLC Number: