Orbit determination, clock estimation and performance evaluation of BDS-3 PPP-B2b service

Tang, Chengpan; Hu, Xiaogong; Chen, Jinping; Liu, Li; Zhou, Shanshi; Guo, Rui; Li, Xiaojie; He, Feng; Liu, Jinhuo; Yang, Jianhua

doi:10.1007/s00190-022-01642-9

Cited by 26 publications

(8 citation statements)

References 31 publications

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“…For BDS-3 (BDS-3 + GPS), the static positioning accuracy was 2.6 (2.1) cm, the dynamic positioning accuracy was 21.5 (15.2) cm horizontally and 33.4 (30.3) cm vertically, with a convergence time of 17.4 (16.2) minutes. Other scholars have reported similar performance results [10][11][12][13] . Multi-frequency combination models are advantageous for speeding up PPP convergence 14 .…”

supporting

confidence: 69%

A static precise single-point positioning method based on carrier phase zero-baseline self-differencing

Lv,

Cai,

Cai

et al. 2024

Sci Rep

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Satellite navigation positioning has become an indispensable component of everyday life, where precise pinpointing and rapid convergence are crucial in delivering timely and accurate location information. However, due to the damping of integer ambiguities and system residual errors, the rapid convergence of Precise Point Positioning (PPP) implementation is a significant challenge. To address this, this paper proposes a novel Carrier Phase Zero-Baseline Self-Differencing Precise Point Positioning (CZS-PPP) technique and its ionosphere-free fusion model. By employing the proposed CZS-PPP approach in separate scenarios involving BDS-3, GPS, and dual-system settings, we systematically validate the efficacy of the method. The experimental results indicate that the convergence time of the method is less than 4 min in a single-system scenario. Furthermore, in a dual-system scenario, the method can achieve rapid convergence in less than 3 min. The CZS-PPP technique presented demonstrates the elimination of integer ambiguities and the effective suppression of system residuals, in comparison to the conventional method. The proposed approach has demonstrated remarkable performance across different systems, offering a promising new pathway for achieving PPP fast convergence in BDS/GNSS.

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supporting

confidence: 69%

A static precise single-point positioning method based on carrier phase zero-baseline self-differencing

Lv,

Cai,

Cai

et al. 2024

Sci Rep

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“…The algorithms for PPP-B2b matching and correcting LANV and CNAV ephemerides during the real-time precise orbit determination (RT POD) of LEO satellites are identical to those used in other scenarios, such as traditional PPP, with no distinction. Firstly, the Issue of Data State Space Representation (IOD SSR) should match between various types of messages before the corrections can be used together [10]. Secondly, the Issue of Data of the PRN mask (IODP) included in message types 4, 5, and 6 must be the same as the IODP of message type 1 before the corrections are made.…”

Section: Matching Algorithms Of Ppp-b2b Messagesmentioning

confidence: 99%

Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on GPS and BDS-3 PPP B2b Service

Shi,

Xu,

et al. 2024

Remote Sensing

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This study investigates and verifies the feasibility of the precise point positioning (PPP)-B2b enhanced real-time (RT) precise orbit determination (POD) of low Earth orbit (LEO) satellites. The principles and characteristics of matching various PPP-B2b corrections are introduced and analyzed. The performance and accuracy of broadcast ephemeris and PPP-B2b signals are compared and evaluated by referring to the precise ephemeris. The root mean square (RMS) errors in the Global Positioning System (GPS) and BeiDou Navigation Satellite System (BDS)-3 broadcast ephemeris orbits in the along direction are larger than those in the other two (radial and cross) directions, and correspondingly, the along component PPP-B2b corrections are greatest. The continuity and smoothness of the GPS and BDS-3 broadcast ephemeris orbits and clock offsets are improved with the PPP-B2b corrections. The availability of PPP-B2b corrections is comprehensively analyzed for the TJU-01 satellite. Several comparative schemes are adopted for the RT POD of the TJU-01 satellite using the broadcast ephemeris and PPP-B2b corrections. The RT POD performance is improved considerably with the broadcast ephemeris corrected by the PPP-B2b signals. The RMS of the RT orbital errors in the radial, along, and cross directions is 0.10, 0.13, and 0.09 m, respectively, using BDS-3 and GPS PPP-B2b corrections, with reference to the solutions calculated with the precise ephemeris. The accuracy is improved by 5.1%, 43.9%, and 28.7% in the three directions, respectively, relative to that achieved with the broadcast ephemeris. It is concluded that a greater proportion of received PPP-B2b satellite signals corresponds to a greater improvement in the accuracy of the RT POD of the LEO satellite.

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“…The satellite coordinates are precisely known for the center station by using the realtime orbit determination technique [20]. The ground antenna coordinates of the center station and the users are static, and they can be determined beforehand.…”

Section: Geometric Distance Delaymentioning

confidence: 99%

BDS-3 RDSS two-way time transfer with asymmetric delay compensation model

Ren¹,

Huang²,

Gong³

et al. 2022

Meas. Sci. Technol.

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In BDS-3 RDSS, there exists a natural two-way link between center station and user site. And the two-way link can be used to achieve time transfer. Traditionally, the RDSS two-way time transfer are realized by analogy with Two Way Satellite Time and Frequency Transfer (TWSTFT) technique. However, unlike TWSTFT, the signal propagation delays are not completely symmetrical in RDSS two-way link because of the differences in signal emission time. In this study, the model of two-way time transfer with BDS-3 RDSS is presented. An asymmetric delay compensation method is introduced to solve the asymmetry of RDSS signals and improve the accuracy of two-way time transfer. In addition, BDS-3 RDSS common clock difference experiments are designed to test the performance of two-way time transfer with asymmetric delay compensation model. Based on the analyses of the experimental results, three conclusions can be drawn. Firstly, the accuracy of RDSS two-way time transfer is improved when the asymmetric delay compensation model is applied. Secondly, BDS-3 RDSS two-way time transfer in different in-station beams and subbands do not have many discrepancies on the whole, and the standard deviation (STD) values of the BDS-3 RDSS time transfer results are from 1.7 ns to 2.6 ns for the test signals. Thirdly, two-way time transfer results are not affected generally by receiver coordinate errors.

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Orbit determination, clock estimation and performance evaluation of BDS-3 PPP-B2b service

Cited by 26 publications

References 31 publications

A static precise single-point positioning method based on carrier phase zero-baseline self-differencing

A static precise single-point positioning method based on carrier phase zero-baseline self-differencing

Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on GPS and BDS-3 PPP B2b Service

BDS-3 RDSS two-way time transfer with asymmetric delay compensation model

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