Initial assessment of BDS-3 precise point positioning service on GEO B2b signal

Zhang, Weixing; Lou, Yidong; Song, Weiwei; Sun, Weibin; Zou, Xu; Gong, Xiaopeng

doi:10.1016/j.asr.2021.09.006

Cited by 25 publications

(7 citation statements)

References 19 publications

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“…As the result shows, the two solutions are close to each other actually in terms of statistics index (RMS) but different in time series, which is due to the accuracies of attitudes being mainly determined by IMU ( [28,46]). However, the GNSS data processing strategy would affect the estimation of attitudes at each epoch by Equation (14). A similar conclusion can also be obtained from the average maximum attitude drifts of the two methods from 1500 s to 2500 s with GNSS outages in Figure 24.…”

Section: Bssd Ppp/ins/odo Tci Attitude Determinationsupporting

confidence: 70%

Low-Cost IMU and Odometer Tightly Augmented PPP-B2b-Based Inter-Satellite Differenced PPP in Urban Environments

Min

Гао

et al. 2022

Remote Sensing

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Since 23 June 2020, BDS-3 has been entirely operated and obtained the ability of global PNT (Positioning, Navigation, and Timing) services. Afterward, real-time Precise Point Positioning (PPP) service is available in China’s surrounding areas via BDS-3 PPP-B2b signal. However, such a real-time PPP service cannot maintain the high accuracy and continuity of positioning solutions in challenging environments, such as urban environments. For that, we carried out a model by integrating between-satellite single-differenced (BSSD) PPP, a low-cost Inertial Navigation System (INS), and an odometer via an extended Kalman filter. The performance of this integration model was assessed with vehicle-borne data. Results demonstrated that (1) the position RMS (Root Mean Square) of BSSD PPP are 64.33 cm, 53.47 cm, and 154.11 cm. Compared with BSSD PPP, about 31.2%, 23.3%, and 27.3% position improvements can be achieved by using INS. Further enhancements of position RMS benefiting from the odometer are 1.34%, 1.41%, and 1.73% in the three directions. (2) Anyway, the accuracy of BSSD PPP/INS/Odometer tightly coupled integration is slightly higher than that of undifferenced PPP/INS/Odometer integration, with average improvement percentages of 7.71%, 3.09%, and 0.27%. Meanwhile, the performance of BSSD PPP/INS/Odometer integration during the periods with satellite outages is better than the undifferenced PPP-based solutions. (3) The improvements in attitudes from an odometer are more significant on heading angle than the other two attitudes, with percentages of 25.00%. (4) During frequent GNSS outage periods, the reduction in average maximum position drifts provided by INS are 18.01%, 8.95%, and 20.74%. After integrating with an odometer, the drifts can be furtherly decreased by 25.11%, 15.96%, and 20.69%. For attitude, about 41.67% reduction in average maximum drifts of heading angles is obtained.

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Section: Bssd Ppp/ins/odo Tci Attitude Determinationsupporting

confidence: 70%

Low-Cost IMU and Odometer Tightly Augmented PPP-B2b-Based Inter-Satellite Differenced PPP in Urban Environments

Min

Гао

et al. 2022

Remote Sensing

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“…This situation is about to change with the launch of the new Galileo High Accuracy Service (HAS;GSA 2020;Fernández-Hernández et al 2022) that will transmit free correction data for GPS and Galileo broadcast ephemerides through the E6B signal of Galileo. Other than the Centimeter Level Augmentation Service (CLAS; Namie and Kubo 2020) of the Japanese Quasi-Zenith Satellite System (QZSS) and the PPP-B2b Precise Point Positioning Service of the Chinese BeiDou-3 system (Zhang et al 2022), the Galileo HAS is designed as a fully global service, offering GPS and Galileo correction data for world-wide users. Next to terrestrial and aviation users, HAS corrections can also be received by satellites in low earth orbit, where they can provide essentially continuous access to precise GNSS orbit and clock data without a need for external data links.…”

Section: Introductionmentioning

confidence: 99%

Orbit determination of Sentinel-6A using the Galileo high accuracy service test signal

et al. 2022

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The High Accuracy Service (HAS) is an upcoming addition to the Galileo service portfolio that offers free correction data for precise point positioning in real-time. Beyond terrestrial and aeronautical applications, precise orbit determination (POD) of satellites in low Earth orbit (LEO) has been proposed as a potential use case for HAS corrections in view of their global availability. Based on HAS data collected during a test campaign in September 2021, the benefit of HAS corrections is assessed for real-time, onboard navigation as well as near real-time POD on the ground using GNSS observations of the Sentinel-6A LEO satellite. Compared to real-time POD using only broadcast ephemerides, performance improvements of about 40%, 10%, and 5% in terms of 3D position error can already be achieved for GPS-only, GPS + Galileo, and Galileo-only navigation. While Galileo processing benefits only moderately from the HAS correction data during the early tests in view of an already excellent Open Service performance, their use is highly advantageous for GPS processing and enables dual-constellation navigation with balanced contributions of both GNSSs for improved robustness. For near real-time offline POD, HAS corrections offer reduced latency or accuracy compared to established ultra-rapid GNSS orbit and clock products as well as independence from external sources.

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“…BDS-3 was the first to launch onboard real-time PPP services internationally. Researchers such as Zhang et al evaluated the static and dynamic positioning performance of PPP-B2b 9 . 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.…”

Section: Introductionmentioning

confidence: 99%

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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Initial assessment of BDS-3 precise point positioning service on GEO B2b signal

Cited by 25 publications

References 19 publications

Low-Cost IMU and Odometer Tightly Augmented PPP-B2b-Based Inter-Satellite Differenced PPP in Urban Environments

Low-Cost IMU and Odometer Tightly Augmented PPP-B2b-Based Inter-Satellite Differenced PPP in Urban Environments

Orbit determination of Sentinel-6A using the Galileo high accuracy service test signal

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

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