Development Status and Service Performance Preliminary Analysis for BDSBAS

Cao, Yue; Chen, Jinping; Liu, Li; Hu, Xiaogong; Liu, Yuchen; Xiao, Jie; Zhao, Liqian; Tian, Qiuning; Zhou, Shanshi; Wu, Bin

doi:10.3390/rs14174314

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…The accuracies for R, A, and C direction are 19.20 cm, 62.70 cm, and 57.08 cm, respectively. During DOY 091-096, only 18 GPS satellites corrections can be broadcast by BDSBAS, which is fewer than the number corrected by PPP-B2b (26) and CNES (32). This limitation is due to BDSBAS service correction base on L1/L5 frequency.…”

Section: Real-time Orbit Accuracy Analysismentioning

confidence: 99%

“…Zhang et al [29,30] evaluated the availability of BDSBAS signal frequency (SF) service, the results indicated its low availability, particularly at the boundary of the service area. Xin et al [31][32][33] analyzed the performance of the Double-Frequency Multi-Constellation (DFMC) service of the BDSBAS. they came to the conclusion that the dual-frequency augmentation has significantly improved positioning accuracy.…”

Section: Introductionmentioning

confidence: 99%

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Performance Evaluation of Precise Point Positioning Based on Multiple Real-Time Augmentation Information

Wu,

Wang,

Xie

et al. 2024

Preprint

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The most commonly used real-time augmentation services in China are International GNSS Service (IGS) real-time service, PPP-B2b service, and BeiDou Satellite-Based Augmentation System (BDSBAS) dual-frequency augmentation service. However, the research on the performance evaluation, comparison and application scope of these three products is still unknown and unrevealed. This article introduces methods for obtaining real-time augmentation information and real-time orbit and clock offset recovery. Based on real-time orbit and clock offset accuracy, positioning accuracy, and positioning availability, it systematically evaluates the performance of CNES, PPP-B2b, and BDSBAS augmentation information. The results indicate that the radial accuracy of CNES and PPP-B2b real-time orbit products is consistent, and the Root Mean Square (RMS) is better than 5 cm. CNES can achieve centimeter-level accuracy in both along-track and cross-track components, surpassing the decimeter-level accuracy of PPP-B2b. Both services demonstrate consistent accuracy in real-time clock offset, with PPP-B2b showing similar standard deviations (STD) of 0.16 ns for different satellites. However, for CNES, the STD of real-time clock offset varies for GPS, BDS-3 MEO, and BDS-3 IGSO satellites, with values of 0.10 ns, 0.19 ns, and 0.60 ns, respectively. The accuracy and availability of the two PPP services exhibit the same levels, with centimeter-level accuracy achieved after convergence and positioning availability exceeding 99%. Therefore, the difference between the two services in application areas depends on the acquisition of augmentation information. However, BDSBAS, which concentrates on code observations, demonstrates lower accuracy in real-time orbit and clock offset, positioning accuracy, and positioning availability compared to the other two services. Its primary application is in the aviation and maritime domains, where there is a greater need for service integrity, continuity, and reliability.

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Section: Real-time Orbit Accuracy Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Precise Point Positioning Based on Multiple Real-Time Augmentation Information

Wu,

Wang,

Xie

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The accuracies for the R, A, and C direction are 19.20 cm, 62.70 cm, and 57.08 cm, respectively. During the Day Of Year (DOY) 091-096, only 18 GPS satellites corrections can be broadcast by BDSBAS, which is fewer than the number corrected by PPP-B2b (26) and CNES (32). This limitation is due to the BDSBAS service correction based on L1/L5 frequencies, and some GPS satellites do not support the L1/L5 frequencies [6].…”

Section: Real-time Product Quality Analysis 231 Real-time Orbit Accur...mentioning

confidence: 99%

“…Zhang et al [24,25] evaluated the availability of the BDSBAS single-frequency (SF) service, the results indicated its low availability, particularly at the boundary of the service area. Cao et al [26,27] analyzed the performance of the Double-Frequency Multi-Constellation (DFMC) service of the BDSBAS in a multifaceted way. They came to the conclusion that dual-frequency augmentation has significantly improved positioning accuracy.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation and Application Field Analysis of Precise Point Positioning Based on Different Real-Time Augmentation Information

Wu,

Wang,

Xie

et al. 2024

Remote Sensing

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The most commonly used real-time augmentation services in China are the International GNSS Service’s (IGS) real-time service (RTS), PPP-B2b service, and Double-Frequency Multi-Constellation (DFMC) service of the BeiDou Satellite-Based Augmentation System (BDSBAS) service. However, research on the performance evaluation, comparison, and application scope of these three products is still incomplete. This article introduces methods for obtaining real-time augmentation information and real-time orbit and clock offset recovery. Based on real-time orbit and clock offset accuracy, positioning accuracy, and positioning availability, this article systematically evaluates the performance and analyzes the application fields of Centre National d’Études Spatiales (CNES), PPP-B2b, and BDSBAS augmentation information. The results of the evaluation revealed that the radial accuracy of the CNES and PPP-B2b real-time orbit product is consistent, and the Root Mean Square (RMS) is better than 5 cm. The CNES real-time orbit product can achieve centimeter-level accuracy in both along-track and cross-track components, surpassing PPP-B2b’s decimeter-level accuracy. Both services demonstrate consistent accuracy in the real-time clock offset, with PPP-B2b showing similar standard deviations (STDs) of 0.16 ns for different satellites. However, for CNES, the STD of the real-time clock offset varies, with values of 0.10 ns, 0.19 ns, and 0.60 ns, respectively, for GPS, BDS-3 Medium Earth Orbit (MEO), and BDS-3 Inclined Geosynchronous Satellite Orbit (IGSO) satellites. Centimeter-level accuracy is achieved after convergence and positioning availability exceeds 99% for CNES and PPP-B2b services. Therefore, the difference between the two services in application areas depends on the acquisition of augmentation information. However, BDSBAS, which concentrates on code observations, demonstrates inferior performance in real-time orbit, clock offset, positioning accuracy, and positioning availability when compared to the other two services. Its primary application is in the aviation and maritime domains, where there is a greater need for service integrity, continuity, and reliability.

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“…Navigation system refers to the general term of all equipment combinations that can complete certain navigation and positioning tasks. At present, the main navigation systems include radio navigation system [1,2], satellite navigation system [3][4][5], astronomical navigation system [6], inertial navigation system [7,8] and integrated navigation system [9][10][11], etc.…”

Section: Introductionmentioning

confidence: 99%

An GNSS/INS Integrated Navigation Algorithm Based on PSO-LSTM in Satellite Rejection

et al. 2023

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When the satellite signal is lost or interfered with, the traditional GNSS (Global Navigation Satellite System)/INS (Inertial Navigation System) integrated navigation will degenerate into INS, which results in the decrease in navigation accuracy. To solve these problems, this paper mainly established the PSO (particle swarm optimization) -LSTM (Long Short-Term Memory) neural network model to predict the increment of GNSS position under the condition of satellite rejection and accumulation to obtain the pseudo-GNSS signal. The signal is used to compensate for the observed value in the integrated system. The model takes the advantages of LSTM, which is good at processing time series, and uses PSO to obtain the optimal value of important hyperparameters efficiently. Meanwhile, the improved threshold function is used to denoise the IMU (inertial measurement unit) data, which improves the SNR (signal-to-noise ratio) of IMU outputs effectively. Finally, the performance of the algorithm is proved by actual road test. Compared with INS, the method can reduce the maximum errors of latitude and longitude by at least 98.78% and 99.10% while the satellite is lost for 60 s, effectively improving the accuracy of the GNSS/INS system in satellite rejection.

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Development Status and Service Performance Preliminary Analysis for BDSBAS

Cited by 6 publications

References 16 publications

Performance Evaluation of Precise Point Positioning Based on Multiple Real-Time Augmentation Information

Performance Evaluation of Precise Point Positioning Based on Multiple Real-Time Augmentation Information

Performance Evaluation and Application Field Analysis of Precise Point Positioning Based on Different Real-Time Augmentation Information

An GNSS/INS Integrated Navigation Algorithm Based on PSO-LSTM in Satellite Rejection

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