Preliminary analysis and evaluation of BDS-2/BDS-3 precise point positioning

Chen, Hua; Liu, Xuexi; Jiang, Weiping; Peng, Yingguo; Ju, Boxiao; Chen, Yan

doi:10.1016/j.asr.2021.07.044

Cited by 13 publications

(4 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PPP generally refers to a high-precision positioning technique using a dual-frequency GNSS receiver with pseudo-range observations, carrier phase observations, and products such as precision ephemeris and satellite clock solutions provided by some organizations, such as IGS [ 41 , 42 , 43 ]. In this paper, the PPP solution was performed on the BDS data for all the sites around the world during the reference day and the geomagnetic storm day [ 44 , 45 ].…”

Section: Discussionmentioning

confidence: 99%

A Novel Ionospheric Disturbance Index to Evaluate the Global Effect on BeiDou Navigation Satellite System Signal Caused by the Moderate Geomagnetic Storm on May 12, 2021

Cong

Yue

et al. 2023

Sensors

View full text Add to dashboard Cite

In this paper, we propose a new method to quantitatively evaluate the quality of the carrier phase observation signals of the BeiDou Navigation Satellite System (BDS) during weak and moderate geomagnetic storms. We take a moderate geomagnetic storm that occurred on 12 May 2021 during the 25th solar cycle as an example. The results show that the newly defined PAS (Percentage of Affected Satellites) index shows significant anomaly changes during the moderate geomagnetic storm. Its variation trend has good correlations with the geomagnetic storm Kp index and Dst index. The anomaly stations are mainly distributed in the equatorial region and auroral region in the northern and southern hemispheres. The proposed PAS index has a good indication for both BDS2 and BDS3 satellites. We further validated this index by calculating the Precise Point Position (PPP) positioning error. We found that the anomaly period of PAS has strong consistency with the abnormal period of PPP positioning accuracy. This study could provide methodological support for the evaluation of the signal quality and analysis of positioning accuracy for the BeiDou satellite navigation system under different space weather conditions.

show abstract

Section: Discussionmentioning

confidence: 99%

A Novel Ionospheric Disturbance Index to Evaluate the Global Effect on BeiDou Navigation Satellite System Signal Caused by the Moderate Geomagnetic Storm on May 12, 2021

Cong

Yue

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…is the frequency value of a satellite system; I s,sys r,1 is the tilted path ionospheric delay for the first frequency; d sys r,i and d s,sys i denote the pseudo-range hardware delay between the receiver antenna and the signal processor and between the signal generation and the satellite antenna launch for a system frequency, respectively; b sys r,i and b s,sys i denote the phase hardware delay between the receiver antenna and the signal processor and between the signal generation and the satellite antenna launch for a system frequency; λ i is the i frequency wavelength; N s r,i is the carrier phase circumference ambiguity; e s,sys r,i and ε s,sys r,i denote the observation noise and unmodeled error for the frequency pseudo-range and carrier phase observations. IF is often used in PPP to eliminate the ionospheric first-order term, thus reducing the influence of ionospheric delay on GNSS observations, and its observation equation can be written as follows [33][34][35]:…”

Section: Mathematical Modelmentioning

confidence: 99%

Algorithms Research and Precision Comparison of Different Frequency Combinations of BDS-3\GPS\Galileo for Precise Point Positioning in Asia-Pacific Region

Gao

Cao

Meng

et al. 2023

Sensors

View full text Add to dashboard Cite

With the continuous construction and development of the BeiDou navigation satellite system (BDS), its positioning performance is constantly being improved. In this study, the positioning performance of different frequency combinations of BDS-3/GPS/Galileo in the Asia-Pacific region was investigated. The precision products of Wuhan University and the observation data of nine MGEX stations were selected to compare and analyze the B1I\B1C\B2a\B3I and L1\E1 pseudo-range Standard Point Positioning (SPP) and B1IB2a\B1IB3I\B1CB2a\B1CB3I\B2aB3I\L1L2\E1E5a precise point positioning (PPP) performance, while B1I\B3I\L1 SPP and B1IB3I PPP were investigated using BDS-2 with QZSS supplemented with BDS-3 and GPS. The experimental results showed that the positioning precision of BDS-3/GPS/Galileo SPP was in the order of B1C > E1 > L1 > B1I > B3I > B2a, and it was not significantly improved after BDS-2 and QZSS were added. Moreover, for the PPP of different frequency combinations, the convergence speed was in the order of L1L2 > B1IB3I > E1E5a > B1CB3I > B1CB2a > B1IB2a > B2aB3I. After adding BDS-2, B1IB3I improved by about 11% in static mode and 27% in kinematic mode, which was similar to the L1L2 frequency combination. The positioning precision of different frequency combinations of BDS-3/GPS/Galileo was B1IB3I > B1CB3I > L1L2 > E1E5a > B1B2a > B1CB2a > B2aB3I. In static mode, after adding BDS-2, B1IB3I did not show significant improvement in the plane direction, and showed ~61% improvement in the elevation direction, and ~67% in the three-dimensional (3D) direction. In kinematic mode, after adding BDS-2, B1IB3I was improved by about 16% in the E direction, the N direction did not show significant change, it improved by ~38% in the U direction and by ~70% in the 3D direction. In general, the positioning performance of BDS-3 was slightly better than those of GPS and Galileo in the Asia-Pacific region, and it is believed that with the continuous development of BDS, its positioning performance will surely be improved further.

show abstract

“…China's BeiDou satellite navigation system (BDS) taking the lead in providing precision single-point positioning (PPP) onboard services in the international arena. How to enable BDS to provide more accurate services has turned into a popular research at the moment [1]. Reliable short-term forecast results * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

“…The strategies and methods employed in these models are still undergoing further expansion and exploration. Zhu et al employed the Kalman filter, recursive least squares, and the gray model GM (1,1) to forecast the short-term satellite clock bias within a day [3]. The findings indicate that the Kalman filter exhibits the highest level of forecasting accuracy.…”

Section: Introductionmentioning

confidence: 99%

An adaptive robust strategy based on hypothesis testing for satellite clock bias short-term forecasting

Su,

Gao,

et al. 2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

The study of short-term forecasting of satellite clock bias is important to promote the development of real-time precise point positioning, and the Kalman filter model has certain advantages over other models in the single forecast model. However, the filtering performance will be degraded by the model bias, and a fading factor is constructed to control the effect brought by the model bias. Considering that the fading factor may cause the covariance matrix to be abnormally inflated or even invalid when the observed information is unreliable, the chi-square test is introduced as a test indicator. At the current epoch moment, the fading factor or robust estimation is conditionally applied based on the result of the hypothesis test. An improved IGGIII weight function is used by the robust estimation, which simplifies the solution of the parametric robust solution. BDS-3 satellite clock bias data with different clock types were selected for the analysis of fitting accuracy and forecasting accuracy, and the experimental results showed that the proposed algorithm can well eliminate the anomalous perturbation phenomenon caused by model deviation and improve the fitting accuracy. The comparison of forecast accuracy between the proposed strategy and GM (1,1), QP, and ARIMA models at 3, 6, and 12-hour intervals reveals that the proposed strategy consistently demonstrates optimal forecast accuracy.

show abstract

Preliminary analysis and evaluation of BDS-2/BDS-3 precise point positioning

Cited by 13 publications

References 39 publications

A Novel Ionospheric Disturbance Index to Evaluate the Global Effect on BeiDou Navigation Satellite System Signal Caused by the Moderate Geomagnetic Storm on May 12, 2021

A Novel Ionospheric Disturbance Index to Evaluate the Global Effect on BeiDou Navigation Satellite System Signal Caused by the Moderate Geomagnetic Storm on May 12, 2021

Algorithms Research and Precision Comparison of Different Frequency Combinations of BDS-3\GPS\Galileo for Precise Point Positioning in Asia-Pacific Region

An adaptive robust strategy based on hypothesis testing for satellite clock bias short-term forecasting

Contact Info

Product

Resources

About