New-Generation BeiDou (BDS-3) Experimental Satellite Precise Orbit Determination with an Improved Cycle-Slip Detection and Repair Algorithm

Hu, Chao; Wang, Qianxin; Wang, Zhongyuan; Moraleda, Alberto Hernández

doi:10.3390/s18051402

Cited by 22 publications

(20 citation statements)

References 29 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In orbit determination, un-differenced ionosphere-free code and a phase combination of B1I and B3I observations were conducted. Moreover, the arc length is set to three-days, and a parameter configuration similar to [10,13] is used. It is noted that the un-differenced and double-differenced methods are two popular data processing strategies for orbit determination, and they each have their own advantages and disadvantages.…”

Section: Ultra-rapid Orbit Determination Based On Clock Offsets Constmentioning

confidence: 99%

“…In the experiment, the constraint of the clock offset parameter is taken as a condition equation to estimate the orbit determination parameter. In this study, the clock accuracies of the precise clock and broadcast clock are set as 10 m and 5000 m, respectively, which are referenced in [8,13]. Similarly, experiments using 31 days (DOY 30-60, 2019) of data are conducted for the analyses of the orbit results estimated from the use of the constraints on the clock parameters.…”

Section: Ultra-rapid Orbit Determination Based On Clock Offsets Constmentioning

confidence: 99%

“…For BDS, research over BDS-2's orbit and clock offset has been mainly focused on the following three key aspects: (1) based on the available regional tracking network [6,7], the data processing strategies are constrained to a small number, and uneven geographical distribution, of ground tracking stations; (2) satellite geometric and physical models are refined [8][9][10], such as attitude models, sun radiation pressure, and the phase centre; (3) multi-GNSS observations are combined to augment BDS-2's performance. BDS-2's orbit determination has been studied extensively to improve accuracy and the relevant algorithms [11][12][13]. Results showed that the three-dimensional root-mean-square error (3D RMS) of the BDS-2's one-day overlapping arc for MEO (and IGSO) and GEO were improved from 0.5 m and 3.0 m to 0.2 m and 1.0 m, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A BDS-2/BDS-3 Integrated Method for Ultra-Rapid Orbit Determination with the Aid of Precise Satellite Clock Offsets

Wang

Zhang

2019

Remote Sensing

Self Cite

View full text Add to dashboard Cite

The accuracy of ultra-rapid orbits is a key parameter for the performance of GNSS (Global Navigation Satellite System) real-time or near real-time precise positioning applications. The quality of the current BeiDou demonstration system (BDS) ultra-rapid orbits is lower than that of GPS, especially for the new generational BDS-3 satellites due to the fact that the availability of the number of ground tracking stations is limited, the geographic distribution of these stations is poor, and the data processing strategies adopted are not optimal. In this study, improved data processing strategies for the generation of ultra-rapid orbits of BDS-2/BDS-3 satellites are investigated. This includes both observed and predicted parts of the orbit. First, the predicted clock offsets are taken as constraints in the estimation process to reduce the number of the unknown parameters and improve the accuracy of the parameter estimates of the orbit. To obtain more accurate predicted clock offsets for the BDS’ orbit determination, a denoising method (also called the Tikhonov regularization algorithm), inter-satellite correlation, and the partial least squares method are all incorporated into the clock offsets prediction model. Then, the Akaike information criterion (AIC) is used to determine the arc length in the estimation models by taking the optimal arc length in the estimation of the initial orbit states into consideration. Finally, a number of experiments were conducted to evaluate the performance of the ultra-rapid orbits resulting from the proposed methods. Results showed that: (1) Compared with traditional models, the accuracy improvement of the predicted clock offsets from the proposed methods were 40.5% and 26.1% for BDS-2 and BDS-3, respectively; (2) the observed part of the orbits can be improved 9.2% and 5.0% for BDS-2 and BDS-3, respectively, by using the predicted clock offsets as constraints; (3) the accuracy of the predicted part of the orbits showed a high correlation with the AIC value, and the accuracy of the predicted orbits could be improved up to 82.2%. These results suggest that the approaches proposed in this study can significantly enhance the accuracy of the ultra-rapid orbits of BDS-2/BDS-3 satellites.

show abstract

Section: Ultra-rapid Orbit Determination Based On Clock Offsets Constmentioning

confidence: 99%

Section: Ultra-rapid Orbit Determination Based On Clock Offsets Constmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A BDS-2/BDS-3 Integrated Method for Ultra-Rapid Orbit Determination with the Aid of Precise Satellite Clock Offsets

Wang

Zhang

2019

Remote Sensing

Self Cite

View full text Add to dashboard Cite

show abstract

“…The distributed autonomous ephemeris updating were discussed for navigation satellites [22]. There are also many researches on developing higher precision orbit determination methods for new BeiDou (BDS-3) experimental satellites in the literature [23][24][25][26]. Currently, the developments for autonomous orbit determination, time synchronization, and autonomous operation and management are wildly investigated.…”

Section: Overview Of Orbit Determination Algorithmsmentioning

confidence: 99%

Distributed Orbit Determination for Global Navigation Satellite System with Inter-Satellite Link

Wen

Zhu

Gong

et al. 2019

Preprint

View full text Add to dashboard Cite

To keep the global navigation satellite system functional during extreme conditions, it is a trend to employ autonomous navigation technology with inter-satellite link. As in the newly built BeiDou system (BDS-3) equipped with Ka-band inter-satellite links, every individual satellite has the ability of communicating and measuring distances among each other. The system also has less dependence on the ground stations and improved navigation performance. Because of the huge amount of measurement data, centralized data processing algorithm for orbit determination is suggested to be replaced by a distributed one in which each satellite in the constellation is required to finish a partial computation task. In current paper, the balanced extended Kalman filter algorithm for distributed orbit determination is proposed and compared with whole-constellation centralized extended Kalman filter, iterative cascade extended Kalman filter, and increasing measurement covariance extended Kalman filter. The proposed method demands a lower computation power however yields results with a relatively good accuracy.

show abstract

“…As a great advantage of the new generation BDS, the contribution of the ISL in terms of POD was analyzed and confirmed by Ren et al (2017) with different data processing strategies. Taking the limited measurements of BDS-3 into consideration, Hu et al (2018) refined the cycle slip detection and repair strategy in their study to improve the usability of the observations as well as the precision of POD. Besides the frequency compatibility of the new signals, a better performance in terms of measurement noise and anti-multi-path property is also expected.…”

Section: Introductionmentioning

confidence: 99%

BDS-3 differential code bias estimation with undifferenced uncombined model based on triple-frequency observation

Wang

Zhao

et al. 2020

J Geod

View full text Add to dashboard Cite

Since 2015, the new generation global BDS system, i.e., BDS-3, has started its development with five experimental satellites demonstration system and has announced its initial global service officially on December 27, 2018. Among the various characteristics to be analyzed for the new generation BDS satellites, the differential code bias (DCB) is of special attention since that it has a direct dependence on the new signals, i.e., B1C and B2a, and it is one of the most intricacy problems in the ionosphere sensing and positioning with multi-GNSS and multi-frequency observations. To take the full capability of the triplefrequency BDS signals, this paper proposed a new method for the DCB estimation in which the undifferenced uncombined observations are processed in PPP mode. In addition, with the intention to estimate all the unknowns, including the DCB, in a single filter, the DESIGN (deterministic plus stochastic ionosphere model for GNSS) method is applied for the ionospheric delay constrains in this method. In the formula derivation, special attention is given to the DCB and clock parameters due to different frequencies for B1I/B1C, etc. Then, the efficiency of the new method is assessed with observations of 23 iGMAS stations capable for BDS triple-frequency tracking and 21 IGS stations capable for GPS triple-frequency tracking during DOY 001 to 090, 2019. Moreover, the traditional DCB estimation method by employing the geometry-free (GF) combination with the ionospheric delay removed by global ionosphere map product is also performed for comparison purpose. The experimental results suggest that by using the undifferenced uncombined solution, rather than the GF combination, the BDS-2 DCB on B1IB2I and B1CB3I can be improved, especially for the MEO satellites. Regarding to the DLR products, the undifferenced uncombined DCB solution presents a RMS of 0.32 ns and 0.27 ns for B1IB2I and B1CB3I, respectively. Concerning the BDS-3 satellites DCB, it is GF combination that performs better by a factor of 12.7% and 15.2% for B1CB2a and B1CB3I, respectively. This is mainly due to the fact that the undifferenced uncombined DCB solution is sensitive to the limited precision of the BDS-3 orbit and clock. This conclusion is further confirmed by the improvement in the GPS DCB solution with the new method. Compared with the GF combination solution, the STD for daily repeatability improves from 0.088 to 0.061 ns and 0.119 to 0.090 ns for satellite on C1WC2W and C1WC5X, respectively, by using the undifferenced uncombined model.

show abstract

New-Generation BeiDou (BDS-3) Experimental Satellite Precise Orbit Determination with an Improved Cycle-Slip Detection and Repair Algorithm

Cited by 22 publications

References 29 publications

A BDS-2/BDS-3 Integrated Method for Ultra-Rapid Orbit Determination with the Aid of Precise Satellite Clock Offsets

A BDS-2/BDS-3 Integrated Method for Ultra-Rapid Orbit Determination with the Aid of Precise Satellite Clock Offsets

Distributed Orbit Determination for Global Navigation Satellite System with Inter-Satellite Link

BDS-3 differential code bias estimation with undifferenced uncombined model based on triple-frequency observation

Contact Info

Product

Resources

About