Globalization highlight: orbit determination using BeiDou inter-satellite ranging measurements

Yang, Dingxin; Yang, Jun; Li, Gang; Zhou, Yifan; Tang, Chengpan

doi:10.1007/s10291-017-0626-5

Cited by 72 publications

(45 citation statements)

References 12 publications

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“…Existing methods for OD and TS with ISL data firstly derive the raw Ka-pseudorange observations from different times to some specified time epoch, and then the DCMs and the DEMs are formed to separate the orbit and clock information so that OD and TS are separated [17]. This idea has been first proposed by Ananda et al [8] and applied to OD and TS for BDS-3 satellites in the operational control center [2][3][4]6]. It may have advantages in stability and computational efficiency for on-board distributed autonomous OD and TS, but for routine OD and TS at the operational control center or for the centralized autonomous OD and TS, its shortcomings are obvious.…”

Section: Discussionmentioning

confidence: 99%

“…2 State Key Laboratory of Geo-information Engineering, Xi'an 710054, China. 3 Information Engineering University, Zhengzhou 450001, China. 4 China Xi'an Satellite Control Center, Xi'an 710043, China.…”

Section: Fundingmentioning

confidence: 99%

“…To enhance orbit determination (OD) and time synchronization (TS) under the condition of regional monitoring stations, the third-generation BeiDou Navigation Satellite System (BDS-3) employs inter-satellite link (ISL) technology which also enable autonomous navigation. The feasibility and performance of the ISL in BDS-3 have been verified with the in-orbit validation satellites [1][2][3][4][5][6][7]. Recent findings show that with the ISL ranging data, the radial orbit accuracy of 10 cm is achievable [2].…”

Section: Introductionmentioning

confidence: 96%

“…Instead, in a typical approach originally proposed for autonomous OD and TS [8], observations are derived at specified times, and then the derived clock measurement (DCM) and the derived ephemeris measurement (DEM) are formed to separate geometry information and clock information [8][9][10][11]. The DEMs are used for OD alone [2,[5][6][7][8][9][12][13][14] or together with other data such as the monitoring station data [3] and the inter-satellite orientation observations [15], while the DCMs are used for TS [4]. Therefore, OD and TS are performed independently.…”

Section: Introductionmentioning

confidence: 99%

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Orbit determination and time synchronization for BDS-3 satellites with raw inter-satellite link ranging observations

et al. 2020

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To provide competitive global positioning and timing services under the condition that monitoring stations are confined to Chinese territory, inter-satellite link (ISL) technology is used by the third-generation BeiDou Navigation Satellite System (BDS-3). The ISL, together with the dual one-way links between satellites and anchor stations, may enable autonomous navigation for BDS-3. In this paper, we propose a general observation model for orbit determination (OD) and time synchronization (TS) directly using non-simultaneous observations, such as raw ISL pseudoranges. With the proposed model, satellite orbits, clocks, and hardware delay biases of ISL equipment can be determined simultaneously by jointly processing inter-satellite one-way pseudorange data and observation data from ground monitoring stations. Moreover, autonomous OD and TS are also achievable with one-way pseudorange data from anchor stations and satellites. Data from eight BDS-3 satellites, two anchor stations, and seven monitoring stations located in China were collected to validate the proposed method. It is shown that by jointly processing data from the ISL and seven monitoring stations, the RMS of overlap orbit differences in radial direction is 0.019 m, the overlap clock difference (95%) is 0.185 ns, and the stability of the estimated hardware delay biases for each satellite is greater than 0.5 ns. Compared with the results obtained with the seven stations, the improvements of orbits in radial direction and clocks are 95.7% and 90.5%, respectively. When the hardware delay biases are fixed to predetermined values, the accuracies of orbits and clocks are further improved. By jointly processing pseudoranges from the satellites and the two anchor stations, the RMS of overlap orbit differences is 0.017 m in the radial direction, and the overlap clock difference (95%) is 0.037 ns. It has also been demonstrated that under the condition of one-way ranging links, the accuracies of orbits and clocks obtained by the above two modes are still significantly better than those obtained by using the data from the monitoring stations alone.

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Section: Discussionmentioning

confidence: 99%

Section: Fundingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Orbit determination and time synchronization for BDS-3 satellites with raw inter-satellite link ranging observations

et al. 2020

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“…The inter-satellite link technology does not only facilitate high accuracy precise orbit determination (POD), but also enables autonomous navigation as well as improves the independency and stability of BeiDou system [1]. The quality of BeiDou-3 signals is comparable to that of GPS L1/L2/L5 and Galileo…”

Section: Introductionmentioning

confidence: 99%

Solar Radiation Pressure Models for BeiDou-3 I2-S Satellite: Comparison and Augmentation

et al. 2018

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Abstract:As one of the most essential modeling aspects for precise orbit determination, solar radiation pressure (SRP) is the largest non-gravitational force acting on a navigation satellite. This study focuses on SRP modeling of the BeiDou-3 experimental satellite I2-S (PRN C32), for which an obvious modeling deficiency that is related to SRP was formerly identified. The satellite laser ranging (SLR) validation demonstrated that the orbit of BeiDou-3 I2-S determined with empirical 5-parameter Extended CODE (Center for Orbit Determination in Europe) Orbit Model (ECOM1) has the sun elongation angle (ε angle) dependent systematic error, as well as a bias of approximately −16.9 cm. Similar performance has been identified for European Galileo and Japanese QZSS Michibiki satellite as well, and can be reduced with the extended ECOM model (ECOM2), or by using the a priori SRP model to augment ECOM1. In this study, the performances of the widely used SRP models for GNSS (Global Navigation Satellite System) satellites, i.e., ECOM1, ECOM2, and adjustable box-wing model have been compared and analyzed for BeiDou-3 I2-S satellite. In addition, the a priori SRP models are derived based on analytical cuboid box model and empirically spectra analysis, respectively. Use of the a priori model combined with ECOM1 was finally demonstrated to reduce the ε-angle-dependent systematic error, and thus improved the radial orbit accuracy by nearly 35 per cent when compared to the solution with standalone ECOM1, as revealed by the one way SLR residuals.

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The contribution of intersatellite links to BDS ‐3 orbit determination: Model refinement and comparisons

et al. 2019

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By end-2018, the Chinese BeiDou satellite system (BDS) has entered its third phase of global scale coverage (BDS-3). This study presents and validates a modified modeling aspect concerning an intersatellite link (ISL) hardware delay estimation. The precise orbit determination (POD) results of BDS-3 demonstrate this aspect along with calibrated phase center offsets (PCOs) of the ISL terminal to help improve the orbit accuracy. After onboarding the ISL data, two additional sets of POD solutions using regional and global ground stations are conducted. About a 40% improvement can be achieved for regional cases and 20% for global cases after ISL data were used for POD. The best POD performance solution is obtained with observations from both the global ground stations and ISL when the averaged 3D root mean squares of the orbit overlapping differences can reach around 20 cm and the signalin-space range errors (SISREs) obtained by 6-hour predicted clock and orbit solutions show an average value of 25 cm.

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Globalization highlight: orbit determination using BeiDou inter-satellite ranging measurements

Cited by 72 publications

References 12 publications

Orbit determination and time synchronization for BDS-3 satellites with raw inter-satellite link ranging observations

Orbit determination and time synchronization for BDS-3 satellites with raw inter-satellite link ranging observations

Solar Radiation Pressure Models for BeiDou-3 I2-S Satellite: Comparison and Augmentation

The contribution of intersatellite links to BDS ‐3 orbit determination: Model refinement and comparisons

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