BeiDou-3 broadcast clock estimation by integration of observations of regional tracking stations and inter-satellite links

Yang, Yufei; Yang, Yuanxi; Hu, Xiaogong; Tang, Chengpan; Guo, Rui; Zhou, Zhanshi; Xu, Jin; Pan, Junyang; Su, Mudan

doi:10.1007/s10291-020-01067-x

Cited by 38 publications

(10 citation statements)

References 21 publications

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“…Quartz crystal and atomic frequency standards are common clock frequency standards. Three practical atomic frequency standards provide enough accuracy for spatial applications: rubidium, cesium, and hydrogen [ 29 ]. Therefore, in the full digital simulation around the frequency of rubidium, cesium, and hydrogen atoms, assuming that the uplink/downlink of the ground station in the system are all S-bands, the parameter setting is shown in Table 4 .…”

Section: Resultsmentioning

confidence: 99%

Evaluation methods of BDS-3 ground-segment defensive capability oriented to satellite navigation countermeasures

Wang,

Sun,

Wang

et al. 2024

Heliyon

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Section: Resultsmentioning

confidence: 99%

Evaluation methods of BDS-3 ground-segment defensive capability oriented to satellite navigation countermeasures

Wang,

Sun,

Wang

et al. 2024

Heliyon

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“…To evaluate the influence of deterministic random parts of clock frequency reference on radio velocity measurement accuracy, predecessors proposed an index of Doppler velocity measurement error of ground stations [27]. Compared with the model derivation carried out under the secure situation of the above evaluation, aiming at these difference points that ground segment suffers different damage situations during countering and the tracking target becomes satellites, we improved the existing indices and propose the following index Ability(δspeed) to evaluate the ground-segment defensive capability.…”

Section: ) Tracking Ability Of Ground Stationsmentioning

confidence: 99%

Defensive Performance Evaluation Methods of the GNSS for Satellite Navigation Countermeasures

Wang,

Sun,

Wang

2024

IEEE Access

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This study presents a comprehensive performance evaluation system of the global navigation satellite system (GNSS) oriented to satellite navigation countermeasures, including evaluation model, detection method, and overall evaluation method. The obtained results can further meet the needs of manufacturers to improve critical defensive performance in production and design, and meet the demands of decision-makers to achieve optimal decision-making by expanding the GNSS defensive benefits in the antagonistic process. Taking GNSS as the evaluation object, a performance index system is established around the composition of GNSS and its performance evaluation principles, which solves the one-sidedness and imperfection of the existing index systems. Then, around the user-, space-, and ground-segment defensive capabilities, their evaluation models of performance indices corresponding to each capability and their detection methods, as well as an overall evaluation method, are proposed to realize the performance evaluation and quantitative analysis. Finally, the influence law of each performance evaluation result on the corresponding capability under different damage situations is analyzed by case-based simulation and actual measurement. Therefore, the GNSS defensive performance can be improved by decreasing the jamming-to-signal ratio threshold received by the user, jamming success rate, SISRE, and UERE, try to decrease the difference between the results (PDOP availability and spatial signal continuity) in a secure situation and those in one damage situation, and increasing the tracking ability of ground stations and their communication anti-jamming ability. The obtained results would be used to complete action plan determination and comprehensive evaluation verification, and further select the optimal strategy and maximize the defensive benefit for the GNSS during countering.

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“…The broadcast ephemeris clock offset accuracy of the BDS-3 satellites is about 1 ns apart from the C38, C39, and C40 satellites, the operation period of these three satellites is shorter, and the stations can receive the signal of these three satellites are few. In a word, the mean accuracy is 1.04 ns, its accuracy is improved compared to that of BDS-2 satellites, which can be attributed to the following reasons: Firstly, the improved rubidium atomic clocks and highperformance Passive Hydrogen Masers (PHM) are equipped on BDS-3 satellites, the frequency stability is extremely improved compared to BDS-2 satellites; secondly, since the Inter-Satellite Link (ISL) technology is employed to estimate BDS-3 broadcast ephemeris clock offset [24], the broadcast ephemeris clock offset accuracy can be significantly improved.…”

Section: Broadcast Ephemeris Clock Offset Performancementioning

confidence: 99%

Performance of Multi-GNSS in the Asia-Pacific Region: Signal Quality, Broadcast Ephemeris and Precise Point Positioning (PPP)

Huang

Wang

et al. 2022

Remote Sensing

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Since BeiDou Navigation Satellite System (BDS) and Japan’s Quasi-Zenith Satellite System (QZSS) have more visible satellites in the Asia-Pacific region, and navigation satellites of Global Positioning System (GPS), Galileo satellite navigation system (Galileo), and GLONASS satellite navigation system (GLONASS) are uniformly distributed globally, the service level of multi-mode Global Navigation Satellite System (GNSS) in the Asia-Pacific region should represent the best service capability. Based on the observation data of 10 Multi-GNSS Experiment (MGEX) stations, broadcast ephemeris and precision ephemeris from 13 to 19 October 2021, this paper comprehensively evaluated the service capability of multi-GNSS in the Asia-Pacific region from three aspects of observation data quality, broadcast ephemeris performance, and precision positioning level. The results show that: (1) the carrier-to-noise-density ratio (C/N0) quality of the GPS and Galileo is the best, followed by BDS and GLONASS, and QZSS is the worst. GPS, BDS-2, GLONASS, and QZSS pseudorange multipath values range from 0 to 0.6 m, while Galileo system and BDS-3 pseudorange multipath values range from 0 to 0.8 m. (2) In terms of broadcast ephemeris accuracy, BDS-3 broadcast ephemeris has the best orbit, and the three-dimensional (3D) Root Mean Square (RMS) is 0.21 m; BDS-2 was the worst, with a 3D RMS of 1.99 m. The broadcast ephemeris orbits of GPS, Galileo, QZSS, and GLONASS have 3D RMS of 0.60 m, 0.62 m, 0.83 m, and 1.27 m, respectively. For broadcast ephemeris clock offset: Galileo has the best performance, 0.61 ns, GLONASS is the worst, standard deviation (STD) is 3.10 ns, GPS, QZSS, BDS-3 and BDS-2 are 0.65 ns, 0.75 ns, and 1.72 ns, respectively. For signal-in-space ranging errors (SISRE), the SISRE results of GPS and Galileo systems are the best, fluctuating in the range of 0 m–2 m, followed by QZSS, BDS-3, Galileo, and BDS-2. (3) GPS, BDS, GLONASS, Galileo, GPS/QZSS, and BDS/QZSS were used for positioning experiments. In static PPP, the convergence time and positioning accuracy of GPS show the best performance. The positioning accuracy of GPS/QZSS and BDS/QZSS is improved compared with that of GPS and BDS. In terms of kinematic PPP, the convergence time and positioning accuracy of GPS/QZSS and BDS/QZSS are improved compared with that of GPS and BDS. In addition to GLONASS and Galileo systems, the other combinations outperformed 3 cm, 3 cm, and 5 cm in the east, north, and up directions.

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BeiDou-3 broadcast clock estimation by integration of observations of regional tracking stations and inter-satellite links

Cited by 38 publications

References 21 publications

Evaluation methods of BDS-3 ground-segment defensive capability oriented to satellite navigation countermeasures

Evaluation methods of BDS-3 ground-segment defensive capability oriented to satellite navigation countermeasures

Defensive Performance Evaluation Methods of the GNSS for Satellite Navigation Countermeasures

Performance of Multi-GNSS in the Asia-Pacific Region: Signal Quality, Broadcast Ephemeris and Precise Point Positioning (PPP)

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