Abstract
Since 2020, the BeiDou Navigation Satellite System (BDS) has launched new precise point positioning service which provides precise correction of GPS and BDS-3 satellites to help users realize real-time precise point positioning, known as PPP-B2b service. After being fully operational for more than one year, this contribution comprehensively analyzes the performance of PPP-B2b in terms of correction availability, clock and orbit quality and positioning accuracy with PPP-B2b messages of nearly 48 weeks from 2021 to 2022. The results show that in the PPP-B2b service, the orbit radial differences of BDS-3 MEO, GPS, and BDS-3 IGSO satellites are 0.056 m, 0.069 m, and 0.172 m, respectively, compared to the GFZ final orbit, while the difference of along-track and cross-track is more than three times the radial. For BDS-3 MEO satellites from different manufacturers, the RMS of Satellite Laser Ranging (SLR) residuals is different, with a maximum of 0.11 m. Restricted by the regional tracking network, the correction series of PPP-B2b service are discontinuous, and there are constant satellite-specific clock biases in different arcs of the satellite. Thus, the STD and RMS of satellite clock offset and signal-in-space ranging error (SISRE) are calculated using the method of weighting by arcs. The STD of SISRE for BDS-3 MEO, GPS and BDS-3 IGSO are 0.059 m, 0.092 m and 0.174 m, respectively. A total of 108 days of observation data from 12 MGEX stations of the East Asia region are selected to analyze the positioning performance of PPP-B2b. The results of day-by-day static PPP are stable at the centimeter level, while the average convergence time of GPS-only (61.65 min) is longer than BDS-3-only (45.12 min), which the constant bias in clock offset may cause. To analyze the effect of this bias, the bias is calculated and used as a correction to the PPP-B2b clocks. The convergence time of BDS-3 and GPS positioning is reduced by 48.7% and 65.9%, respectively, after correcting this bias, which confirms the influence of clock constant bias on positioning convergence.
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Data availability
The BDS-3 CNAV1 broadcast ephemeris files are downloaded from the website of Test and Assessment Research Center of China Satellite Navigation Office (ftp://ftp2.csno-tarc.cn/cnav). And the LNAV ephemeris for GPS and the GFZ final product are downloaded from the Wuhan University Data Centre of IGS (ftp://igs.gnsswhu.cn/). All the MGEX observation data can be accessed from ftp://igs.gnsswhu.cn//pub/gps/data/daily/.
References
Borio, D., T. Senni and I. Fernandez-Hernandez (2020). Experimental Analysis of a Candidate Galileo E6-B Data Dissemination Scheme.In: Proceedings of ION ITM 2020, Institute of Navigation, San Diego, California, Jan 21–24, pp 509–520.
Chen G, Wei N, Li M, Zhao Q, Zhang J (2022) BDS-3 and GPS/Galileo integrated PPP using broadcast ephemerides. GPS Solut. https://doi.org/10.1007/s10291-022-01311-6
CSNO (2020). BeiDou Navigation Satellite System Signal In Space Interface Control Document Precise Point Positioning Service Signal PPP-B2b (Version 1.0). http://www.beidou.gov.cn/xt/gfxz/202008/P020200803362062482940.pdf
CSNO (2021) BeiDou Navigation Satellite System Open Service Performance Standard (Version 3.0). http://www.beidou.gov.cn/xt/gfxz/202105/P020210526216231136238.pdf
Dai et al., 2016 Dai L, Chen Y, Lie A, Zeitzew M, Yuki Z (2016) StarFire™ SF3: worldwide centimeter-accurate real time GNSS positioning. In: Proceedings of ION GNSS 2016, Institute of Navigation, Portland, Oregon, USA, Sept 12–16, pp 3295–3320
Gong X, Lou Y, Zheng F, Gu S, Shi C, Liu J, Jing G (2018) Evaluation and calibration of BeiDou receiver-related pseudorange biases. GPS Solut 22(4):98. https://doi.org/10.1007/s10291-018-0765-3
Guo W, Zuo H, Mao F, Chen J, Gong X, Gu S, Liu J (2022) On the satellite clock datum stability of RT-PPP product and its application in one-way timing and time synchronization. J Geod. https://doi.org/10.1007/s00190-022-01638-5
Hadas T, Bosy J (2014) IGS RTS precise orbits and clocks verification and quality degradation over time. GPS Solut 19(1):93–105. https://doi.org/10.1007/s10291-014-0369-5
Hadas T, Kazmierski K, Sośnica K (2019) Performance of Galileo-only dual-frequency absolute positioning using the fully serviceable Galileo constellation. GPS Solut. https://doi.org/10.1007/s10291-019-0900-9
Kazmierski K, Zajdel R, Sośnica K (2020) Evolution of orbit and clock quality for real-time multi-GNSS solutions. GPS Solut. https://doi.org/10.1007/s10291-020-01026-6
Leandro R et al (2011) RTX positioning: the next generation of cm-accurate real-time GNSS positioning. In: Proceedings of ION GNSS 2011, Institute of Navigation, Portland, Oregon, USA, Sept 20–23
Liu C et al (2020) Design and implementation of a BDS precise point positioning service. Navigation 67(4):875–891. https://doi.org/10.1002/navi.392
Liu Y, Yang C, Zhang M (2022) Comprehensive analyses of PPP-B2b performance in China and surrounding areas. Remote Sens. https://doi.org/10.3390/rs14030643
Lu X, Chen L, Shen N, Wang L, Jiao Z, Chen R (2021) Decoding PPP corrections from BDS B2b signals using a software-defined receiver: an initial performance evaluation. IEEE Sens J 21(6):7871–7883. https://doi.org/10.1109/jsen.2020.3041486
Malys S, Jensen PA (1990) Geodetic point positioning with gps carrier beat phase data from the CASA UNO experiment. Geophys Res Lett 17(5):651–654
Montenbruck O, Steigenberger P, Hauschild A (2014) Broadcast versus precise ephemerides: a multi-GNSS perspective. GPS Solut 19(2):321–333. https://doi.org/10.1007/s10291-014-0390-8
Montenbruck O, Steigenberger P, Hauschild A (2018) Multi-GNSS signal-in-space range error assessment—Methodology and results. Adv Space Res 61(12):3020–3038. https://doi.org/10.1016/j.asr.2018.03.041
Montenbruck O et al (2017) The multi-GNSS experiment (MGEX) of the international GNSS Service (IGS)—achievements, prospects and challenges. Adv Space Res 59(7):1671–1697. https://doi.org/10.1016/j.asr.2017.01.011
Nie Z, Liu F, Gao Y (2019) Real-time precise point positioning with a low-cost dual-frequency GNSS device. GPS Solut. https://doi.org/10.1007/s10291-019-0922-3
Nie Z, Wang B, Wang Z, He K (2020) An offshore real-time precise point positioning technique based on a single set of BeiDou short-message communication devices. J Geod. https://doi.org/10.1007/s00190-020-01411-6
Ren Z, Gong H, Peng J, Tang C, Huang X, Sun G (2021) Performance assessment of real-time precise point positioning using BDS PPP-B2b service signal. Adv Space Res 68(8):3242–3254. https://doi.org/10.1016/j.asr.2021.06.006
Sośnica K, Zajdel R, Bury G, Bosy J, Moore M, Masoumi S (2020) Quality assessment of experimental IGS multi-GNSS combined orbits. GPS Solut. https://doi.org/10.1007/s10291-020-0965-5
Tang C, Hu X, Chen J, Liu L, Zhou S, Guo R, Li X, He F, Liu J, Yang J (2022) Orbit determination, clock estimation and performance evaluation of BDS-3 PPP-B2b service. J Geod. https://doi.org/10.1007/s00190-022-01642-9
Tang C et al (2018) Initial results of centralized autonomous orbit determination of the new-generation BDS satellites with inter-satellite link measurements. J Geod 92(10):1155–1169. https://doi.org/10.1007/s00190-018-1113-7
Tao J, Liu J, Hu Z, Zhao Q, Chen G, Ju B (2021) Initial Assessment of the BDS-3 PPP-B2b RTS compared with the CNES RTS. GPS Solut 25(4):131. https://doi.org/10.1007/s10291-021-01168-1
Xu Y, Yang Y, Li J (2021) Performance evaluation of BDS-3 PPP-B2b precise point positioning service. GPS Solut 25(4):142. https://doi.org/10.1007/s10291-021-01175-2
Yao Y, He Y, Yi W, Song W, Cao C, Chen M (2017) Method for evaluating real-time GNSS satellite clock offset products. GPS Solut 21(4):1417–1425. https://doi.org/10.1007/s10291-017-0619-4
Zajdel R, Steigenberger P, Montenbruck O (2022) On the potential contribution of BeiDou-3 to the realization of the terrestrial reference frame scale. GPS Solut. https://doi.org/10.1007/s10291-022-01298-0
Zhang L, Yang H, Gao Y, Yao Y, Xu C (2018) Evaluation and analysis of real-time precise orbits and clocks products from different IGS analysis centers. Adv Space Res 61(12):2942–2954. https://doi.org/10.1016/j.asr.2018.03.029
Zhang W, Lou Y, Song W, Sun W, Zou X, Gong X (2022) Initial assessment of BDS-3 precise point positioning service on GEO B2b signal. Adv Space Res 69(1):690–700. https://doi.org/10.1016/j.asr.2021.09.006
Zhang Y, Kubo N, Chen J, Wang A (2021) Calibration and analysis of BDS receiver-dependent code biases. J Geod 95(4):43. https://doi.org/10.1007/s00190-021-01497-6
Zumberge JF, Heflin MB, Jefferson DC, Watkins MM, Webb FH (1997) Precise point positioning for the efficient and robust analysis of GPS data from large networks. J Geophys Res Solid Earth 102(B3):5005–5017. https://doi.org/10.1029/96jb03860
Acknowledgements
The authors thank MGEX for offering observation data, precise satellite orbit and clock, and ILRS for providing SLR data.
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Author S.S and M.W designed the research; X.M provided the software; S.S and R.J analyzed the result; S.S, M.W and C.L wrote the main manuscript text; All authors reviewed the manuscript.
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Sun, S., Wang, M., Liu, C. et al. Long-term performance analysis of BDS-3 precise point positioning (PPP-B2b) service. GPS Solut 27, 69 (2023). https://doi.org/10.1007/s10291-023-01409-5
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DOI: https://doi.org/10.1007/s10291-023-01409-5