Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-26T01:24:36.928Z Has data issue: false hasContentIssue false
  • English
  • Français

A New Method of Real-Time Kinematic Positioning Suitable for Baselines of Different Lengths

Published online by Cambridge University Press:  11 August 2020

Jinhai Liu ,
Rui Tu Open the ORCID record for Rui Tu [Opens in a new window] ,
Rui Zhang ,
Xiaodong Huang ,
Pengfei Zhang  and
Xiaochun Lu
Jinhai Liu
Affiliation:
(National Time Service Center, Chinese Academy of Sciences, Xi'an, China) (University of Chinese Academy of Sciences, Beijing, China)
Rui Tu*
Affiliation:
(National Time Service Center, Chinese Academy of Sciences, Xi'an, China) (University of Chinese Academy of Sciences, Beijing, China) (Key Laboratory of Time and Frequency Primary Standards, Chinese Academy of Sciences, Xi'an, China)
Rui Zhang
Affiliation:
(National Time Service Center, Chinese Academy of Sciences, Xi'an, China) (Key Laboratory of Time and Frequency Primary Standards, Chinese Academy of Sciences, Xi'an, China)
Xiaodong Huang
Affiliation:
(National Time Service Center, Chinese Academy of Sciences, Xi'an, China) (University of Chinese Academy of Sciences, Beijing, China)
Pengfei Zhang
Affiliation:
(National Time Service Center, Chinese Academy of Sciences, Xi'an, China) (University of Chinese Academy of Sciences, Beijing, China)
Xiaochun Lu
Affiliation:
(National Time Service Center, Chinese Academy of Sciences, Xi'an, China) (University of Chinese Academy of Sciences, Beijing, China) (Key Laboratory of Time and Frequency Primary Standards, Chinese Academy of Sciences, Xi'an, China)
*
(E-mail: [email protected])
Get access Rights & Permissions [Opens in a new window]

Abstract

This study introduces a new real-time kinematic (RTK) positioning method which is suitable for baselines of different lengths. The method merges carrier-phase wide-lane, and ionosphere-free observation combinations (LWLC) instead of using pseudo-range, and carrier-phase ionosphere-free combination (PCLC), or single-frequency pseudo-range and phase combination (P1L1). In a first step, the double-differenced wide-lane ambiguities were calculated and fixed using the pseudo-range and carrier-phase wide-lane combination observations. Once the double-differenced wide-lane integer ambiguities were known, the wide-lane combined observations were regarded as accurate pseudo-range observations. Subsequently, the carrier-phase wide-lane, and ionosphere-free combined observations were used to fix the double-differenced carrier-phase integer ambiguities, achieving the final RTK positioning. The RTK positioning analysis was performed for short, medium, and long baselines, using the P1L1, PCLC, and LWLC methods, respectively. For a short baseline, the LWLC method demonstrated positioning accuracy similar to the P1L1 method, and performed better than the PCLC method. For medium and long baselines, the positioning accuracy of the LWLC method was slightly higher than those of the PCLC and P1L1 methods. In conclusion, the LWLC method provided high-precision RTK positioning results for baselines with different lengths, as it used high-precision carrier-phase observations with fixed ambiguities instead of low-precision pseudo-range observations.

Keywords

Global Navigation Satellite SystemReal-Time KinematicBaselineAmbiguity ResolutionAccuracyReliability
Type
Research Article
Information
The Journal of Navigation , Volume 74 , Issue 1 , January 2021 , pp. 143 - 155
Check for updates
Copyright
Copyright © The Royal Institute of Navigation 2020

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Brack, A. (2017). Long Baseline GPS + BDS RTK Positioning with Partial Ambiguity Resolution. Proceedings of the 2017 International Technical Meeting of The Institute of Navigation, Monterey, California, January 2017, pp. 754–762.CrossRefGoogle Scholar
Dai, L., Eslinger, D. and Sharpe, T. (2007). Innovative Algorithms to Improve Long Range RTK Reliability and Availability. Proceedings of the National Technical Meeting of the Institute of Navigation NTM, Vol. 6682(1), pp. 860–872.Google Scholar
Gao, C., Zhao, Y. and Wan, D. (2005). The weight determination of the double difference observation in GPS carrier phase positioning. Science of Surveying and Mapping, 30(3), 28–32.Google Scholar
Gao, W., Gao, C., Pan, S., Meng, X. and Xia, Y. (2017). Inter-system differencing between GPS and BDS for medium-baseline RTK positioning. Remote Sensing, 9(9), 948–964. doi:10.3390/rs9090948CrossRefGoogle Scholar
He, H., Li, J., Yang, Y., Xu, J., Guo, H. and Wang, A. (2014). Performance assessment of single- and dual-frequency BeiDou/GPS single-epoch kinematic positioning. GPS Solutions, 18(3), 393–403. doi:10.1007/s10291-013-0339-3CrossRefGoogle Scholar
He, X., Zhang, X., Tang, L. and Liu, W. (2016). Instantaneous real-time kinematic decimeter-level positioning with BeiDou triple-frequency signals over medium baselines. Sensors, 16(1), 1. doi:10.3390/s16010001CrossRefGoogle ScholarPubMed
Li, G., Wu, J., Zhao, C. and Tian, Y. (2017). Double differencing within GNSS constellations. GPS Solutions, 21(3), 1161–1177. doi:10.1007/s10291-017-0599-4CrossRefGoogle Scholar
Odolinski, R., Teunissen, P. J. G. and Odijk, D. (2015a). Combined BDS, Galileo, QZSS and GPS single-frequency RTK. GPS Solutions, 19(1), 151–163. doi:10.1007/s10291-014-0376-6CrossRefGoogle Scholar
Odolinski, R., Teunissen, P. J. G. and Odijk, D. (2015b). Combined GPS + BDS for short to long baseline RTK positioning. Measurement Science and Technology, 26(4), 045801. doi:10.1088/0957-0233/26/4/045801CrossRefGoogle Scholar
Paziewski, J. and Sieradzki, R. (2017). Integrated GPS + BDS instantaneous medium baseline RTK positioning: signal analysis, methodology and performance assessment. Advances in Space Research, 60(12), 2561–2573. doi:10.1016/j.asr.2017.04.016CrossRefGoogle Scholar
Tang, W., Jin, L. and Xu, K. (2014). Performance analysis of ionosphere monitoring with BeiDou CORS observational data. Journal of Navigation, 67(1), 511–522. doi:10.1017/S0373463313000854CrossRefGoogle Scholar
Teunissen, P. J. G. (1995). The least-squares ambiguity decorrelation adjustment: a method for fast GPS integer ambiguity estimation. Journal of Geodesy, 70(1), 65–82. doi:10.1007/BF00863419CrossRefGoogle Scholar
Teunissen, P. J. G. and Verhagen, S. (2009). The GNSS ambiguity ratio-test revisited: a better way of using it. Survey Review, 41(312), 138–151. doi:10.1179/003962609X390058CrossRefGoogle Scholar
Tu, R., Liu, J., Zhang, R., Zhang, P. and Lu, X. (2018). A model for combined GPS and BDS real-time kinematic positioning using one common reference ambiguity. Journal of Navigation, 71(4), 1011–1024. doi:10.1017/S0373463318000061CrossRefGoogle Scholar
Tu, R., Lu, C., Zhang, P., Zhang, R., Liu, J. and Lu, X. (2019). The study of BDS RTK algorithm based on zero-combined observations and ionosphere constraints. Advances in Space Research, 63(9), 2687–2695. doi:10.1016/j.asr.2017.07.023CrossRefGoogle Scholar