Skip to main content
Log in

Method for evaluating real-time GNSS satellite clock offset products

  • Review Article
  • Published:
GPS Solutions Aims and scope Submit manuscript

Abstract

Real-time satellite clock offset products are frequently utilized in navigation and positioning service fields. The precision of such products is a key issue for their application. The evaluation methods existed for satellite clock offset products are mostly based on post-processed satellite clock offset solutions, which will encounter problems in real-time product evaluation, especially for real-time satellite clock offset products estimated from data with regional stations only. We propose an improved evaluation method for global navigation satellite system (GNSS) satellite clock offset products. In the proposed method, we use all-satellite reference method instead of single-satellite reference method to eliminate the timescale in satellite clock offset products. Moreover, a preprocessing step is suggested to detect gross errors and initial clock bias before evaluating the precision of the satellite clock offsets. We conduct two examples to verify our method, and the experimental results show that the proposed method is more reasonable in assessing the GNSS satellite clock offset precision, and it also provides a reliable approach to analyzing the estimated satellite clock offset in both real-time and post-processed, or globally and regionally.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7

Similar content being viewed by others

References

  • Bock H, Jäggi A, Švehla D, Beutler G, Hugentobler U, Visser P (2007) Precise orbit determination for the GOCE satellite using GPS. Adv Space Res 39(10):1638–1647

    Article  Google Scholar 

  • Bock H, Dach R, Jäggi A, Beutler G (2009) High-rate GPS clock corrections from CODE: support of 1 Hz applications. J Geodesy 83(11):1083

    Article  Google Scholar 

  • Chen JP, Zhang YZ, Zhou XH, Pei X, Wang JX (2013) GNSS clock corrections densification at SHAO: from 5 min to 30 s. Sci China Phys Mech Astron 57(1):166–175

    Article  Google Scholar 

  • Chen L, Song W, Yi W, Shi C, Lou Y, Guo H (2016) Research on a method of real-time combination of precise GPS clock corrections. GPS Solut. doi:10.1007/s10291-016-0515-3

    Google Scholar 

  • Douša J (2010) The impact of errors in predicted GPS orbits on zenith troposphere delay estimation. GPS Solut 14(3):229–239

    Article  Google Scholar 

  • Dousa J, Vaclavovic P (2014) Real-time zenith tropospheric delays in support of numerical weather prediction applications. Adv Space Res 53(9):1347–1358

    Article  Google Scholar 

  • Ge M, Calais E, Haase J (2002) Sensitivity of zenith total delay accuracy to GPS orbit errors and implications for near-real-time GPS meteorology. J Geophys Res 107(D16):4315. doi:10.1029/2001JD001095

    Article  Google Scholar 

  • Ge M, Chen J, Gendt G (2009) EPOS-RT: software for real-time GNSS data processing. In: Geophysical research abstracts, vol 11. EGU2009-8933, EGU General Assembly 2009, Vienna

  • Ge M, Chen J, Douša J, Gendt G, Wickert J (2012) A computationally efficient approach for estimating high-rate satellite clock offset corrections in realtime. GPS Solut 16(1):9–17

    Article  Google Scholar 

  • Hadas T, Bosy J (2015) IGS RTS precise orbits and clocks verification and quality degradation over time. GPS Solut 19(1):93–105

    Article  Google Scholar 

  • Han S, Kwon JH, Jekeli C (2001) Accurate absolute GPS positioning through satellite clock offset error estimation. J Geodesy 75(1):33–43

    Article  Google Scholar 

  • Lichten SM, Border JS (1987) Strategies for high-precision global positioning system orbit determination. J Geophys Res Solid Earth 92(B12):12751–12762

    Article  Google Scholar 

  • Lou Y, Shi C, Zhou X, Ye S (2009) Realization and analysis Of GPS precise clock products. Geomat Inf Sci Wuhan Univ 34(1):88–91

    Google Scholar 

  • Mervart L, Weber G (2011) Real-time combination of GNSS orbit and clock correction streams using a Kalman filter approach. In: Proceedings of ION GNSS 2011, Institute of Navigation, Portland, OR, USA, 20–23 Sep, pp 707–711

  • Mervart L, Lukes Z, Rocken C, Iwabuchi T (2008) Precise point positioning with ambiguity resolution in real-time. In: Proceedings of ION GNSS 2008, Savannah, GA, 16–19 Sep, pp 397–405

  • Pan S, Chen W, Jin X, Shi X, He F (2015) Real-time PPP based on the coupling estimation of clock bias and orbit error with broadcast ephemeris. Sensors 15(7):17808–17826

    Article  Google Scholar 

  • Shi J, Xu C, Li Y, Gao Y (2015) Impacts of real-time satellite clock offset errors on GPS precise point positioning-based troposphere zenith delay estimation. J Geodesy 89(8):747–756

    Article  Google Scholar 

  • Shi J, Yuan X, Cai Y, Wang G (2016) GPS real-time precise point positioning for aerial triangulation. GPS Solut. doi:10.1007/s10291-016-0532-2

    Google Scholar 

  • Song W, Yi W, Lou Y, Shi C, Yao Y, Liu Y, Mao Y, Xiang Y (2014) Impact of GLONASS pseudorange inter-channel biases on satellite clock offset corrections. GPS Solut 18(3):323–333

    Article  Google Scholar 

  • Wright TJ, Houlie N, Hildyard M, Iwabuchi T (2012) Real-time, reliable magnitudes for large earthquakes from 1 Hz GPS precise point positioning: the 2011 Tohoku-Oki (Japan) earthquake. Geophys Res Lett 39:L12302. doi:10.1029/2012GL051894

    Article  Google Scholar 

  • Yang Y (1999) Robust estimation of geodetic datum transformation. J Geodesy 73(5):268–274

    Article  Google Scholar 

  • Yuan Y, Zhang K, Rohm W, Choy S, Norman R, Wang CS (2014) Real-time retrieval of precipitable water vapor from GPS precise point positioning. J Geophys Res Atmos 119(16):10044–10057

    Article  Google Scholar 

  • Zhang Q, Moore P, Hanley J, Martin S (2007) Auto-BAHN: software for near real-time GPS orbit and clock computations. Adv Space Res 39(10):1531–1538

    Article  Google Scholar 

  • Zhang X, Li X, Guo F (2011) Satellite clock offset estimation at 1 Hz for realtime kinematic PPP applications. GPS Solut 15(4):315–324

    Article  Google Scholar 

Download references

Acknowledgements

We are grateful to anonymous reviewers for their valuable comments and suggestions. The IGS is recognized for providing the post-processed clock products and also appreciate the National Administration of Surveying, Mapping and Geoinformation providing the real-time clock in China region. This study was supported by State Key Research and Development Program (2016YFB0501802) and by National Natural Science Foundation of China (Nos 41231174, 41574028 and 41404010) and by Open Research Fund of State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (Grant No.15P01).

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Wenting Yi.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Yao, Y., He, Y., Yi, W. et al. Method for evaluating real-time GNSS satellite clock offset products. GPS Solut 21, 1417–1425 (2017). https://doi.org/10.1007/s10291-017-0619-4

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10291-017-0619-4

Keywords

Navigation