The non-nominal troposphere induced by climate extremes poses a threat to the precision approach and landing of the civil aircraft in ground-based augmentation system (GBAS). However, there is currently no effective non-nominal troposphere monitoring method at both GBAS stations and aircrafts, which increases the integrity risk. This study proposes a novel approach for simultaneously modelling and monitoring ground station and aircraft non-nominal troposphere using precision point positioning (PPP) technology based on a regional reference network. The global navigation satellite system (GNSS) and meteorological data from the Hong Kong satellite positioning reference station network and numerical weather models from the European centre for medium-range weather forecasts are processed in all the year of 2017. A tropospheric correction (TC) model is used to correct station height-induced biases in zenith total delay (ZTD) obtained from PPP. By comparing the performance of 6 typical spatial interpolation algorithms in tropospheric delay interpolating, the universal Kriging algorithm is found to be the most suitable one which achieves a minimum mean absolute error (MAE) of 8.24 mm. The non-nominal troposphere is monitored using the constructed corrected ZTD map using universal Kriging method. A non-nominal troposphere up to 50 mm is observed, which can affect the integrity of the air navigation. Furthermore, the relationship between non-nominal troposphere and the rainfall is investigated. The study integrates widely distributed GNSS and meteorological data into a seamless non-nominal tropospheric monitoring service, enhancing the integrity of GBAS in air transportation.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Regional Reference Network Enhanced Tropospheric Modeling and Non-Nominal Troposphere Monitoring for GBAS in Air Transportation


    Contributors:
    Tang, Honglin (author) / Wang, Zhipeng (author) / Zhu, Yanbo (author) / Guo, Kai (author) / Wang, Yiming (author)


    Publication date :

    2025-07-01


    Size :

    5097238 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Impact of non-nominal troposphere error on GBAS integrity

    Xin, Pumin / Wang, Zhipeng | British Library Online Contents | 2017


    Non-Nominal Troposphere Reassessment for Meeting CAT II/III with MC/MF GBAS

    Guilbert, Alizé | British Library Conference Proceedings | 2015


    Nominal Performance of Future Dual Frequency Dual Constellation GBAS

    Daniel Gerbeth / Mihaela-Simona Circiu / Maria Caamano et al. | DOAJ | 2016

    Free access

    Fault Modeling for GBAS Airworthiness Assessments

    Murphy, T. / Harris, M. / Shively, C. et al. | British Library Online Contents | 2012


    Assessment of Single-difference Ionospheric Residuals in a Regional Network for GBAS

    Wang, K. / Meindl, M. / Geiger, A. et al. | Tema Archive | 2014