The Brazil ionospheric study project aims to develop a new ground‐based augmentation system (GBAS) ionospheric threat model to better reflect Brazil's low‐latitude conditions. Data processing from the global navigation satellite system for 123 active ionospheric days identified 1017 anomalous ionospheric gradients caused by nighttime equatorial plasma bubbles (EPBs). A significant number of gradients, including the largest verified gradient of 850.7 mm/km, exceed the upper bound (375–425 mm/km) of the conterminous United States (CONUS) threat model. This paper defines a series of parameters to model the geometry of EPBs. A maximum ionospheric delay drop of 35 m and a transition zone between 20 and 450 km are estimated for EPBs that move roughly eastward and parallel to the geomagnetic equator with speeds between 40 and 250 m/s. These parameters are key to the development of a GBAS ionospheric mitigation and safety case for operational approval in Brazil and other low‐latitude locations. Copyright © 2017 Institute of Navigation


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Equatorial Plasma Bubble Threat Parameterization to Support GBAS Operations in the Brazilian Region



    Published in:

    Navigation ; 64 , 3


    Publication date :

    2017




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    55.54 Flugführung / 55.86 Schiffsverkehr, Schifffahrt / 53.84 Ortungstechnik, Radartechnik
    Local classification TIB:    770/5680/7035



    Preliminary Results from Ionospheric Threat Model Development to Support GBAS Operations in the Brazilian Region

    Lee, Jiyun / Yoon, Moonseok / Pullen, Sam et al. | British Library Conference Proceedings | 2015


    Advanced Warning of Threatening Equatorial Plasma Bubbles to Support GBAS in Low Latitudes

    Marini-Pereira, Leonardo / de Oliveira Moraes, Alison / Pullen, Sam | IEEE | 2023


    Ionosphere Threat Space Model Assessment for GBAS

    Mayer, C. / Belabbas, B. / Jakowski, N. et al. | British Library Conference Proceedings | 2009



    Ionospheric Gradient Threat Mitigation in Future Dual Frequency GBAS

    Michael Felux / Mihaela-Simona Circiu / Jiyun Lee et al. | DOAJ | 2017

    Free access