Performance of ionospheric maps in support of long baseline GNSS kinematic positioning at low latitudes

Park, J. and Sreeja, V. and Aquino, M. and Cesaroni, C. and Spogli, L. and Dodson, A. and De Franceschi, G. (2016) Performance of ionospheric maps in support of long baseline GNSS kinematic positioning at low latitudes. Radio Science, 51 (5). pp. 429-442. ISSN 1944-799X

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Abstract

Ionospheric scintillation occurs mainly at high and low latitude regions of the Earth and may impose serious degradation on GNSS (Global Navigation Satellite System) functionality. The Brazilian territory sits on one of the most affected areas of the globe, where the ionosphere behaves very unpredictably, with strong scintillation frequently occurring in the local postsunset hours. The correlation between scintillation occurrence and sharp variations in the ionospheric total electron content (TEC) in Brazil is demonstrated in Spogli et al. (2013). The compounded effect of these associated ionospheric disturbances on long baseline GNSS kinematic positioning is studied in this paper, in particular when ionospheric maps are used to aid the positioning solution. The experiments have been conducted using data from GNSS reference stations in Brazil. The use of a regional TEC map generated under the CALIBRA (Countering GNSS high-Accuracy applications Limitations due to Ionospheric disturbances in BRAzil) project, referred to as CALIBRA TEC map (CTM), was compared to the use of the Global Ionosphere Map (GIM), provided by the International GNSS Service (IGS). Results show that the use of the CTM greatly improves the kinematic positioning solution as compared with that using the GIM, especially under disturbed ionospheric conditions. Additionally, different hypotheses were tested regarding the precision of the TEC values obtained from ionospheric maps, and its effect on the long baseline kinematic solution evaluated. Finally, this study compares two interpolation methods for ionospheric maps, namely, the Inverse Distance Weight and the Natural Neighbor.

Item Type: Article
Additional Information: Park, J., V. Sreeja, M. Aquino, C. Cesaroni, L. Spogli, A. Dodson, and G. De Franceschi (2016), Performance of ionospheric maps in support of long baseline GNSS kinematic positioning at low latitudes, Radio Sci., 51, doi:10.1002/ 2015RS005933. To view the published open abstract, go to http://dx.doi.org and enter the DOI
Schools/Departments: University of Nottingham UK Campus > Faculty of Engineering
Identification Number: https://doi.org/10.1002/2015RS005933
Related URLs:
URLURL Type
http://dx.doi.org/10.1002/2015RS005933UNSPECIFIED
Depositing User: Eprints, Support
Date Deposited: 08 Jul 2016 14:04
Last Modified: 23 Oct 2016 01:16
URI: http://eprints.nottingham.ac.uk/id/eprint/34765

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