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Modelling of ionospheric time delays based on adjusted spherical harmonic analysis

    J R K Kumar Dabbakuti Affiliation
    ; D. Venkata Ratnam Affiliation
    ; Surendra Sunda Affiliation

Abstract

The ionosphere is the region of the upper atmosphere and the study of the upper atmosphere has a significant role in monitoring, modeling and forecasting for satellite based navigation services. As India lies in a low latitude region, a more careful approach has to be taken to characterize the ionosphere due to the irregularities and equatorial anomaly conditions. In order to study the ionospheric temporal variations, a regional ionospheric model based on the Adjusted Spherical Harmonic Analysis (ASHA) is implemented. The results indicate that the ASHA model is one of the contenders for estimating ionospheric delays well for GNSS augmentation systems.

Keyword : Global Position Systems (GPS), Total Electron content (TEC), Spherical Harmonic Analysis (SHA), Adjusted Spherical Harmonic Analysis (ASHA), Global Navigation Satellite Systems (GNSS)

How to Cite
Dabbakuti, J. R. K. K., Ratnam, D. V., & Sunda, S. (2016). Modelling of ionospheric time delays based on adjusted spherical harmonic analysis. Aviation, 20(1), 1-7. https://doi.org/10.3846/16487788.2016.1162197
Published in Issue
Apr 11, 2016
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This work is licensed under a Creative Commons Attribution 4.0 International License.