Estimation of ionospheric delay of NavIC/IRNSS signals using the Taylor Series Expansion
The delay in Navigation with Indian Constellation (NavIC)/Indian Regional Navigation Satellite System (IRNSS) signals due to the ionosphere are decisive because it leads to significant changes in the positional accuracy of the system. In this paper, we try to estimate the ionospheric time delay (ion...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2019-01-01
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| Series: | Journal of Space Weather and Space Climate |
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| Online Access: | https://www.swsc-journal.org/articles/swsc/full_html/2019/01/swsc180057/swsc180057.html |
| _version_ | 1818663512002527232 |
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| author | Desai Mehul V. Shah Shweta N. |
| author_facet | Desai Mehul V. Shah Shweta N. |
| author_sort | Desai Mehul V. |
| collection | DOAJ |
| description | The delay in Navigation with Indian Constellation (NavIC)/Indian Regional Navigation Satellite System (IRNSS) signals due to the ionosphere are decisive because it leads to significant changes in the positional accuracy of the system. In this paper, we try to estimate the ionospheric time delay (ionodelay) precisely using the local Taylor Series Expansion (TSE) algorithm for a single frequency NavIC/IRNSS system. The performance of the local TSE algorithm is examined by considering two cases. In case I, the TSE was validated under the influence of an intense geomagnetic storm (8 September 2017) by considering NavIC/IRNSS data from the Indian equatorial and Equatorial Ionization Anomaly (EIA) regions. In case II, based on the quiet and disturbed days data, the local TSE model was examined at different locations in the local area (<10 km) using two NavIC/IRNSS receivers (i.e. reference and rover). The results of ionodelay and positional accuracy (Three Dimensional Distance Root Mean Square [3DRMS], Circular Error Probability [CEP], and Spherical Error Probability [SEP]) of NavIC/IRNSS for both the cases indicates that the single frequency local TSE algorithm performs the same as the reference dual frequency model, where as the global eight coefficient Klobuchar and the regional Grid Ionospheric Vertical Error (GIVE) model behaves differently. Therefore, the single-frequency TSE model improves the performance of the NavIC/IRNSS receiver in the local area, and the mathematical coefficient computation and additional frequency hardware cost have been reduced, with the acceptance of a maximum 0.8 m of errors. |
| first_indexed | 2024-12-17T05:18:01Z |
| format | Article |
| id | doaj.art-475ab7b46f2543dc8a485980034e6f4e |
| institution | Directory Open Access Journal |
| issn | 2115-7251 |
| language | English |
| last_indexed | 2024-12-17T05:18:01Z |
| publishDate | 2019-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Journal of Space Weather and Space Climate |
| spelling | doaj.art-475ab7b46f2543dc8a485980034e6f4e2022-12-21T22:02:03ZengEDP SciencesJournal of Space Weather and Space Climate2115-72512019-01-019A2310.1051/swsc/2019023swsc180057Estimation of ionospheric delay of NavIC/IRNSS signals using the Taylor Series ExpansionDesai Mehul V.Shah Shweta N.The delay in Navigation with Indian Constellation (NavIC)/Indian Regional Navigation Satellite System (IRNSS) signals due to the ionosphere are decisive because it leads to significant changes in the positional accuracy of the system. In this paper, we try to estimate the ionospheric time delay (ionodelay) precisely using the local Taylor Series Expansion (TSE) algorithm for a single frequency NavIC/IRNSS system. The performance of the local TSE algorithm is examined by considering two cases. In case I, the TSE was validated under the influence of an intense geomagnetic storm (8 September 2017) by considering NavIC/IRNSS data from the Indian equatorial and Equatorial Ionization Anomaly (EIA) regions. In case II, based on the quiet and disturbed days data, the local TSE model was examined at different locations in the local area (<10 km) using two NavIC/IRNSS receivers (i.e. reference and rover). The results of ionodelay and positional accuracy (Three Dimensional Distance Root Mean Square [3DRMS], Circular Error Probability [CEP], and Spherical Error Probability [SEP]) of NavIC/IRNSS for both the cases indicates that the single frequency local TSE algorithm performs the same as the reference dual frequency model, where as the global eight coefficient Klobuchar and the regional Grid Ionospheric Vertical Error (GIVE) model behaves differently. Therefore, the single-frequency TSE model improves the performance of the NavIC/IRNSS receiver in the local area, and the mathematical coefficient computation and additional frequency hardware cost have been reduced, with the acceptance of a maximum 0.8 m of errors.https://www.swsc-journal.org/articles/swsc/full_html/2019/01/swsc180057/swsc180057.htmlNavigation with Indian Constellation (NavIC)Indian Regional Navigation Satellite System (IRNSS)coefficient based modelregional modelTaylor Series Expansion (TSE)ionospheric delaypositional accuracy |
| spellingShingle | Desai Mehul V. Shah Shweta N. Estimation of ionospheric delay of NavIC/IRNSS signals using the Taylor Series Expansion Journal of Space Weather and Space Climate Navigation with Indian Constellation (NavIC) Indian Regional Navigation Satellite System (IRNSS) coefficient based model regional model Taylor Series Expansion (TSE) ionospheric delay positional accuracy |
| title | Estimation of ionospheric delay of NavIC/IRNSS signals using the Taylor Series Expansion |
| title_full | Estimation of ionospheric delay of NavIC/IRNSS signals using the Taylor Series Expansion |
| title_fullStr | Estimation of ionospheric delay of NavIC/IRNSS signals using the Taylor Series Expansion |
| title_full_unstemmed | Estimation of ionospheric delay of NavIC/IRNSS signals using the Taylor Series Expansion |
| title_short | Estimation of ionospheric delay of NavIC/IRNSS signals using the Taylor Series Expansion |
| title_sort | estimation of ionospheric delay of navic irnss signals using the taylor series expansion |
| topic | Navigation with Indian Constellation (NavIC) Indian Regional Navigation Satellite System (IRNSS) coefficient based model regional model Taylor Series Expansion (TSE) ionospheric delay positional accuracy |
| url | https://www.swsc-journal.org/articles/swsc/full_html/2019/01/swsc180057/swsc180057.html |
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