PPP at Low Latitudes With Ionospheric Model Exclusively Based on Single Frequency GNSS Measurements
Abstract Single frequency users of the Global Navigation Satellite System (GNSS) should correct the ionospheric delay to obtain positioning solutions. A valuable source of ionospheric delay corrections is the global ionospheric models (GIMs) of Vertical Total Electron Content. The accuracy of GIMs i...
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| Format: | Article |
| Language: | English |
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Wiley
2023-08-01
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| Series: | Space Weather |
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| Online Access: | https://doi.org/10.1029/2023SW003513 |
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| author | Ana L. Christovam Fabricio S. Prol Gabriel O. Jerez Manuel Hernández‐Pajares Paulo O. Camargo |
| author_facet | Ana L. Christovam Fabricio S. Prol Gabriel O. Jerez Manuel Hernández‐Pajares Paulo O. Camargo |
| author_sort | Ana L. Christovam |
| collection | DOAJ |
| description | Abstract Single frequency users of the Global Navigation Satellite System (GNSS) should correct the ionospheric delay to obtain positioning solutions. A valuable source of ionospheric delay corrections is the global ionospheric models (GIMs) of Vertical Total Electron Content. The accuracy of GIMs is therefore important to improve the positioning accuracy. One of the main issues that affects the GIM performance, especially at low latitude regions, is the high sensitivity of the global positioning system (GPS) L2 frequency to ionospheric scintillation. As an attempt to overcome this issue, in this work, we study the capabilities of using only GPS L1 frequency to compute ionospheric corrections in form of regional ionospheric maps. The performance of the new ionospheric model is evaluated by means of single frequency precise point positioning, comparing the positioning results against the correction using dual‐frequency GPS signals, as well as compared to the corrections provided by GIMs produced by the international GNSS service. As a result, the positioning performance using single frequency model presented similar accuracy to the dual frequency models and, at the same time, provided less observations affected by ionospheric scintillations. These results demonstrate the feasibility of using single frequency GNSS data to develop ionospheric models and to improve the positioning over low latitudes. |
| format | Article |
| id | doaj-art-b9d0f1c2e17249daa8ae90df8c62f5d6 |
| institution | OA Journals |
| issn | 1542-7390 |
| language | English |
| publishDate | 2023-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-b9d0f1c2e17249daa8ae90df8c62f5d62025-08-20T02:35:51ZengWileySpace Weather1542-73902023-08-01218n/an/a10.1029/2023SW003513PPP at Low Latitudes With Ionospheric Model Exclusively Based on Single Frequency GNSS MeasurementsAna L. Christovam0Fabricio S. Prol1Gabriel O. Jerez2Manuel Hernández‐Pajares3Paulo O. Camargo4Department of Cartography São Paulo State University (UNESP) São Paulo BrazilDepartment of Navigation and Positioning Finnish Geospatial Research Institute National Land Survey of Finland Espoo FinlandDepartment of Cartography São Paulo State University (UNESP) São Paulo BrazilDepartment of Mathematics UPC‐IonSAT and UPC‐IEEC Research Groups Universitat Politècnica de Catalunya (UPC) Barcelona SpainDepartment of Cartography São Paulo State University (UNESP) São Paulo BrazilAbstract Single frequency users of the Global Navigation Satellite System (GNSS) should correct the ionospheric delay to obtain positioning solutions. A valuable source of ionospheric delay corrections is the global ionospheric models (GIMs) of Vertical Total Electron Content. The accuracy of GIMs is therefore important to improve the positioning accuracy. One of the main issues that affects the GIM performance, especially at low latitude regions, is the high sensitivity of the global positioning system (GPS) L2 frequency to ionospheric scintillation. As an attempt to overcome this issue, in this work, we study the capabilities of using only GPS L1 frequency to compute ionospheric corrections in form of regional ionospheric maps. The performance of the new ionospheric model is evaluated by means of single frequency precise point positioning, comparing the positioning results against the correction using dual‐frequency GPS signals, as well as compared to the corrections provided by GIMs produced by the international GNSS service. As a result, the positioning performance using single frequency model presented similar accuracy to the dual frequency models and, at the same time, provided less observations affected by ionospheric scintillations. These results demonstrate the feasibility of using single frequency GNSS data to develop ionospheric models and to improve the positioning over low latitudes.https://doi.org/10.1029/2023SW003513GIMkinematic PPPGPSionospheric delay |
| spellingShingle | Ana L. Christovam Fabricio S. Prol Gabriel O. Jerez Manuel Hernández‐Pajares Paulo O. Camargo PPP at Low Latitudes With Ionospheric Model Exclusively Based on Single Frequency GNSS Measurements Space Weather GIM kinematic PPP GPS ionospheric delay |
| title | PPP at Low Latitudes With Ionospheric Model Exclusively Based on Single Frequency GNSS Measurements |
| title_full | PPP at Low Latitudes With Ionospheric Model Exclusively Based on Single Frequency GNSS Measurements |
| title_fullStr | PPP at Low Latitudes With Ionospheric Model Exclusively Based on Single Frequency GNSS Measurements |
| title_full_unstemmed | PPP at Low Latitudes With Ionospheric Model Exclusively Based on Single Frequency GNSS Measurements |
| title_short | PPP at Low Latitudes With Ionospheric Model Exclusively Based on Single Frequency GNSS Measurements |
| title_sort | ppp at low latitudes with ionospheric model exclusively based on single frequency gnss measurements |
| topic | GIM kinematic PPP GPS ionospheric delay |
| url | https://doi.org/10.1029/2023SW003513 |
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