Assessment of global ionospheric maps performance by means of ionosonde data
This work presents a new method for assessing global ionospheric maps (GIM) using ionosonde data. The method is based on the critical frequency at the F2 layer directly measured by ionosondes to validate VTEC (vertical total electron content) values from GIMs. The analysis considered four different...
| Autores: | ; ; ; ; |
|---|---|
| Tipo de documento: | Artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/340806 |
| Acceso en línea: | https://hdl.handle.net/2117/340806 https://dx.doi.org/10.3390/rs12203452 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Astronomy and astrophysics ionosphere global ionospheric maps ionosonde equatorial region Astrofísica Classificació AMS::85 Astronomy and astrophysics Àrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències |
| _version_ | 1878735947175034880 |
|---|---|
| author | Jerez, Gabriel Olivera |
| author2 | Hernández Pajares, Manuel|||0000-0002-9687-5850 Prol, Fabricio dos Santos Alves, Daniele Barroca Marra Monico, João Francisco Galera|||0000-0003-4101-9261 |
| author2_role | author author author author |
| author_browse | Alves, Daniele Barroca Marra Hernández Pajares, Manuel|||0000-0002-9687-5850 Jerez, Gabriel Olivera Monico, João Francisco Galera|||0000-0003-4101-9261 Prol, Fabricio dos Santos |
| author_facet | Jerez, Gabriel Olivera Hernández Pajares, Manuel|||0000-0002-9687-5850 Prol, Fabricio dos Santos Alves, Daniele Barroca Marra Monico, João Francisco Galera|||0000-0003-4101-9261 |
| author_role | author |
| collection | UPCommons. Portal del coneixement obert de la UPC |
| description | This work presents a new method for assessing global ionospheric maps (GIM) using ionosonde data. The method is based on the critical frequency at the F2 layer directly measured by ionosondes to validate VTEC (vertical total electron content) values from GIMs. The analysis considered four different approaches to using foF2. The study was performed over one of the most challenging scenarios, the Brazilian region, considering four ionosondes (combined in six pairs) and thirteen GIM products available at CDDIS (Crustal Dynamics Data Information System). Analysis was conducted using daily, weekly, one year (2015), and four years (2014–2017) of data. Additional information from the ionosphere was estimated to complement the daily analysis, such as slab thickness and shape function peak. Results indicated that slab thickness and shape function peak could be used as alternative indicators of periods and regions where this method could be applied. The weekly analysis indicated the squared frequency ratio with local time correction as the best approach of using foF2, between the ones evaluated. The analysis of one-year data (2015) was performed considering thirteen GIMs, where CODG and UQRG were the two GIMs that presented the best performance. The four-year time series (2014–2017) were analyzed considering these two products. Regional and temporal ionospheric influences could be noticed in the results, with expected larger errors during the solar cycle peak in 2014 and at locations with pairs of ionosondes with the larger distance apart. Therefore, we have confirmed the viability of the developed approach as an assessment method to analyze GIMs quality based on ionosonde data. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_860b2b86cfdb3310cfd5d45e1e2f2cfd |
| institution | Universitat Politècnica de Catalunya (UPC) |
| instname_str | Universitat Politècnica de Catalunya (UPC) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:upcommons.upc.edu:2117/340806 |
| publishDate | 2020 |
| publishDateSort | 2020 |
| publisher | Multidisciplinary Digital Publishing Institute (MDPI) |
| publisherStr | Multidisciplinary Digital Publishing Institute (MDPI) |
| reponame_str | UPCommons. Portal del coneixement obert de la UPC |
| spelling | Assessment of global ionospheric maps performance by means of ionosonde data Jerez, Gabriel Olivera Hernández Pajares, Manuel|||0000-0002-9687-5850 Prol, Fabricio dos Santos Alves, Daniele Barroca Marra Monico, João Francisco Galera|||0000-0003-4101-9261 Astronomy and astrophysics ionosphere global ionospheric maps ionosonde equatorial region Astrofísica Classificació AMS::85 Astronomy and astrophysics Àrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències This work presents a new method for assessing global ionospheric maps (GIM) using ionosonde data. The method is based on the critical frequency at the F2 layer directly measured by ionosondes to validate VTEC (vertical total electron content) values from GIMs. The analysis considered four different approaches to using foF2. The study was performed over one of the most challenging scenarios, the Brazilian region, considering four ionosondes (combined in six pairs) and thirteen GIM products available at CDDIS (Crustal Dynamics Data Information System). Analysis was conducted using daily, weekly, one year (2015), and four years (2014–2017) of data. Additional information from the ionosphere was estimated to complement the daily analysis, such as slab thickness and shape function peak. Results indicated that slab thickness and shape function peak could be used as alternative indicators of periods and regions where this method could be applied. The weekly analysis indicated the squared frequency ratio with local time correction as the best approach of using foF2, between the ones evaluated. The analysis of one-year data (2015) was performed considering thirteen GIMs, where CODG and UQRG were the two GIMs that presented the best performance. The four-year time series (2014–2017) were analyzed considering these two products. Regional and temporal ionospheric influences could be noticed in the results, with expected larger errors during the solar cycle peak in 2014 and at locations with pairs of ionosondes with the larger distance apart. Therefore, we have confirmed the viability of the developed approach as an assessment method to analyze GIMs quality based on ionosonde data. We acknowledge INPE for providing the ionosonde data, the IGS IAACs, in particular, CODE, ESA, JPL, UPC, and WHU, for providing global ionospheric maps and the National Institute of Science and Technology for GNSS in Support of Air Navigation (INCT GNSS-NavAer), funded by CNPq (465648/2014-2), FAPESP (2017/50115-0), and CAPES (88887.137186/2017-00). Peer Reviewed Multidisciplinary Digital Publishing Institute (MDPI) https://hdl.handle.net/2117/340806 https://dx.doi.org/10.3390/rs12203452 |
| spellingShingle | Assessment of global ionospheric maps performance by means of ionosonde data Jerez, Gabriel Olivera Astronomy and astrophysics ionosphere global ionospheric maps ionosonde equatorial region Astrofísica Classificació AMS::85 Astronomy and astrophysics Àrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències |
| title | Assessment of global ionospheric maps performance by means of ionosonde data |
| title_full | Assessment of global ionospheric maps performance by means of ionosonde data |
| title_fullStr | Assessment of global ionospheric maps performance by means of ionosonde data |
| title_full_unstemmed | Assessment of global ionospheric maps performance by means of ionosonde data |
| title_short | Assessment of global ionospheric maps performance by means of ionosonde data |
| title_sort | Assessment of global ionospheric maps performance by means of ionosonde data |
| topic | Astronomy and astrophysics ionosphere global ionospheric maps ionosonde equatorial region Astrofísica Classificació AMS::85 Astronomy and astrophysics Àrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències |
| topic_facet | Astronomy and astrophysics ionosphere global ionospheric maps ionosonde equatorial region Astrofísica Classificació AMS::85 Astronomy and astrophysics Àrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències |
| url | https://hdl.handle.net/2117/340806 https://dx.doi.org/10.3390/rs12203452 |