IONORING: Real-Time Monitoring of the Total Electron Content over Italy
IONORING (IONOspheric RING) is a tool capable to provide the real-time monitoring and modeling of the ionospheric Total Electron Content (TEC) over Italy, in the latitudinal and longitudinal ranges of 35°N–48°N and 5°E–20°E, respectively. IONORING exploits the Global Navigation Satellite System (GNS...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-08-01
|
| Series: | Remote Sensing |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-4292/13/16/3290 |
| _version_ | 1797522135272390656 |
|---|---|
| author | Claudio Cesaroni Luca Spogli Giorgiana De Franceschi |
| author_facet | Claudio Cesaroni Luca Spogli Giorgiana De Franceschi |
| author_sort | Claudio Cesaroni |
| collection | DOAJ |
| description | IONORING (IONOspheric RING) is a tool capable to provide the real-time monitoring and modeling of the ionospheric Total Electron Content (TEC) over Italy, in the latitudinal and longitudinal ranges of 35°N–48°N and 5°E–20°E, respectively. IONORING exploits the Global Navigation Satellite System (GNSS) data acquired by the RING (Rete Integrata Nazionale GNSS) network, managed by the Istituto Nazionale di Geofisica e Vulcanologia (INGV). The system provides TEC real-time maps with a very fine spatial resolution (0.1° latitude x 0.1° longitude), with a refresh time of 10 min and a typical latency below the minute. The TEC estimated at the ionospheric piercing points from about 40 RING stations, equally distributed over the Italian territory, are interpolated using locally (weighted) regression scatter plot smoothing (LOWESS). The validation is performed by comparing the IONORING TEC maps (in real-time) with independent products: (i) the Global Ionospheric Maps (GIM) - final product- provided by the International GNSS Service (IGS), and (ii) the European TEC maps from the Royal Observatory of Belgium. The validation results are satisfactory in terms of Root Mean Square Error (RMSE) between 2 and 3 TECu for both comparisons. The potential of IONORING in depicting the TEC daily and seasonal variations is analyzed over 3 years, from May 2017 to April 2020, as well as its capability to account for the effect of the disturbed geospace on the ionosphere at mid-latitudes. The IONORING response to the X9.3 flare event of September 2017 highlights a sudden TEC increase over Italy of about 20%, with a small, expected dependence on the latitude, i.e., on the distance from the subsolar point. Subsequent large regional TEC various were observed in response to related follow-on geomagnetic storms. This storm is also used as a case event to demonstrate the potential of IONORING in improving the accuracy of the GNSS Single Point Positioning. By processing data in kinematic mode and by using the Klobuchar as the model to provide the ionospheric correction, the resulting Horizontal Positioning Error is 4.3 m, lowering to, 3.84 m when GIM maps are used. If IONORING maps are used as the reference ionosphere, the error is as low as 2.5 m. Real-times application and services in which IONORING is currently integrated are also described in the conclusive remarks. |
| first_indexed | 2024-03-10T08:25:08Z |
| format | Article |
| id | doaj.art-26efc07a8e504c7cb15a605e0637658d |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T08:25:08Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-26efc07a8e504c7cb15a605e0637658d2023-11-22T09:35:13ZengMDPI AGRemote Sensing2072-42922021-08-011316329010.3390/rs13163290IONORING: Real-Time Monitoring of the Total Electron Content over ItalyClaudio Cesaroni0Luca Spogli1Giorgiana De Franceschi2Istituto Nazionale di Geofisica e Vulcanologia, 00143 Rome, ItalyIstituto Nazionale di Geofisica e Vulcanologia, 00143 Rome, ItalyIstituto Nazionale di Geofisica e Vulcanologia, 00143 Rome, ItalyIONORING (IONOspheric RING) is a tool capable to provide the real-time monitoring and modeling of the ionospheric Total Electron Content (TEC) over Italy, in the latitudinal and longitudinal ranges of 35°N–48°N and 5°E–20°E, respectively. IONORING exploits the Global Navigation Satellite System (GNSS) data acquired by the RING (Rete Integrata Nazionale GNSS) network, managed by the Istituto Nazionale di Geofisica e Vulcanologia (INGV). The system provides TEC real-time maps with a very fine spatial resolution (0.1° latitude x 0.1° longitude), with a refresh time of 10 min and a typical latency below the minute. The TEC estimated at the ionospheric piercing points from about 40 RING stations, equally distributed over the Italian territory, are interpolated using locally (weighted) regression scatter plot smoothing (LOWESS). The validation is performed by comparing the IONORING TEC maps (in real-time) with independent products: (i) the Global Ionospheric Maps (GIM) - final product- provided by the International GNSS Service (IGS), and (ii) the European TEC maps from the Royal Observatory of Belgium. The validation results are satisfactory in terms of Root Mean Square Error (RMSE) between 2 and 3 TECu for both comparisons. The potential of IONORING in depicting the TEC daily and seasonal variations is analyzed over 3 years, from May 2017 to April 2020, as well as its capability to account for the effect of the disturbed geospace on the ionosphere at mid-latitudes. The IONORING response to the X9.3 flare event of September 2017 highlights a sudden TEC increase over Italy of about 20%, with a small, expected dependence on the latitude, i.e., on the distance from the subsolar point. Subsequent large regional TEC various were observed in response to related follow-on geomagnetic storms. This storm is also used as a case event to demonstrate the potential of IONORING in improving the accuracy of the GNSS Single Point Positioning. By processing data in kinematic mode and by using the Klobuchar as the model to provide the ionospheric correction, the resulting Horizontal Positioning Error is 4.3 m, lowering to, 3.84 m when GIM maps are used. If IONORING maps are used as the reference ionosphere, the error is as low as 2.5 m. Real-times application and services in which IONORING is currently integrated are also described in the conclusive remarks.https://www.mdpi.com/2072-4292/13/16/3290TEC mapssingle point positioningionospherespace weathermid-latitude ionosphere |
| spellingShingle | Claudio Cesaroni Luca Spogli Giorgiana De Franceschi IONORING: Real-Time Monitoring of the Total Electron Content over Italy Remote Sensing TEC maps single point positioning ionosphere space weather mid-latitude ionosphere |
| title | IONORING: Real-Time Monitoring of the Total Electron Content over Italy |
| title_full | IONORING: Real-Time Monitoring of the Total Electron Content over Italy |
| title_fullStr | IONORING: Real-Time Monitoring of the Total Electron Content over Italy |
| title_full_unstemmed | IONORING: Real-Time Monitoring of the Total Electron Content over Italy |
| title_short | IONORING: Real-Time Monitoring of the Total Electron Content over Italy |
| title_sort | ionoring real time monitoring of the total electron content over italy |
| topic | TEC maps single point positioning ionosphere space weather mid-latitude ionosphere |
| url | https://www.mdpi.com/2072-4292/13/16/3290 |
| work_keys_str_mv | AT claudiocesaroni ionoringrealtimemonitoringofthetotalelectroncontentoveritaly AT lucaspogli ionoringrealtimemonitoringofthetotalelectroncontentoveritaly AT giorgianadefranceschi ionoringrealtimemonitoringofthetotalelectroncontentoveritaly |