A Global Empirical Model of Electron Density Profile in the F Region Ionosphere Basing on COSMIC Measurements
Abstract The topside ionosphere accounts for a dominant part of the ionospheric total electron content, whereas accurate global modeling of topside ionospheric electron density (Ne) profile has not been fully achieved. In this study, a high precision Ne profile model, named α‐Chapman Based Electron...
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| Format: | Article |
| Language: | English |
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Wiley
2021-04-01
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| Series: | Space Weather |
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| Online Access: | https://doi.org/10.1029/2020SW002642 |
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| author | Qiaoling Li Libo Liu Maosheng He He Huang Jiahao Zhong Na Yang Man‐Lian Zhang Jinzhe Jiang Yiding Chen Huijun Le Jun Cui |
| author_facet | Qiaoling Li Libo Liu Maosheng He He Huang Jiahao Zhong Na Yang Man‐Lian Zhang Jinzhe Jiang Yiding Chen Huijun Le Jun Cui |
| author_sort | Qiaoling Li |
| collection | DOAJ |
| description | Abstract The topside ionosphere accounts for a dominant part of the ionospheric total electron content, whereas accurate global modeling of topside ionospheric electron density (Ne) profile has not been fully achieved. In this study, a high precision Ne profile model, named α‐Chapman Based Electron Density Profile Model (α‐Chapman‐Based‐EDP), was built by using ∼4.5 million Ne profiles from the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC‐1) radio occultations. We first describe each of the profiles using five parameters of the α‐Chapman function, that is, peak density (NmF2) and height (hmF2) of F2 layer, scale height (Hm) as well as its altitude change rates, and then built a model for each of the parameters as a function of latitude, longitude, month, local time, and solar activity, through Empirical orthogonal function (EOF) analysis and Fourier expansion. Combining all the five models, we construct the α‐Chapman‐Based‐EDP. Compared with observations from COSMIC‐1 and ‐2, the model captures the ionospheric climatology well, such as solar activity dependence, seasonal variation, and spatial pattern, including the equatorial ionization anomaly and midlatitude trough as well as their variabilities. Our model can describe nearly 80% variability of Ne in F region. In contrast, the IRI2016 cannot well reproduce these characteristics, with errors higher than our model. The potential applications of our model were also discussed. A dense matrix data calculated by the model will be released in https://www.researchgate.net/profile/Qiaoling_Li5 with the permissions of COSMIC organizations. |
| format | Article |
| id | doaj-art-c6d5e951c91f4e59b6a2597eac6c9091 |
| institution | Kabale University |
| issn | 1542-7390 |
| language | English |
| publishDate | 2021-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-c6d5e951c91f4e59b6a2597eac6c90912025-01-14T16:31:29ZengWileySpace Weather1542-73902021-04-01194n/an/a10.1029/2020SW002642A Global Empirical Model of Electron Density Profile in the F Region Ionosphere Basing on COSMIC MeasurementsQiaoling Li0Libo Liu1Maosheng He2He Huang3Jiahao Zhong4Na Yang5Man‐Lian Zhang6Jinzhe Jiang7Yiding Chen8Huijun Le9Jun Cui10Planetary Environmental and Astrobiological Research Laboratory (PEARL) School of Atmospheric Sciences Sun Yat‐Sen University Zhuhai ChinaKey Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaLeibniz‐Institute of Atmospheric Physics at the Rostock University Kühlungsborn GermanyNational Institute of Natural Hazards Ministry of Emergency Management Beijing ChinaPlanetary Environmental and Astrobiological Research Laboratory (PEARL) School of Atmospheric Sciences Sun Yat‐Sen University Zhuhai ChinaHubei Subsurface Multi‐Scale Imaging Key Laboratory Institute of Geophysics and Geomatics China University of Geosciences Wuhan ChinaKey Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaState Key Laboratory of High‐end Server & Storage Technology Jinan ChinaKey Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaKey Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaPlanetary Environmental and Astrobiological Research Laboratory (PEARL) School of Atmospheric Sciences Sun Yat‐Sen University Zhuhai ChinaAbstract The topside ionosphere accounts for a dominant part of the ionospheric total electron content, whereas accurate global modeling of topside ionospheric electron density (Ne) profile has not been fully achieved. In this study, a high precision Ne profile model, named α‐Chapman Based Electron Density Profile Model (α‐Chapman‐Based‐EDP), was built by using ∼4.5 million Ne profiles from the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC‐1) radio occultations. We first describe each of the profiles using five parameters of the α‐Chapman function, that is, peak density (NmF2) and height (hmF2) of F2 layer, scale height (Hm) as well as its altitude change rates, and then built a model for each of the parameters as a function of latitude, longitude, month, local time, and solar activity, through Empirical orthogonal function (EOF) analysis and Fourier expansion. Combining all the five models, we construct the α‐Chapman‐Based‐EDP. Compared with observations from COSMIC‐1 and ‐2, the model captures the ionospheric climatology well, such as solar activity dependence, seasonal variation, and spatial pattern, including the equatorial ionization anomaly and midlatitude trough as well as their variabilities. Our model can describe nearly 80% variability of Ne in F region. In contrast, the IRI2016 cannot well reproduce these characteristics, with errors higher than our model. The potential applications of our model were also discussed. A dense matrix data calculated by the model will be released in https://www.researchgate.net/profile/Qiaoling_Li5 with the permissions of COSMIC organizations.https://doi.org/10.1029/2020SW002642α‐Chapman functionCOSMICequatorial ionization anomalyempirical model of Ne profilemid‐latitude troughtopside ionosphere |
| spellingShingle | Qiaoling Li Libo Liu Maosheng He He Huang Jiahao Zhong Na Yang Man‐Lian Zhang Jinzhe Jiang Yiding Chen Huijun Le Jun Cui A Global Empirical Model of Electron Density Profile in the F Region Ionosphere Basing on COSMIC Measurements Space Weather α‐Chapman function COSMIC equatorial ionization anomaly empirical model of Ne profile mid‐latitude trough topside ionosphere |
| title | A Global Empirical Model of Electron Density Profile in the F Region Ionosphere Basing on COSMIC Measurements |
| title_full | A Global Empirical Model of Electron Density Profile in the F Region Ionosphere Basing on COSMIC Measurements |
| title_fullStr | A Global Empirical Model of Electron Density Profile in the F Region Ionosphere Basing on COSMIC Measurements |
| title_full_unstemmed | A Global Empirical Model of Electron Density Profile in the F Region Ionosphere Basing on COSMIC Measurements |
| title_short | A Global Empirical Model of Electron Density Profile in the F Region Ionosphere Basing on COSMIC Measurements |
| title_sort | global empirical model of electron density profile in the f region ionosphere basing on cosmic measurements |
| topic | α‐Chapman function COSMIC equatorial ionization anomaly empirical model of Ne profile mid‐latitude trough topside ionosphere |
| url | https://doi.org/10.1029/2020SW002642 |
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