{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:05:43Z","timestamp":1760148343389,"version":"build-2065373602"},"reference-count":58,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2023,4,23]],"date-time":"2023-04-23T00:00:00Z","timestamp":1682208000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Hubei natural science foundation","award":["2022CFB651","42204161","42074187","20200101","2019CFA054"],"award-info":[{"award-number":["2022CFB651","42204161","42074187","20200101","2019CFA054"]}]},{"name":"National Natural Science Foundation of China","award":["2022CFB651","42204161","42074187","20200101","2019CFA054"],"award-info":[{"award-number":["2022CFB651","42204161","42074187","20200101","2019CFA054"]}]},{"name":"Foundation of the National Key Laboratory of Electromagnetic Environment","award":["2022CFB651","42204161","42074187","20200101","2019CFA054"],"award-info":[{"award-number":["2022CFB651","42204161","42074187","20200101","2019CFA054"]}]},{"name":"Excellent Youth Foundation of Hubei Provincial Natural Science Foundation","award":["2022CFB651","42204161","42074187","20200101","2019CFA054"],"award-info":[{"award-number":["2022CFB651","42204161","42074187","20200101","2019CFA054"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The ratio of the total electron content (TEC) to the F2-layer peak electron density (NmF2) is known as the ionospheric equivalent slab thickness (EST, also known as \u03c4), and it is a crucial indicator of the ionosphere. Using TEC and NmF2 data from the years 2010 to 2017, this work conducts a comprehensive statistical analysis of the ionospheric slab thickness in Beijing, which is in the midlatitude of East Asia. The outcomes show that the \u03c4 have different diurnal variations at different seasons for high\/low-solar-activity years. On the whole, daytime \u03c4 significantly greater than nighttime \u03c4 in summer, and it is the opposite for the \u03c4 in winter regardless of the solar cycle, whereas the \u03c4 during equinox shows different morphology for high\/low-solar-activity years. Specifically, daytime \u03c4 is larger than nighttime \u03c4 during equinox in years of high-solar activity, while the opposite situation applies for the \u03c4 during equinox in years of low-solar activity. Moreover, the pre-sunrise and post-sunset peaks are most pronounced during winter for low-solar-activity years. In summer, there is a great increase in \u03c4 during the morning hours when compared with other seasons. Furthermore, the \u03c4 decreases with the solar activity during nighttime, whereas it seems there is no correlation between daytime \u03c4 and solar activity. This paper explained the primary diurnal variations in \u03c4 across different seasons during high-\/low-solar-activity years by analyzing relative fluctuations of TEC and NmF2 throughout the corresponding period. In addition, based on the disturbance index (DI), which is calculated by instantaneous \u03c4 and its corresponding median, this paper found that the storm-time \u03c4 might increase when compared with its median value during the daytime, while it may both increase and decrease during the nighttime, especially around dawn and dusk hours. To further analyze the physical mechanism, an example on 2 October 2013 is also presented. The results indicate that the positive disturbance of \u03c4 during the main phase of a geomagnetic storm might be caused by the prompt penetration electric field and neutral wind during the storm, and the \u03c4 increases during the early recovery phase might be due to the disturbance dynamo electric field as well as the neutral wind during the storm. Moreover, there is a negative disturbance of \u03c4 in the recovery phase during the most disturbed sunrise hours, and it might be due to the electric field reversal, neutral wind or other factors during this period. This paper notes the differences of \u03c4 in midlatitude between different longitudinal sectors from the related climatology and storm-time behavior, as it would be helpful to improve the current understanding of \u03c4 at midlatitudes in East Asia.<\/jats:p>","DOI":"10.3390\/rs15092229","type":"journal-article","created":{"date-parts":[[2023,4,24]],"date-time":"2023-04-24T02:06:11Z","timestamp":1682301971000},"page":"2229","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Statistical Study of the Ionospheric Slab Thickness at Beijing Midlatitude Station"],"prefix":"10.3390","volume":"15","author":[{"given":"Yuqiang","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5079-9939","authenticated-orcid":false,"given":"Yong","family":"Zhou","sequence":"additional","affiliation":[{"name":"Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8192-8924","authenticated-orcid":false,"given":"Fubin","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, China"}]},{"given":"Jian","family":"Feng","sequence":"additional","affiliation":[{"name":"China Research Institute of Radiowave Propagation (CRIRP), Qingdao 266107, China"}]},{"given":"Tong","family":"Xu","sequence":"additional","affiliation":[{"name":"China Research Institute of Radiowave Propagation (CRIRP), Qingdao 266107, China"}]},{"given":"Zhongxin","family":"Deng","sequence":"additional","affiliation":[{"name":"China Research Institute of Radiowave Propagation (CRIRP), Qingdao 266107, China"}]},{"given":"Jiawei","family":"Zhu","sequence":"additional","affiliation":[{"name":"Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, China"}]},{"given":"Yi","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, China"}]},{"given":"Xiang","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Artificial Intelligence, Hubei University, Wuhan 430061, China"}]},{"given":"Zhengyu","family":"Zhao","sequence":"additional","affiliation":[{"name":"Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2692-9451","authenticated-orcid":false,"given":"Chen","family":"Zhou","sequence":"additional","affiliation":[{"name":"Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,23]]},"reference":[{"key":"ref_1","unstructured":"Rishbeth, H., and Garriott, O. (1969). Introduction to Ionospheric Physics, Academic Press."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1775","DOI":"10.1016\/0032-0633(73)90168-2","article-title":"The ionospheric slab thickness of the mid-latitude ionosphere","volume":"21","author":"Titheridge","year":"1973","journal-title":"Planet Space Sci."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"185","DOI":"10.1029\/JZ065i001p00185","article-title":"A model of the F-region above hmaxF2","volume":"65","author":"Wright","year":"1960","journal-title":"J. Geophys. Res."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"304","DOI":"10.1002\/2017SW001790","article-title":"Modeling the lower part of the topside ionospheric vertical electron density profile over the European region by means of Swarm satellites data and IRI UP method","volume":"16","author":"Pignalberi","year":"2018","journal-title":"Space Weather"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"867","DOI":"10.1109\/JSTARS.2020.2986683","article-title":"On the analytical description of the topside ionosphere by NeQuick: Modeling the scale height through COSMIC\/FORMOSAT-3 selected data","volume":"13","author":"Pignalberi","year":"2020","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_6","unstructured":"Pignalberi, A., Nava, B., Pezzopane, M., Co\u00efsson, P., and Cesaroni, C. (2022, January 16\u201324). The ionospheric equivalent slab thickness: Global climatological features and data ingestion in the NeQuick model. Proceedings of the 44th COSPAR Scientific Assembly, Athens, Greece."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1007\/s11214-022-00909-z","article-title":"The Ionospheric Equivalent Slab Thickness: A Review Supported by a Global Climatological Study Over Two Solar Cycles","volume":"218","author":"Pignalberi","year":"2022","journal-title":"Space Sci. Rev."},{"key":"ref_8","first-page":"343","article-title":"Ionospheric storm characteristics deduced from satellite radio beacon observations at three European stations","volume":"8","author":"Jakowski","year":"1990","journal-title":"Ann. Geophys."},{"key":"ref_9","unstructured":"Jakowski, N., Mielich, J., Hoque, M.M., and Danielides, M. (2010, January 18\u201325). Equivalent ionospheric slab thickness at the mid-latitude ionosphere during solar cycle 23. Proceedings of the 38th COSPAR Scientific Assembly, Bremen, Germany."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"10","DOI":"10.1051\/swsc\/2020083","article-title":"Global equivalent ionospheric slab thickness model of the Earth\u2019s ionosphere","volume":"11","author":"Jakowski","year":"2021","journal-title":"J. Space Weather Space Clim."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1241","DOI":"10.5194\/angeo-31-1241-2013","article-title":"Reconstruction of F2 layer peak electron density based on operational vertical total electron content maps","volume":"31","author":"Gerzen","year":"2013","journal-title":"Ann. Geophys."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Fr\u03ccn, A., Galkin, I., Krankowski, A., Bilitza, D., Hern\u00e1ndez-Pajares, M., Reinisch, B., Li, Z., Kotulak, K., Zakharenkova, I., and Cherniak, I. (2020). Towards Cooperative Global Mapping of the Ionosphere: Fusion Feasibility for IGS and IRI with Global Climate VTEC Maps. Remote Sens., 12.","DOI":"10.3390\/rs12213531"},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Galkin, I., Fr\u03ccn, A., Reinisch, B., Hern\u00e1ndez-Pajares, M., Krankowski, A., Nava, B., Bilitza, D., Kotulak, K., Flisek, P., and Li, Z. (2022). Global monitoring of ionospheric weather by GIRO and GNSS data fusion. Atmosphere, 13.","DOI":"10.3390\/atmos13030371"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1864","DOI":"10.1016\/j.jastp.2007.07.008","article-title":"Ionospheric slab thickness and its seasonal variations observed by GPS","volume":"69","author":"Jin","year":"2007","journal-title":"J. Atmos. Sol. Terr. Phys."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"124","DOI":"10.1007\/s00190-021-01577-7","article-title":"Mid-latitude climatology of the ionospheric equivalent slab thickness over two solar cycles","volume":"95","author":"Pignalberi","year":"2021","journal-title":"J. Geod."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"25","DOI":"10.5194\/angeo-22-25-2004","article-title":"Climatology of ionospheric slab thickness","volume":"22","author":"Jayachandran","year":"2004","journal-title":"Ann. Geophys."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1295","DOI":"10.1016\/j.asr.2009.07.010","article-title":"Ionospheric slab thickness\u2014Analysis, modelling and monitoring","volume":"44","author":"Stankov","year":"2009","journal-title":"Adv. Space Res."},{"key":"ref_18","first-page":"92","article-title":"Equivalent ionospheric slab thickness of the ionosphere over Europe as an indicator of long-term temperature changes in the thermosphere","volume":"163","author":"Jakowski","year":"2017","journal-title":"J. Atmos. Terr. Phys."},{"key":"ref_19","first-page":"929","article-title":"Measurement of Total Electron Content and the Equivalent ionospheric slab thickness of the Mid latitude Ionosphere","volume":"69","author":"Bhonsle","year":"1965","journal-title":"Radio Sci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"5517","DOI":"10.1029\/JA088iA07p05517","article-title":"Some results of ionospheric slab thickness observations at Lunping","volume":"88","author":"Huang","year":"1983","journal-title":"J. Geophys. Res."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"997","DOI":"10.1029\/91RS00831","article-title":"Ionospheric slab thickness in middle and low latitudes","volume":"26","author":"Davies","year":"1991","journal-title":"Radio Sci."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"429","DOI":"10.1029\/90RS02624","article-title":"Ionospheric equivalent ionospheric slab thickness and its modeling applications","volume":"26","author":"Fox","year":"1991","journal-title":"Radio Sci."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"839","DOI":"10.1016\/j.jastp.2011.02.002","article-title":"Analysis of the ionospheric equivalent ionospheric slab thickness based on ground-based GPS\/TEC and GPS\/COSMIC RO","volume":"73","author":"Guo","year":"2011","journal-title":"J. Atmos. Sol. Terr. Phys."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"867","DOI":"10.1002\/2015JA021964","article-title":"A global picture of ionospheric slab thickness derived from GIM TEC and COSMIC radio occultation observations","volume":"121","author":"Huang","year":"2016","journal-title":"J. Geophys. Res. Space Phys."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1357","DOI":"10.1016\/0021-9169(76)90146-X","article-title":"Dependence of ionospheric slab thickness on geomagnetic activity","volume":"38","author":"Kersley","year":"1976","journal-title":"J. Atmos. Terr. Phys."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"1635","DOI":"10.5194\/angeo-29-1635-2011","article-title":"Study of TEC, slab thickness and neutral temperature of the thermosphere in the Indian low latitude sector","volume":"29","author":"Venkatesh","year":"2011","journal-title":"Ann. Geophys."},{"key":"ref_27","unstructured":"Minakoshi, H., and Nishimuta, I. (1994, January 11\u201315). Ionospheric electron content and equivalent ionospheric slab thickness at lower mid-latitudes in the Japanese zone. Proceedings of the Beacon Satellite Symposium (IBSS), Wales, UK."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"862","DOI":"10.1016\/j.asr.2003.08.009","article-title":"Latitudinal variation of slab thickness","volume":"33","author":"Gulyaeva","year":"2004","journal-title":"Adv. Space Res."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1311","DOI":"10.5194\/angeo-33-1311-2015","article-title":"Climatology of the ionospheric slab thickness along the longitude of 120\u00b0 E in China and its adjacent region during the solar minimum years of 2007\u20132009","volume":"33","author":"Huang","year":"2015","journal-title":"Ann. Geophys."},{"key":"ref_30","first-page":"238","article-title":"Ionospheric slab thickness during geomagnetic storm","volume":"7","author":"Balan","year":"1978","journal-title":"Indian J. Radio Space Phys."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1307","DOI":"10.1016\/j.jastp.2005.07.006","article-title":"Night-day imprints of ionospheric slab thickness during geomagnetic storm","volume":"67","author":"Gulyaeva","year":"2005","journal-title":"J. Atmos. Sol. Terr. Phys."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"528","DOI":"10.1016\/j.jastp.2010.02.003","article-title":"Comparison of ionospheric equivalent slab thickness with bottomside digisonde profile over Wuhan","volume":"72","author":"Chuo","year":"2010","journal-title":"J. Atmos. Sol. Terr. Phys."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1016\/j.jastp.2018.08.002","article-title":"Ionospheric slab thickness investigation on slab-thickness and B0 over an equatorial station in Africa and comparison with IRI model","volume":"179","author":"Odeyemi","year":"2018","journal-title":"J. Atmos. Sol. Terr. Phys."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Zhang, Y., Wu, Z., Feng, J., Xu, T., Deng, Z., Ou, M., Xiong, W., and Zhen, W. (2021). Statistical study of ionospheric equivalent slab thickness at Guam magnetic equatorial location. Remote Sens., 13.","DOI":"10.3390\/rs13245175"},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Feng, J., Zhang, Y., Xu, N., Chen, B., Xu, T., Wu, Z., Deng, Z., Liu, Y., Wang, Z., and Zhou, Y. (2022). Statistical study of ionospheric equivalent slab thickness at Yakutsk high-latitude station. Remote Sens., 14.","DOI":"10.3390\/rs14215309"},{"key":"ref_36","first-page":"291","article-title":"A statistical study and modeling of the ionospheric TEC and the slab thickness with observations at Xinxiang, China","volume":"13","author":"Wu","year":"1998","journal-title":"Chin. J. Radio Sci."},{"key":"ref_37","first-page":"113","article-title":"A study of ionospheric slab thickness characteristics at Qingdao based on the GPS observation","volume":"44","author":"Zhou","year":"2019","journal-title":"GNSS World China"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"409","DOI":"10.1007\/s00190-016-0972-z","article-title":"Performance evaluation of GNSS-tec ionospheric slab thickness estimation techniques at the grid point in middle and low latitudes during different geomagnetic conditions","volume":"91","author":"Abe","year":"2017","journal-title":"J. Geodesy"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1328","DOI":"10.1029\/2017RS006499","article-title":"Reconstruction of storm-time total electron content using ionospheric tomography and artificial neural networks: A comparative study over the African region","volume":"53","author":"Uwamahoro","year":"2018","journal-title":"Radio Sci."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"RS5019","DOI":"10.1029\/2011RS004722","article-title":"Statistics of total electron content depletions observed over the South American continent for the year 2008","volume":"46","author":"Seemala","year":"2011","journal-title":"Radio Sci."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"1509","DOI":"10.1007\/s11600-021-00618-1","article-title":"Performance analysis of IRI-2016 model TEC predictions over Northern and Southern Hemispheric IGS stations during descending phase of solar cycle 24","volume":"69","author":"Sivavaraprasad","year":"2021","journal-title":"Acta Geophys."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"536","DOI":"10.1002\/2015SW001218","article-title":"Statistical analysis of the ionospheric response during geomagnetic storm conditions over South Africa using ionosonde and GPS data","volume":"13","author":"Matamba","year":"2015","journal-title":"Space Weather"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"377","DOI":"10.5047\/eps.2011.03.001","article-title":"Global ionospheric radio observatory (GIRO)","volume":"63","author":"Reinisch","year":"2011","journal-title":"Earth Planets Space"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"1385","DOI":"10.1016\/S1364-6826(98)00062-5","article-title":"How the thermospheric circulation affects the ionosphere F2-layer","volume":"60","author":"Rishbeth","year":"1998","journal-title":"J. Atmos. Terr. Phys."},{"key":"ref_45","first-page":"738","article-title":"The effect of interhemispheric coupling on nighttime enhancements in ionospheric total electron content during winter at solar minimum","volume":"9","author":"Bailey","year":"1991","journal-title":"Ann. Geophys."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"603","DOI":"10.1016\/0032-0633(94)00115-8","article-title":"About the nature of the Night-time Winter Anomaly effect (NWA) in the F-region of the ionosphere","volume":"43","author":"Jakowski","year":"1995","journal-title":"Planet. Space Sci."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"563","DOI":"10.1023\/A:1005107532631","article-title":"Ionospheric storms\u2014A review","volume":"88","author":"Buonsanto","year":"1999","journal-title":"Space Sci. Rev."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"335","DOI":"10.1029\/2005RG000193","article-title":"Storms in the ionosphere: Patterns and processes for total electron content","volume":"44","author":"Mendillo","year":"2006","journal-title":"Rev. Geophys."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"3893","DOI":"10.1029\/93JA02015","article-title":"Response of the thermosphere and ionosphere to geomagnetic storm","volume":"99","author":"Codrescu","year":"1994","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"1202","DOI":"10.1007\/s11434-010-4226-9","article-title":"Solar activity effects of the ionosphere: A brief review","volume":"56","author":"Liu","year":"2011","journal-title":"Chin. Sci. Bull."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"843","DOI":"10.1029\/RS006i010p00843","article-title":"Observations of F -region Vertical Velocities at Millstone Hill 2. Evidence for Fluxes into and Out of the Protonosphere","volume":"6","author":"Evans","year":"1971","journal-title":"Radio Sci."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"1461","DOI":"10.1016\/0032-0633(75)90001-X","article-title":"A study of F2 region daytime vertical ionization fluxes at Millstone Hill during 1969","volume":"23","author":"Evans","year":"1975","journal-title":"Planet Space Sci."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"967","DOI":"10.1016\/j.jastp.2009.03.027","article-title":"Field-aligned plasma diffusive fluxes in the topside ionosphere from radio occultation measurements by CHAMP","volume":"71","author":"Chen","year":"2009","journal-title":"J. Atmos. Sol-Terr. Phys."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"677","DOI":"10.1016\/j.asr.2012.06.002","article-title":"Behavior of the equivalent slab thickness over three European stations","volume":"51","author":"Mosert","year":"2013","journal-title":"Adv. Space Res."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1029\/2003RS002868","article-title":"Comparison of ionospheric ionization measurements over Athens using ground ionosonde and GPS-derived TEC values","volume":"38","author":"Belehaki","year":"2003","journal-title":"Radio Sci."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"2030","DOI":"10.1016\/j.asr.2015.05.045","article-title":"A case study of ionospheric storm effects in the Chinese sector during the October 2013 geomagnetic storm","volume":"56","author":"Mao","year":"2015","journal-title":"Adv. Space Res."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"767","DOI":"10.1016\/0021-9169(78)90028-4","article-title":"Field-aligned and field-perpendicular velocities in the ionospheric F2 layer","volume":"40","author":"Rishbeth","year":"1978","journal-title":"J. Atmos. Terr. Phys."},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"10","DOI":"10.1002\/2016JA022959","article-title":"Contrasting behavior of the F2 peak and the topside ionosphere in response to the 2 October 2013 geomagnetic storm","volume":"121","author":"Lei","year":"2016","journal-title":"J. Geophys. Res. Space Phys."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/15\/9\/2229\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T19:21:30Z","timestamp":1760124090000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/15\/9\/2229"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,4,23]]},"references-count":58,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2023,5]]}},"alternative-id":["rs15092229"],"URL":"https:\/\/doi.org\/10.3390\/rs15092229","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2023,4,23]]}}}