Results 1 to 10 of about 853 (193)
Unusual Enhancements of NmF2 in Anyang Ionosonde Data [PDF]
Journal of Astronomy and Space Sciences, 2013 Sudden enhancements of daytime NmF2 appeared in Anyang ionosonde data during summer seasons in 2006-2007. In order to investigate the causes of this unusual enhancement, we compared Anyang NmF2’s with the total electron contents (GPS TECs) observed at ...
Yongha Kim, Young-Sil Kwak
exaly +5 more sources
The factors affecting noontime ionospheric NmF2 equinoctial asymmetry over mid-latitude regions [PDF]
Scientific ReportsMid-latitude semiannual noontime NmF2 peaks were analyzed at four North Hemisphere (Boulder, Rome, Wakkanai, Juliusruh) and two South Hemisphere (Hobart, Port Stanley) stations.
Andrey V. Mikhailov, Loredana Perrone
doaj +5 more sources
B2 Thickness Parameter Response to Equinoctial Geomagnetic Storms [PDF]
Sensors, 2021 The thickness parameters that most empirical models use are generally defined by empirical relations related to ionogram characteristics. This is the case with the NeQuick model that uses an inflection point below the F2 layer peak to define a thickness ...
Yenca Migoya-Orué +7 more
doaj +2 more sources
Universe, 2022 We used ground-based ionosonde observations at Ganzi (31.2° N, 100.4° E) to validate the COSMIC measurement in the middle latitude region of China during low solar activity.
Liangchen Hu +3 more
doaj +2 more sources
Performance evaluation of IRI-Plas 2017 model with ionosonde data measurements of ionospheric parameters [PDF]
Heliyon, 2023 This study presents an evaluation of the performance of the International Reference Ionosphere Model augmented with the Plasmasphere (IRI Plas 2017) from the Addis Ababa Ionosonde Station, Ethiopia, for measuring ionospheric parameters at geographic (9 ...
Lake Endeshaw, Alene Seyoum
doaj +2 more sources
Diurnal variation of NmF2 associated with ExB drift at the equator during solar maxima [PDF]
Geofísica Internacional, 2004 Se analiza la variación diurna de la densidad máxima de electrones en la ionosfera, NmF2, medida en cinco estaciones, para diferentes estaciones del año, máxima actividad solar y baja actividad magnética (Kp ≤ 3) en función de la velocidad de drift ExB ...
Teresita Heredia, Ana G. Elías
doaj +4 more sources
Reconstruction of the gastric cancer microenvironment after neoadjuvant chemotherapy by longitudinal single-cell sequencing [PDF]
Journal of Translational Medicine, 2022 Background Little is known on the tumor microenvironment (TME) response after neoadjuvant chemotherapy (NACT) in gastric cancer on the molecular level. Methods Here, we profiled 33,589 cell transcriptomes in 14 samples from 11 gastric cancer patients (4 ...
Yingtai Chen +16 more
doaj +2 more sources
Atmosphere, 2023 We performed an analysis of year-to-year variations in the characteristics of the upper neutral atmosphere and the ionosphere over Eastern Siberia. The mesopause temperature (Tm) obtained from the spectrometric observations of the OH(6-2) emission and ...
Irina V. Medvedeva +1 more
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Equinoctial transitions in the ionosphere and thermosphere [PDF]
Annales Geophysicae, 2001 Equinoctial summer/winter transitions in the parameters of the F2-region are analyzed using ground-based ionosonde and incoherent scatter observations.
A. V. Mikhailov, K. Schlegel
doaj +1 more source
A 3D Empirical Model of Electron Density Based on CSES Radio Occultation Measurements
Space Weather, 2022 China Seismo‐Electromagnetic Satellite (CSES) was successfully launched in February 2018. About 280 thousand ionospheric radio occultation (RO) electron density profiles (EDP) have been accumulated till the end of 2020.
He Huang +7 more
doaj +1 more source