Changes in the total electron content and slab thickness of the ionosphere during a magnetic storm in June 1965

1969 ◽  
Vol 31 (1) ◽  
pp. 211-216 ◽  
Author(s):  
G.N. Taylor ◽  
R.D.S. Earnshaw
Keyword(s):  
Magnetic Storm ◽  
Total Electron Content ◽  
Slab Thickness ◽  
Electron Content ◽  
Total Electron

scholarly journals Ionospheric total electron content and slab thickness determined in Australia

Radio Science ◽  
1997 ◽  
Vol 32 (4) ◽  
pp. 1635-1643 ◽  
Author(s):  
A. M. Breed ◽  
G. L. Goodwin ◽  
A-M. Vandenberg ◽  
E. A. Essex ◽  
K. J. W. Lynn ◽  
...  
Keyword(s):  
Total Electron Content ◽  
Slab Thickness ◽  
Electron Content ◽  
Total Electron ◽  
Ionospheric Total Electron Content

GPS satellite measurements: ionospheric slab thickness and total electron content

1995 ◽  
Vol 57 (14) ◽  
pp. 1723-1732 ◽  
Author(s):  
G.L. Goodwin ◽  
J.H. Silby ◽  
K.J.W. Lynn ◽  
A.M. Breed ◽  
E.A. Essex
Keyword(s):  
Total Electron Content ◽  
Slab Thickness ◽  
Electron Content ◽  
Satellite Measurements ◽  
Total Electron

The ionospheric response to perturbation electric fields during the onset phase of geomagnetic storms

1992 ◽  
Vol 70 (7) ◽  
pp. 575-581 ◽  
Author(s):  
N. Jakowski ◽  
A. Jungstand ◽  
K. Schlegel ◽  
H. Kohl ◽  
K. Rinnert
Keyword(s):  
Total Electron Content ◽  
Electric Fields ◽  
Geomagnetic Storms ◽  
Slab Thickness ◽  
Electron Content ◽  
Total Electron ◽  
Total Electron Content Data ◽  
Critical Frequency Fof2 ◽  
Eiscat Radar ◽  
Onset Phase

The generation and propagation of ionospheric storms are studied by analyzing EISCAT radar, and vertical-sounding and total-electron-content data obtained under different geophysical conditions. Both, case studies as well as the average storm pattern of percentage deviations of different ionospheric parameters from their corresponding reference values such as total electron content, F2-layer critical frequency foF2, F2-layer height hmF2, and slab thickness τ indicate the action of a perturbation electric field during the first few hours during the onset phase of geomagnetic storms. Considering the onset phase of the storm on July 28–29, 1987 evidence has been found that high-latitude electric fields may penetrate to lower latitudes before the ring current has developed. In most cases this process is accompanied by a positive phase in the upper ionosphere and F2-layer ionization. Different mechanisms are assumed to be responsible for the daytime and nighttime behaviour, respectively. The negative phase propagates equatorward with velocities in the order of 70–350 m s−1 following a strong heating of the thermosphere and ionosphere due to the auroral electrojet.

scholarly journals Statistical analysis of ionospheric total electron content (TEC): long-term estimation of extreme TEC in Japan

2021 ◽  
Vol 73 (1) ◽  
Author(s):  
Michi Nishioka ◽  
Susumu Saito ◽  
Chihiro Tao ◽  
Daikou Shiota ◽  
Takuya Tsugawa ◽  
...  
Keyword(s):  
Total Electron Content ◽  
Communication Systems ◽  
Extreme Values ◽  
Cumulative Distribution ◽  
Propagation Path ◽  
Slab Thickness ◽  
Electron Content ◽  
Data Set ◽  
Total Electron ◽  
Ionospheric Total Electron Content

AbstractIonospheric total electron content (TEC) is one of the key parameters for users of radio-based systems, such as the Global Navigation Satellite System, high-frequency communication systems, and space-based remote sensing systems, since total ionospheric delay is proportional to TEC through the propagation path. It is important to know extreme TEC values in readiness for hazardous ionospheric conditions. The purpose of this study is to estimate extreme TEC values with occurrences of once per year, 10 years, and hundred years in Japan. In order to estimate the extreme values of TEC, a cumulative distribution function of daily TEC is derived using 22 years of TEC data from 1997 to 2018. The extreme values corresponding to once per year and 10 years are 90 and 110 TECU, respectively, in Tokyo, Japan. On the other hand, the 22-year data set is not sufficient to estimate the once-per-100-year value. Thus, we use the 62-year data set of manually scaled ionosonde data for the critical frequency of the F-layer (foF2) at Kokubunji in Tokyo. First, we study the relationship between TEC and foF2 for 22 years and investigate the slab thickness. Then the result is applied to the statistical distribution of foF2 data for 62 years. In this study, two methods are applied to estimate the extreme TEC value. In the first method, the distribution of slab thickness is artificially inflated to estimate extreme TEC values. In the second method, extreme slab thicknesses are applied to estimate extreme TEC values. The result shows that the once-per-100-year TEC is about 150–190 TECU at Tokyo. The value is also estimated to be 180–230 TECU in Kagoshima and 120–150 TECU in Hokkaido, in the southern and northern parts of Japan, respectively.

scholarly journals GPS-derived total electron content response for the Bastille Day magnetic storm of 2000 at a low mid-latitude station

2005 ◽  
Vol 44 (2) ◽  
pp. 211-218
Author(s):  
E. A. Araujo-Pradere
Keyword(s):  
Magnetic Storm ◽  
Total Electron Content ◽  
Space Environment ◽  
Electron Content ◽  
Total Electron ◽  
Latitude Station

El desarrollo de un modelo empírico para la corrección de la predicción por modelos climatológicos del Contenido Total Electrónico vertical (VTEC), equivalente al modelo STORM para el pico de concentración de la capa F2 (Araujo-Pradere y Fuller-Rowell, 2002, Araujo-Pradere et al., 2002), se encuentra ahora en su etapa inicial en el Space Environment Center (SEC) de NOAA. El programa para la obtención del TEC, el proyecto Win Tec (Anghel y Codrescu, 2002), utiliza los archivos de formato de intercambio independiente del receptor (RINEX) para derivar el TEC vertical a partir del retraso de las señales del Sistema de Posicionamiento Global (GPS). Con un valor máximo del Dst de -287.6 (máximo ap = 400), la tormenta de julio 2000, conocida como la tormenta del Día de la Bastille, ha sido una de las más intensas perturbaciones en el ciclo solar actual. En este trabajo se analiza la respuesta del TEC, obtenido del retardo que sufren el código y la fase de la señal de GPS a su paso por la ionosfera, para la tormenta de julio 2000. Los valores de TEC vertical en la estación receptora ccv3 (Cabo Cañaveral, Florida, latitud 28.46 N, longitud 279.45 E) sufrieron un súbito incremento, más del 250% con respecto a los días tranquilos previos, seguido por un fuerte gradiente negativo, y una lenta recuperación. El cuadro es aun más complejo por la presencia de estos gradientes, responsables por la degradación de la calidad del posicionamiento obtenido por GPS.

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