A Data Assimilated Regional Ionosphere Model Using the Total Electron Content from the Korean GPS Network

2018 ◽  
Vol 72 (7) ◽  
pp. 826-834 ◽  
Author(s):  
Chalachew Kindie Mengist ◽  
Yong Ha Kim ◽  
Nicholas Ssessanga ◽  
Jeong-Heon Kim
Keyword(s):  
Total Electron Content ◽  
Electron Content ◽  
Total Electron ◽  
Ionosphere Model ◽  
Gps Network

scholarly journals Influence of the Ionosphere Model on the Solution of a VLBI Geodetic Experiment

1988 ◽  
Vol 129 ◽  
pp. 551-552
Author(s):  
G. Petit ◽  
J. F. Lestrade ◽  
C. Boucher ◽  
F. Biraud ◽  
A. Rius ◽  
...  
Keyword(s):  
South America ◽  
Total Electron Content ◽  
Dual Band ◽  
Single Frequency ◽  
Electron Content ◽  
Critical Aspect ◽  
Total Electron ◽  
Geodetic Vlbi ◽  
Ionosphere Model ◽  
First Time

The GRIG-2 geodetic VLBI experiment was conducted in 1985, linking for the first time South America, Europe and Africa. At the single frequency band of 1.66 GHz which was used, the monitoring of the ionosphere is a critical aspect and several predictions of Total Electron Content (TEC) were used. One of them is derived from dual band Doppler observations of TRANSIT satellites, which were simultaneously conducted. The influence of these models on the solution is presented, with comparisons with other VLBI solutions. Decimetric accuracy has been achieved.

scholarly journals A new technique for mapping of total electron content using GPS network in Japan

2002 ◽  
Vol 54 (1) ◽  
pp. 63-70 ◽  
Author(s):  
Y. Otsuka ◽  
T. Ogawa ◽  
A. Saito ◽  
T. Tsugawa ◽  
S. Fukao ◽  
...  
Keyword(s):  
Total Electron Content ◽  
New Technique ◽  
Electron Content ◽  
Total Electron ◽  
Gps Network ◽  
A New Technique

scholarly journals Spatio-temporal interpolation of total electron content using a GPS network

Radio Science ◽  
2013 ◽  
Vol 48 (3) ◽  
pp. 302-309 ◽  
Author(s):  
M. N. Deviren ◽  
F. Arikan ◽  
O. Arikan
Keyword(s):  
Total Electron Content ◽  
Electron Content ◽  
Total Electron ◽  
Gps Network ◽  
Temporal Interpolation ◽  
Spatio Temporal

scholarly journals MoMo: a new empirical model of the Mars ionospheric total electron content based on Mars Express MARSIS data

2019 ◽  
Vol 9 ◽  
pp. A36 ◽  
Author(s):  
Nicolas Bergeot ◽  
Olivier Witasse ◽  
Sébastien Le Maistre ◽  
Pierre-Louis Blelly ◽  
Wlodek Kofman ◽  
...  
Keyword(s):  
Total Electron Content ◽  
Empirical Model ◽  
Density Variation ◽  
Electron Content ◽  
Martian Surface ◽  
Total Electron ◽  
Mars Express ◽  
Radio Science ◽  
Ionosphere Model ◽  
The Impact

Aims: Several scientific landers and rovers have reached the Martian surface since the 1970s. Communication between the asset (i.e., lander or rover) and Mars orbiters or Earth antennas uses radio signals in UHF to X-band frequencies passing through the Mars’ ionosphere. It is consequently necessary to take into account electron density variation in the Mars’ ionosphere to correct the refraction of the signal transmitted. Methods: We developed a new empirical model of the Mars’ ionosphere called MoMo. It is based on the large database of Total Electron Content (TEC) derived from the subsurface mode of the Mars Express MARSIS radar. The model provides vertical TEC as a function of solar zenith angle, solar activity, solar longitude and location. For validation, the model is compared with Mars Express radio occultation data as well as with the numerical model IPIM (IRAP Plasmasphere-Ionosphere Model). Results: We discussed the output of the model in terms of climatology behaviour of the Mars’ ionosphere. The output of MoMo is then uses to quantify the impact of the Martian ionosphere for radio-science experiments. From our results, the effect is of the order of 10−3 mm s−1 in Doppler observables especially around sunrise and sunset. Consequently, this new model could be used to support the data analysis of any radio-science experiment and especially for present InSight RISE and futur ExoMars LARA instruments aiming at better understand the deep-interior of Mars.

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