The dynamics of ionosphere disturbance level during 94-04 and its response to a global leap of geophysical parameters at 1997

2017 ◽  
Author(s):  
Ilya Edemskiy
Keyword(s):  
Ionosphere Disturbance

Observation and simulation of the ionosphere disturbance waves triggered by rocket exhausts

2017 ◽  
Vol 122 (8) ◽  
pp. 8868-8882 ◽  
Author(s):  
Charles C. H. Lin ◽  
Chia-Hung Chen ◽  
Mitsuru Matsumura ◽  
Jia-Ting Lin ◽  
Yoshihiro Kakinami
Keyword(s):  
Disturbance Waves ◽  
Ionosphere Disturbance

scholarly journals Ionosphere disturbance during cosmodrome “Vostochniy” launches

2018 ◽  
Vol 62 ◽  
pp. 01008
Author(s):  
Zinaida F. Dumbrava ◽  
Vladimir P. Sivokon ◽  
Yuriy A. Teslyuk ◽  
Sergey Y. Khomutov
Keyword(s):  
Acoustic Waves ◽  
Ionospheric Plasma ◽  
Global Navigation Satellite Systems ◽  
Plasma Properties ◽  
Satellite Systems ◽  
Ground Station ◽  
Ionosphere Disturbance ◽  
Global Navigation Satellite ◽  
Carrier Rocket ◽  
Supersonic Motion

It is known that during spacecraft launches ionospheric plasma properties are modified in the result of impact of shock-acoustic waves generated during carrier rocket supersonic motion. As a rule, investigation of ionospheric plasma variations is carried out by the signals of Global Navigation Satellite Systems GPS/GLONASS that implies ground station network. There is no such a system near the “Vostochniy” cosmodrome that makes it necessary to search for an alternative solution. One of them may be the application of ionosphere vertical and oblique sounding stations. Based on the analysis of such station data, the possibility of evaluation of ionosphere modification during “Vostochniy” cosmodrome launches is shown.

Atmospheric electric field variations and lower ionosphere disturbance during the total solar eclipse of 2010 July 11

2016 ◽  
Vol 58 (10) ◽  
pp. 2052-2056 ◽  
Author(s):  
José C. Tacza ◽  
Jean-Pierre Raulin ◽  
Edith L. Macotela ◽  
Edmundo O. Norabuena ◽  
Germán Fernandez
Keyword(s):  
Electric Field ◽  
Solar Eclipse ◽  
Lower Ionosphere ◽  
Total Solar Eclipse ◽  
Atmospheric Electric Field ◽  
Ionosphere Disturbance

scholarly journals Initial Assessment of Galileo Triple-Frequency Ambiguity Resolution between Reference Stations in the Hong Kong Area

2021 ◽  
Vol 13 (4) ◽  
pp. 778
Author(s):  
Yangyang Li ◽  
Mingxing Shen ◽  
Lei Yang ◽  
Chenlong Deng ◽  
Weiming Tang ◽  
...  
Keyword(s):  
Hong Kong ◽  
Ambiguity Resolution ◽  
Satellite System ◽  
Convergence Time ◽  
Initial Assessment ◽  
Triple Frequency ◽  
Ionosphere Disturbance ◽  
Wide Lane ◽  
Reliability And Robustness ◽  
Global Navigation Satellite

The European Global Navigation Satellite System Galileo is gradually deploying its constellation. In order to provide reliable navigation and position services, the effectiveness and reliability of ambiguity resolution between reference stations is necessary in network real-time kinematic (NRTK). The multifrequency signal of Galileo could much enhance the ambiguity resolution (AR) reliability and robustness. In this study, to exploit full advantage of this, the geometry-free (GF) TCAR and ionospheric-free (IF) triple-carrier ambiguity resolution (TCAR) methods were utilized in solving the ambiguity in the Hong Kong area, which is an ionosphere disturbance active area, and compared with each other. The IF TCAR method was then used to combine multi-systems to improve Galileo E1 AR performance, which is named as the combined IF (CIF) TCAR method. Three experiments were carried out in the Hong Kong area and the results showed that the Galileo-only system could fix ambiguities on all satellite pairs correctly and reliably by the IF TCAR method, while the GF TCAR method showed a weaker performance. The wide-lane (WL) convergence time of the IF TCAR method is improved by about 37.6%. The IF TCAR method with respect to the GF TCAR method could improve the WL accuracy by 21.6% and the E1 accuracy by 72.7%, respectively. Compared with GPS-only TCAR or Galileo-only TCAR, the ambiguity accuracy and the convergence time of the CIF TCAR method, which combines GPS and Galileo, could be improved by about 25.7% and 47.1%, respectively.

A new computerized ionosphere tomography model using the mapping function and an application to the study of seismic-ionosphere disturbance

2016 ◽  
Vol 90 (8) ◽  
pp. 741-755 ◽  
Author(s):  
Jian Kong ◽  
Yibin Yao ◽  
Lei Liu ◽  
Changzhi Zhai ◽  
Zemin Wang
Keyword(s):  
Mapping Function ◽  
Ionosphere Disturbance

Observing Far-Distance Ionosphere Disturbance Effect

2012 ◽  
Vol 241-244 ◽  
pp. 2271-2274
Author(s):  
Guo You Shi ◽  
Ji Xiang Chen ◽  
Jia Xuan Yang
Keyword(s):  
Frequency Shift ◽  
Local Features ◽  
Severe Weather ◽  
Normal Frequency ◽  
Ionosphere Disturbance

Using HF-Doppler detector we have been observed ionosphere disturbance continuously for about 20 years. Firstly, We gave a theoretic explanation to normal frequency-shift records, then using two typical cases we pointed out that in china there exist F2 layer infrasonic disturbance which due to severe weather. Through analyzing their spectrums, we found three remarkable peaks. And comparing with foreign researchers, we indicated that infrasonic disturbances possess local features. Finally, we concluded local features of infrasonic disturbances occurring in our area.

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