scholarly journals Estimate of aDregion ionospheric electron density profile from MF radio wave observations by the S-310-37 rocket

Radio Science ◽  
2016 ◽  
Vol 51 (1) ◽  
pp. 40-46
Author(s):  
Y. Ashihara ◽  
K. Ishisaka ◽  
T. Miyake
Keyword(s):  
Radio Wave ◽  
Electron Density ◽  
Density Profile ◽  
Electron Density Profile ◽  
Ionospheric Electron Density

scholarly journals Ionospheric E–F valley observed by a sounding rocket at the low-latitude station Hainan

2013 ◽  
Vol 31 (8) ◽  
pp. 1459-1462 ◽  
Author(s):  
J. K. Shi ◽  
Z. Wang ◽  
K. Torkar ◽  
M. Friedrich ◽  
X. Wang ◽  
...  
Keyword(s):  
Electron Density ◽  
Density Profile ◽  
Physical Mechanism ◽  
East Asian ◽  
Electron Density Profile ◽  
Sounding Rocket ◽  
Low Latitude ◽  
Ionospheric Electron Density ◽  
Simultaneous Observation ◽  
Latitude Region

Abstract. According to the sounding rocket experiment conducted at Hainan ionospheric observatory (19.5° N, 109.1° E), a valley between the E layer and F layer in the ionospheric electron density profile is observed and presented. The sounding rocket was launched in the morning (06:15 LT) on 7 May 2011, and the observed electron density profile outside the valley agrees with the simultaneous observation by the DPS-4 digisonde at the same station. The width of the observed valley was about 42 km, the depth almost 50%, and the altitude of the electron density minimum 123.5 km. This is the first observation of the E–F valley in the low-latitude region in the East Asian sector. The results are also compared with models, and the physical mechanism of the observed valley is discussed in this paper.

Determination of the Ionospheric Electron Density Profile from FUV Remote Sensing Measurements

2013 ◽  
Vol 56 (2) ◽  
pp. 109-116
Author(s):  
WANG Jing ◽  
TANG Yi ◽  
ZHANG Zhi-Ge ◽  
ZHENG Xu-Li ◽  
NI Guo-Qiang
Keyword(s):  
Remote Sensing ◽  
Electron Density ◽  
Density Profile ◽  
Electron Density Profile ◽  
Ionospheric Electron Density

scholarly journals Extraction of solar and thermospheric information from the ionospheric electron density profile

2001 ◽  
Vol 106 (A7) ◽  
pp. 12821-12836 ◽  
Author(s):  
Shun-Rong Zhang ◽  
William L. Oliver ◽  
Shoichiro Fukao ◽  
Seiji Kawamura
Keyword(s):  
Electron Density ◽  
Density Profile ◽  
Electron Density Profile ◽  
Ionospheric Electron Density

scholarly journals On the determination of ionospheric electron density profiles using multi-frequency riometry

2021 ◽  
Author(s):  
Derek McKay ◽  
Juha Vierinen ◽  
Antti Kero ◽  
Noora Partamies
Keyword(s):  
Radio Wave ◽  
Electron Density ◽  
Density Profile ◽  
Electron Density Profile ◽  
Cosmic Radio ◽  
Density Profiles ◽  
Wave Absorption ◽  
Altitude Profile ◽  
Radio Wave Absorption ◽  
Electron Density Profiles

Abstract. Radio wave absorption in the ionosphere is a function of electron density, collision frequency, radio wave polarisation, magnetic field and radio wave frequency. Several studies have used multi-frequency measurements of cosmic radio noise absorption to determine electron density profiles. Using the framework of statistical inverse problems, we investigated if an electron density altitude profile can be determined by using multi-frequency, dual-polarisation measurements. It was found that the altitude profile cannot be uniquely determined from a complete measurement of radio wave absorption for all frequencies and two polarisation modes. This implies that accurate electron density profile measurements cannot be ascertained using multi-frequency riometer data alone, but that the reconstruction requires a strong additional a priori assumption of the electron density profile, such as a parameterised model for the ionisation source. Nevertheless, the spectral index of the absorption could be used to determine if there is a significant component of hard precipitation that ionises the lower part of the D region, but it is not possible to infer the altitude distribution uniquely with this technique alone.

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