The characteristics of summer descending sporadic E layer observed with the ionosondes in the China region

2021 ◽  
Author(s):  
LiHui Qiu ◽  
Xiaomin Zuo ◽  
Tao Yu ◽  
Yangyi Sun ◽  
Huixin Liu ◽  
...  
Keyword(s):  
Sporadic E Layer ◽  
Sporadic E ◽  
China Region

A statistical analysis of sporadic E layer occurrence in the midlatitude China region

2017 ◽  
Vol 122 (3) ◽  
pp. 3617-3631 ◽  
Author(s):  
Chen Zhou ◽  
Qiong Tang ◽  
Xiaoxiao Song ◽  
Haiyin Qing ◽  
Yi Liu ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Sporadic E Layer ◽  
Sporadic E ◽  
China Region

scholarly journals Equatorial E Region Electric Fields and Sporadic E Layer Responses to the Recovery Phase of the November 2004 Geomagnetic Storm

2017 ◽  
Vol 122 (12) ◽  
pp. 12,517-12,533 ◽  
Author(s):  
J. Moro ◽  
L. C. A. Resende ◽  
C. M. Denardini ◽  
J. Xu ◽  
I. S. Batista ◽  
...  
Keyword(s):  
Geomagnetic Storm ◽  
Electric Fields ◽  
Recovery Phase ◽  
E Region ◽  
Sporadic E Layer ◽  
Sporadic E

Sporadic E layer formation time

1968 ◽  
Vol 11 (9) ◽  
pp. 756-759
Author(s):  
Yu. A. Ignat'ev
Keyword(s):  
Formation Time ◽  
Layer Formation ◽  
Sporadic E Layer ◽  
Sporadic E

scholarly journals Energetics and structure of the lower E region associated with sporadic E layer

2008 ◽  
Vol 26 (9) ◽  
pp. 2929-2936 ◽  
Author(s):  
K.-I. Oyama ◽  
K. Hibino ◽  
T. Abe ◽  
R. Pfaff ◽  
T. Yokoyama ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Data ◽  
Magnetic Line ◽  
Height Range ◽  
Sounding Rockets ◽  
Main Structure ◽  
Irregular Structures ◽  
E Region ◽  
Sporadic E Layer ◽  
Sporadic E

Abstract. The electron temperature (Te), electron density (Ne), and two components of the electric field were measured from the height of 90 km to 150 km by one of the sounding rockets launched during the SEEK-2 campaign. The rocket went through sporadic E layer (Es) at the height of 102 km–109 km during ascent and 99 km–108 km during decent, respectively. The energy density of thermal electrons calculated from Ne and Te shows the broad maximum in the height range of 100–110 km, and it decreases towards the lower and higher altitudes, which implies that a heat source exists in the height region of 100 km–110 km. A 3-D picture of Es, that was drawn by using Te, Ne, and the electric field data, corresponded to the computer simulation; the main structure of Es is projected to a higher altitude along the magnetic line of force, thus producing irregular structures of Te, Ne and electric field in higher altitude.

scholarly journals Electron temperature in nighttime sporadic E layer at mid-latitude

2008 ◽  
Vol 26 (3) ◽  
pp. 533-541 ◽  
Author(s):  
K.-I. Oyama ◽  
T. Abe ◽  
H. Mori ◽  
J. Y. Liu
Keyword(s):  
Heat Source ◽  
Electron Temperature ◽  
Physical Parameter ◽  
Langmuir Probe ◽  
Present Theory ◽  
Height Range ◽  
Neutral Temperature ◽  
Sporadic E Layer ◽  
Sporadic E ◽  
Parameter Values

Abstract. Electron temperature in the sporadic E layer was measured with a glass-sealed Langmuir probe at a mid-latitude station in Japan in the framework of the SEEK (Sporadic E Experiment over Kyushu)-2 campaign which was conducted in August 2002. Important findings are two fold: (1) electron temperature and electron density vary in the opposite sense in the height range of 100–108 km, and electron temperature in the Es layer is lower than that of ambient plasma, (2) electron temperature in these height ranges is higher than the possible range of neutral temperature. These findings strongly suggest that the heat source that elevates electron temperature much higher than possible neutral temperature exists at around 100 km, and/or that the physical parameter values, which are used in the present theory to calculate electron temperature, are not proper.

scholarly journals Assessing the quality of ionogram interpretation using the HF Doppler technique

2007 ◽  
Vol 25 (4) ◽  
pp. 895-904 ◽  
Author(s):  
D. Buresova ◽  
V. Krasnov ◽  
Ya. Drobzheva ◽  
J. Lastovicka ◽  
J. Chum ◽  
...  
Keyword(s):  
Doppler Shift ◽  
Type System ◽  
High Quality ◽  
Phase Path ◽  
Doppler Data ◽  
Volume Measurements ◽  
Significant Disagreement ◽  
Sporadic E Layer ◽  
Sporadic E

Abstract. The first joint common volume measurements by the Digisonde Portable Sounder (DPS-4) and a new Doppler type system has been run at the Pruhonice ionospheric observatory (49.99° N, 14.54° E) since January 2004. The measurement of the Doppler shift is carried out continuously on a frequency of 3.6 MHz, thus the radio wave is reflected predominantly from the ionospheric F layer. To compare digisonde measurements with the Doppler data, a phase path was calculated from both Doppler and digisonde records. Under stormy conditions and in the case where a sporadic E layer was present, a significant disagreement between both measurements has been found. The discrepancies could be related to the uncertainties of the observational inputs and to the interpretation of the digisonde data. The comparison of the phase paths shows that during geomagnetically quiet days, in the absence of the sporadic E layer, and when high quality ionograms are available and correctly scaled, the electron density N(h) profiles, calculated by the Automatic Real Time Ionogram Scaler with True height algorithm (ARTIST), can be considered reliable.

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