scholarly journals Predicted and observed characteristics of small-scale field-aligned irregularities generated in the F-region by low power HF heating

2002 ◽  
Vol 20 (5) ◽  
pp. 647-653 ◽  
Author(s):  
E. Kolesnikova ◽  
T. R. Robinson ◽  
J. A. Davies
Keyword(s):  
Low Power ◽  
Decay Rate ◽  
Parametric Instability ◽  
Small Scale ◽  
F Region ◽  
Scale Field ◽  
Thermal Parametric Instability ◽  
Hf Heating ◽  
Heated Volume ◽  
Field Aligned Irregularities

Abstract. Simultaneous HF scattering from the different regions of the heated volume is used to investigate characteristics of the small-scale field-aligned irregularities in the F-region. Time of growth, decay rate and saturation level for different pump powers are deduced from the observations and are compared with their behaviour predicted by the thermal parametric instability model. As a result, the estimates of the density and of the temperature modifications inside of the irregularities are obtained.Key words. Ionosphere (ionospheric irregularities)

Artificial Small-scale Field-aligned Irregularities in the High Latitude Ionospheric F-region

2018 ◽  
Author(s):  
Nataly Blagoveshchenskaya ◽  
Tatiana Borisova ◽  
Alexey Kalishin ◽  
Timothy Yeoman
Keyword(s):  
High Latitude ◽  
Small Scale ◽  
F Region ◽  
Scale Field ◽  
Field Aligned Irregularities

Artificial small-scale field-aligned irregularities in the high latitude F region of the ionosphere induced by an X-mode HF heater wave

2011 ◽  
Vol 38 (8) ◽  
pp. n/a-n/a ◽  
Author(s):  
N. F. Blagoveshchenskaya ◽  
T. D. Borisova ◽  
T. K. Yeoman ◽  
M. T. Rietveld ◽  
I. M. Ivanova ◽  
...  
Keyword(s):  
High Latitude ◽  
Small Scale ◽  
F Region ◽  
Scale Field ◽  
Field Aligned Irregularities

scholarly journals Comparison of the orientation of small-scale electron density irregularities and F region plasma flow direction

2000 ◽  
Vol 18 (8) ◽  
pp. 918-926 ◽  
Author(s):  
E. D. Tereshchenko ◽  
B. Z. Khudukon ◽  
M. O. Kozlova ◽  
O. V. Evstafiev ◽  
T. Nygrén ◽  
...  
Keyword(s):  
Plasma Flow ◽  
Flow Direction ◽  
Small Scale ◽  
Incoherent Scatter ◽  
F Region ◽  
Anisotropy Parameters ◽  
Electron Density Irregularities ◽  
Region Plasma ◽  
Good Agreement ◽  
Field Aligned Irregularities

Abstract. Results are shown from an experimental campaign where satellite scintillation was observed at three sites at high latitudes and, simultaneously, the F region plasma flow was measured by the nearby EISCAT incoherent scatter radar. The anisotropy parameters of field-aligned irregularities are determined from amplitude scintillation using a method based on the variance of the relative logarithmic amplitude. The orientation of the anisotropy in a plane perpendicular to the geomagnetic field is compared with the direction of F region plasma flow. The results indicate that in most cases a good agreement between the two directions is obtained.Key words: Ionosphere (auroral ionosphere; ionospheric irregularities)

Density disturbance of small-scale field-aligned irregularities in the ionosphere heating experiments

2018 ◽  
Vol 20 (12) ◽  
pp. 125001
Author(s):  
Xiang WANG ◽  
Chen ZHOU ◽  
Moran LIU ◽  
Binbin NI ◽  
Zhengyu ZHAO
Keyword(s):  
Small Scale ◽  
Scale Field ◽  
Density Disturbance ◽  
Ionosphere Heating ◽  
Field Aligned Irregularities
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