HF radio propagation at high latitudes under quiet and disturbed geomagnetic conditions

2000 ◽  
Author(s):  
B. Jacobsen
Keyword(s):  
Radio Propagation ◽  
High Latitudes ◽  
Hf Radio Propagation

scholarly journals Study on the strength loss of Multi-hop HF Radio Propagation

2018 ◽  
Vol 175 ◽  
pp. 03012 ◽  
Author(s):  
Lingxiao Liu ◽  
Tian Lu ◽  
Mingxue Gong ◽  
Wuyu Zhang
Keyword(s):  
High Frequency ◽  
Strength Loss ◽  
Radio Propagation ◽  
Radio Waves ◽  
Long Distance ◽  
Propagation Process ◽  
Distance Information ◽  
Rugged Terrain ◽  
Radio Signals ◽  
Hf Radio Propagation

The reflections of high frequency (HF) radio waves between ionosphere and earth’s surface make long-distance information transmission possible. In this paper, the propagation process of radio signals was analyzed and the ionosphere was simplified. Considering the strength loss of signals that occurs in the travelling process and at the reflection points, two pairs of differential equations and integral equations were established to simulate the strength variations of HF radio waves and noises. A different equation of SNR was also developed, which utilized the failure threshold of signal-noise-ratio (SNR) as a criterion to evaluate the effectiveness of signals. Meanwhile, the pace of SNR attenuation was simulated when reflections happens on calm ocean, turbulent ocean, smooth terrain and rugged terrain.

scholarly journals Aspects of HF radio propagation

2009 ◽  
Vol 52 (3-4) ◽  
Author(s):  
E. Michael Warrington ◽  
Alain Bourdillon ◽  
Eulalia Benito ◽  
Cesidio Bianchi ◽  
Jean-Philippe Monilié ◽  
...  
Keyword(s):  
Radio Propagation ◽  
Hf Radio Propagation

scholarly journals A Mathematical Model of Multi-Hop HF Radio Propagation

2018 ◽  
Vol 09 (06) ◽  
pp. 779-788
Author(s):  
Yaru Chen ◽  
Lu Han ◽  
Junrun Huang ◽  
Yufeng Gui
Keyword(s):  
Mathematical Model ◽  
Radio Propagation ◽  
Hf Radio Propagation

HF radio propagation through the auroral oval during substorms

2005 ◽  
Vol 67 (16) ◽  
pp. 1618-1625 ◽  
Author(s):  
D.V. Blagoveshchensky ◽  
V.M. Vystavnoi ◽  
M.A. Sergeeva
Keyword(s):  
Auroral Oval ◽  
Radio Propagation ◽  
Hf Radio Propagation
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