Experimental Study of Rain Attenuation over Line-of-Sight Link at 19.4 GHz in Tropical Region

2007 ◽  
Author(s):  
Ashok Kumar ◽  
Sarita Sharma
Keyword(s):  
Experimental Study ◽  
Rain Attenuation ◽  
Line Of Sight ◽  
Tropical Region

Prediction on operating range of passive troposcatter detection system

2018 ◽  
Vol 11 (1) ◽  
pp. 22-26 ◽  
Author(s):  
Zan Liu ◽  
Xihong Chen
Keyword(s):  
Electromagnetic Wave ◽  
Analytical Study ◽  
Detection System ◽  
Rain Attenuation ◽  
Propagation Loss ◽  
Line Of Sight ◽  
Time Model ◽  
Operating Range ◽  
Statistic Model ◽  
Loss Models

AbstractElectromagnetic wave of enemy radar propagated by troposcatter is a valuable candidate for beyond line-of-sight detection. There is no analytical study considering the operating range of passive troposcatter detection system. In this paper, we study the way to predict the operating range, which is dominated by propagation loss. The key propagation loss models including statistic model and real-time model are analyzed. During deducing the latter loss model, Hopfield model is introduced to precisely describe the tropospheric refractivity. Meanwhile, rain attenuation is also taken into consideration. Several examples demonstrate the feasibility of predicting operating range through the proposed method.

scholarly journals RAIN ATTENUATION FOR 5G NETWORK IN TROPICAL REGION (MALAYSIA) FOR TERRESTRIAL LINK

2020 ◽  
Vol 90 ◽  
pp. 99-104
Author(s):  
Kesavan Ulaganathen ◽  
Tharek Bin Abdul Rahman ◽  
Md. Rafiqul Islam ◽  
Khaizuran Abdullah
Keyword(s):  
Rain Attenuation ◽  
Tropical Region ◽  
5G Network

scholarly journals Prediction of Rain Attenuation and Impact of Rain in Wave Propagation at Microwave Frequency for Tropical Region (Uttarakhand, India)

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Mukesh Chandra Kestwal ◽  
Sumit Joshi ◽  
Lalit Singh Garia
Keyword(s):  
Microwave Frequency ◽  
Exponential Model ◽  
Rain Attenuation ◽  
Tropical Region ◽  
Site Visit ◽  
Classical Approach ◽  
Atmospheric Attenuation ◽  
Tropical Regions ◽  
Attenuation Level ◽  
Rainfall Attenuation

The most classical approach of determining rain attenuation for radio-wave frequency has been to theoretically determine the specific attenuation. At frequency over 10 GHz, rain and precipitation can influence the attenuation a lot; the effect of atmospheric attenuation between the source and destination over wireless communication is of major concern and a proper site visit and proper method are required to control the attenuation level so that the performance can be increased. In this paper exponential model has been used to determine the attenuation level for k-region (India) which can be used for region having similar condition. The analyzed predicted attenuation data have been compared with ITU-R measured rain attenuation, and the results will provide useful estimation of rainfall attenuation on microwave links in tropical regions that have similar conditions as (Almora) Uttarakhand region.

Rain Height Statistics from Spaceborne Radar for Satellite Communication in Malaysia

2012 ◽  
Vol 58 (1) ◽  
Author(s):  
Nor Azlan Mohd Aris
Keyword(s):  
Satellite Communication ◽  
Tropical Rainfall Measuring Mission ◽  
Rain Attenuation ◽  
Peninsular Malaysia ◽  
Equatorial Region ◽  
Radiowave Propagation ◽  
Tropical Region ◽  
Propagation Modeling ◽  
Bright Band ◽  
Communication Links

Tropical and equatorial region exhibit significantly higher rainfall compared to the temperate region leading to higher attenuation for satellite communication links. One of the issues in radiowave propagation modeling is the different precipitation structures which play an important role in the estimation of rain fade. However, few results on rain height over Malaysian equatorial stations have been presented so far. To this aim, an investigation on rain height derived from Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) is carried out. In this paper, the bright–band heights (hBB) have been analyzed to obtain monthly average values of the rain height (hR). TRMM PR is one of the most powerful instruments able to observe vertical profiles of rainfall. The analysis covers stratiform events around peninsular Malaysia. It is well known that hBB exists slightly below the 0°C isotherm height (h0) and this may lead to the estimation of rain height (hR). The obtained results on rain height are then compared with radiosonde observations and ITU–R Recommendation P.839–3. It is found that the bright–band height (hBB) appears to vary throughout the year and will mostly lie between 4192 m and 4593 m above mean sea level. The results suggest that by carefully consider the physical information of rain height derived from the various local databases should lead to substantial improvements in the rain attenuation prediction accuracy for equatorial and tropical region.

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