Rain attenuation on earth-satellite links: a prediction method based on point rainfall intensity statistics

1981 ◽  
Vol 36 (1-2) ◽  
pp. 73-77
Author(s):  
Francesco Fedi
Keyword(s):  
Rainfall Intensity ◽  
Prediction Method ◽  
Earth Satellite ◽  
Rain Attenuation ◽  
Satellite Links

scholarly journals Disparities in the Induced Rain Attenuation between Beacon (Narrowband) and Broadband Satellite Links in Tropical Zones

2018 ◽  
Vol 10 (2) ◽  
pp. 687
Author(s):  
Idrissa Abubakar ◽  
Jafri Din ◽  
Hong Yin Lam
Keyword(s):  
Earth Satellite ◽  
Rain Attenuation ◽  
Modulation Scheme ◽  
Atmospheric Conditions ◽  
Band Frequency ◽  
Link Performance ◽  
Satellite Links ◽  
Broadband Signal ◽  
Rain Events ◽  
Sky Conditions

<span lang="EN-GB">The utilisation of higher frequency bands above 10 GHz by the satellite industries to provide the bandwidth (BW) required for broadband multimedia services, video conferencing, direct-to-home TV programmes and IP data requires the understanding of atmospheric losses and good link planning for satellite-to-earth links. The trade-off between the service availability, data rate and BW determine the type of modulation scheme and error corrections to be employed. These services also depend on the link performance under adverse atmospheric conditions, especially rain-induced attenuation. In this research, study measurements were conducted on space-to-earth satellite links using the beacon narrowband and broadband IP carrier signals of a Nigcomsat-1R satellite operating at 42.5°E. A VSAT receiving terminal at a latitude of 7.4°N, longitude of 9.04°E and altitude of 334 m above sea level was utilised to quantify the rain-induced attenuation of both the beacon and broadband signals during rain events. The measurements were then compared with the link performance under clear sky conditions. The performance revealed that, when compared with the broadband signal, the induced rain attenuation on beacon signal presented a disparity in the responses, resulting in significant variations of 10.14 dB in the carrier-to-noise ratio (C/N) and 17.42 dB in the received signal level at a Ku-band frequency of 12.518 GHz. These observations were also compared with the Crane global rain map and ITU-R P.618-12. Both models disagreed with the measurement values for Abuja, Nigeria.</span>

Prediction of Joint Rain Attenuation Statistics Induced on Earth–Satellite Multiple Site Diversity Systems Using Gaussian Copula

2017 ◽  
Vol 16 ◽  
pp. 95-98 ◽  
Author(s):  
Arsim Kelmendi ◽  
Charilaos Kourogiorgas ◽  
Andrej Hrovat ◽  
Athanasios D. Panagopoulos ◽  
Gorazd Kandus ◽  
...  
Keyword(s):  
Earth Satellite ◽  
Rain Attenuation ◽  
Gaussian Copula ◽  
Multiple Site ◽  
Diversity Systems ◽  
Site Diversity

Simple rain attenuation prediction method for satellite radio links

1988 ◽  
Vol 36 (3) ◽  
pp. 444-448 ◽  
Author(s):  
J.A. Garcia-Lopez ◽  
J.M. Hernando ◽  
J.M. Selga
Keyword(s):  
Prediction Method ◽  
Rain Attenuation

scholarly journals Analysis of Time Diversity Gain for Satellite Communication Link based on Ku-Band Rain Attenuation Data Measured in Malaysia

2018 ◽  
Vol 8 (4) ◽  
pp. 2608
Author(s):  
Islam Md. Rafiqul ◽  
Ali Kadhim Lwas ◽  
Mohamed Hadi Habaebi ◽  
Md Moktarul Alam ◽  
Jalel Chebil ◽  
...  
Keyword(s):  
Satellite Communication ◽  
Satellite Communications ◽  
Earth Satellite ◽  
Rain Attenuation ◽  
Diversity Gain ◽  
Communication Link ◽  
Time Diversity ◽  
Communication Links ◽  
System Time ◽  
Diversity Technique

<p><span>This paper reports a study on mitigation of propagation impairments on Earth–space communication links. The study uses time diversity as a technique for mitigating rain propagation impairment in order to rectify rain fade. Rain attenuation time series along earth-to-satellite link were measured for two years period at 12.255 GHz in Malaysia. The time diversity technique was applied on measured rain fade to investigate the level of possible improvement in system. Time diversity gain from measured one-minute rain attenuation for two years period was estimated and significant improvement was observed with different delays of time. These findings will be utilized as a useful tool for link designers to apply time diversity as a rain fade mitigation technique in Earth-satellite communications systems.</span></p>

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