Propagation observations at 3.2 millimeters

Hoffman, L. A.; Wintroub, H. J.; Garber, W. A.

doi:10.1109/proc.1966.4756

Cited by 13 publications

(3 citation statements)

References 5 publications

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“…The results with the available measurement data for all latitudesfor the prediction of wide RR pr ranges and propagationangle are shown in Figure 7, Figure 8, Figure 9, Figure 10, and Figure 11.The second component of attenuation is caused by freespace [36,37]. We call the loss that occurs in free space freespace attenuation.…”

Section: Calculating Total Attenuationmentioning

confidence: 99%

“…Even heavy rainfall of 10 cm/hrseems to cause a small attenuation of 0.05 dB/km with RF signalsat 2.4 GHz. The Ku band attenuation for the same rain fall,however, is approximately nine times that of C-band, andthus very substantial for it to be ignored [36], [37]. Therefore,estimating different atmospheric attenuations at regional or indiv idualsites is important for improving control ofsatellite channel parameters especially when h igher transmissionfrequencies are adopted to achieve greater transmissionrate through communication channels.…”

Section: Calculation Of Rain Gaseous Cloudfog and Scintillation Amentioning

confidence: 99%

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Performance Evolution in Satellite Communication Networks Along with Markovian Channel Prediction

Harb¹,

Yu²,

Abdul-Jauwad³

2012

JWNC

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Augmenting accurate predict ion of channel attenuations can be of immense value in improving the quality of signals athigh frequency for satellite co mmunication networks. Such prediction of weather related attenuation factors for the impendingweather conditions based on the weather data and the Markovian theory are the main object of this paper. The paper also describes anintelligent weather aware control system (IWACS) that is used to emp loy the predict ions made fro m Markov model to maintainthe quality of service (QoS) in channels that are impacted by rain, gaseous, cloud, fog, and scintillat ion attenuations. Based onthat, a three dimensional relationship is proposed among estimated at mospheric attenuations, propagation angle, and predictedrainfall rate (RR pr ) at a given location and operational frequency. This novel method of pred icting weather characteristicssupplies valuable data for mit igation planning, and subsequently for developing an algorithm to iteratively tune the IWACS byadaptively selecting appropriate channel frequency, modulation, coding, propagation angle, transmission power level, and datatransmission rate to imp rove the satellite's system performance. So me simulat ion results are presented to show the effectiveness of the proposedscheme.

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Section: Calculating Total Attenuationmentioning

confidence: 99%

Section: Calculation Of Rain Gaseous Cloudfog and Scintillation Amentioning

confidence: 99%

Performance Evolution in Satellite Communication Networks Along with Markovian Channel Prediction

Harb¹,

Yu²,

Abdul-Jauwad³

2012

JWNC

View full text Add to dashboard Cite

show abstract

“…These attenuations become particularly severe at frequencies higher than 10 GHz, especially for small aperture antenna such as VSAT and TVRO [1,9,30,43,48]. Weather attenuation -which is considered the dominant cause for signal impairment -is a function of frequency, propagation angle, rain intensity, raindrop size distribution, and raindrop temperature [20,23].…”

Section: Impacts Of Atmospheric Attenuations On Satellite Communicationsmentioning

confidence: 99%

Quality of service improvements in weather impacted satellite communication networks

Harb¹

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The author has granted a nonexclusive license allowing Library and Archives Canada to reproduce, publish, archive, preserve, conserve, communicate to the public by telecommunication or on the Internet, loan, distribute and sell theses worldwide, for commercial or noncommercial purposes, in microform, paper, electronic and/or any other formats. L'auteur a accorde une licence non exclusive permettant a la Bibliotheque et Archives Canada de reproduire, publier, archiver, sauvegarder, conserver, transmettre au public par telecommunication ou par I'lnternet, preter, distribuer et vendre des theses partout dans le monde, a des fins commerciales ou autres, sur support microforme, papier, electronique et/ou autres formats. Bien que ces formulaires aient inclus dans la pagination, il n'y aura aucun contenu manquant.

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The propagation of centimeter, millimeter, and submillimeter radio waves in the earth's atmosphere

Zhevakin

Naumov

1971

Radiophys Quantum Electron

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Propagation observations at 3.2 millimeters

Cited by 13 publications

References 5 publications

Performance Evolution in Satellite Communication Networks Along with Markovian Channel Prediction

Performance Evolution in Satellite Communication Networks Along with Markovian Channel Prediction

Quality of service improvements in weather impacted satellite communication networks

The propagation of centimeter, millimeter, and submillimeter radio waves in the earth's atmosphere

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