Attenuation diversity measurements at 20 and 30 GHz

Vogel, W.J.; Straiton, A. W.; Fannin, B. M.; Wagner, N. K.

doi:10.1029/rs011i003p00167

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…They are presented both to allow a characterization of rain attenuation for the particular climatic conditions of Austin, Texas, and to permit the testing of models which are being developed for prediction purposes. Similar data have been obtained in the United States (mostly along the eastern coast) and are reported by Arnold et al [-1982;1981J, Lin et al [1980J, Goldhirsch [1979, Bloch et al [1978], Vogel et al [1976], and…”

Section: Introductionsupporting

confidence: 85%

Measurements of satellite beacon attenuation at 11.7, 19.04, and 28.56 GHz and radiometric site diversity at 13.6 GHz

Vogel¹

1982

Radio Science

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The results from about 2 years of space and frequency diversity measurements of attenuation, obtained in Austin, Texas, are presented. The data from 11.7, 13.6, 19.04, and 28.56 GHz were analyzed with regard to fade probability, seasonal and diurnal variations, time duration between fades, frequency scaling, and, at 13.6 GHz, site diversity. With reasonably typical weather, fades were found to be most likely to occur during summer afternoons. The diversity gain was about 80% of the attenuation value, and the frequency scaling, based on the statistical results, closely follows a dependence given by (ƒ/ƒ0)2.

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Section: Introductionsupporting

confidence: 85%

Measurements of satellite beacon attenuation at 11.7, 19.04, and 28.56 GHz and radiometric site diversity at 13.6 GHz

Vogel¹

1982

Radio Science

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“…The knowledge of the statistical characteristics of the rain structure is important for successful implementation of SD concept. Experimental work has been carried out since 1970s to study the rain cell horizontal distribution [ Capsoni et al , 1987; Goldhirsh , 2000; Enjamio et al , 2005; Feral et al , 2005] as well as SD applications [ Panagopoulos et al , 2004; Hall and Allnut , 1975; Vogel et al , 1976; Hodge , 1974]. Most of the initial studies were carried out over temperate region.…”

Section: Introductionmentioning

confidence: 99%

Micro rain cell measurements in tropical India for site diversity fade mitigation estimation

et al. 2010

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[1] Intersite separation (ISS) between two terminals is one of the important parameters required for implementation of site diversity (SD), as a fade mitigation technique (FMT), in moderate to heavy rain conditions usually encountered in tropical climates. This paper presents the findings of an experiment during the monsoon periods of years 2007 and 2008. It establishes the existence of micro rain cell (MRC) at a tropical site, Ahmedabad (23.06°, 72.62°), India, using measurements from tipping bucket rain gauge network. Spatial extent of MRCs and derived attenuation cells is examined on the basis of their maximum occurrence for initial to mid and last spells of years 2007 and 2008. The analysis also presents ISS statistics of monsoon periods for both the years. Microscale SD as FMT has been discussed on the basis of the calculated diversity gain at K a band frequency in view of the proposed GSAT-4 satellite. These are the very first findings of their kind over the region of study.

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Prediction of slant path rain attenuation statistics at various locations

Goldhirsh¹

1977

Radio Science

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A method is described here for predicting attenuation statistics as a function of frequency and elevation angle at various locations. This method uses median reflectivity factor-height profiles as measured with radar. The zenith attenuations for each profile are calculated assuming a Laws and Parsons drop size distributioa. These attenuations are tied to the ground point rain rate and the corresponding probability exceedance levels as measured using long term raingauge data for the particular region in which statistics are to be predicted. The slant path attenuations at other elevation angles, 0 (0 -> 20ø), are arrived at using the csc 0 factor. The attenuation contribution of clouds which occur in the presence of rain is also considered using model liquid water content-height profiles. Eight comparisons of absolute probability fade distributions are made of the measured and predicted cases, namely, for Maryland (15 GHz), Texas (30 GHz), Slough, England (19 and 37 GHz), Fayetteville, N.C. (13 and 18 GHz), and Cambridge, Mass. (13 and 18 GHz). In comparing the measured and predicted cases, the overall average of the probability ratios was 1.4.

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Attenuation diversity measurements at 20 and 30 GHz

Cited by 7 publications

References 3 publications

Measurements of satellite beacon attenuation at 11.7, 19.04, and 28.56 GHz and radiometric site diversity at 13.6 GHz

Measurements of satellite beacon attenuation at 11.7, 19.04, and 28.56 GHz and radiometric site diversity at 13.6 GHz

Micro rain cell measurements in tropical India for site diversity fade mitigation estimation

Prediction of slant path rain attenuation statistics at various locations

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