IEICE TRANSACTIONS on transactions
Modification of Morita and Higuti's Prediction Method of Lognormal Rain Attenuation Distribution by Using Spatial Correlation of Specific Attenuation
Summary :
In the Morita and Higuti (M-H) attenuation prediction method, the spatial correlation function of specific attenuation for conditional time, ρΓ, is, approximated by ρ, the spatial correlation function of rainfall rate. The accuracy of this approximation is examined in this paper. An equation relating ρΓ to ρ is theoretically derived assuming a bi-lognormal distribution of rainfall rates at two points. Theoretical examination shows that the approximation ρΓ=ρ does not necessarily hold accurately in the frequency range 10 to 100 GHz, except for frequencies near 30 GHz. This is also confirmed experimentally by measurements from a rain gauge network. A modified M-H method in which attenuation is predicted using ρΓ is proposed, and an extensive numerical comparison between both methods is made. It is shown that the approximation ρΓ=ρ can limit the applicability of the M-H method in terms of rain climatic condition, frequency, and path length, and that the modified M-H method has the advantage of improved applicability, compared with the M-H method.
- Publication
- IEICE TRANSACTIONS on transactions Vol.E69-E No.2 pp.139-147
- Publication Date
- 1986/02/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- PAPER
- Category
- Antenna and Propagation
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Toshio IHARA, Yoji FURUHAMA, Takeshi MANABE, "Modification of Morita and Higuti's Prediction Method of Lognormal Rain Attenuation Distribution by Using Spatial Correlation of Specific Attenuation" in IEICE TRANSACTIONS on transactions,
vol. E69-E, no. 2, pp. 139-147, February 1986, doi: .
Abstract: In the Morita and Higuti (M-H) attenuation prediction method, the spatial correlation function of specific attenuation for conditional time, ρΓ, is, approximated by ρ, the spatial correlation function of rainfall rate. The accuracy of this approximation is examined in this paper. An equation relating ρΓ to ρ is theoretically derived assuming a bi-lognormal distribution of rainfall rates at two points. Theoretical examination shows that the approximation ρΓ=ρ does not necessarily hold accurately in the frequency range 10 to 100 GHz, except for frequencies near 30 GHz. This is also confirmed experimentally by measurements from a rain gauge network. A modified M-H method in which attenuation is predicted using ρΓ is proposed, and an extensive numerical comparison between both methods is made. It is shown that the approximation ρΓ=ρ can limit the applicability of the M-H method in terms of rain climatic condition, frequency, and path length, and that the modified M-H method has the advantage of improved applicability, compared with the M-H method.
URL: https://global.ieice.org/en_transactions/transactions/10.1587/e69-e_2_139/_p
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@ARTICLE{e69-e_2_139,
author={Toshio IHARA, Yoji FURUHAMA, Takeshi MANABE, },
journal={IEICE TRANSACTIONS on transactions},
title={Modification of Morita and Higuti's Prediction Method of Lognormal Rain Attenuation Distribution by Using Spatial Correlation of Specific Attenuation},
year={1986},
volume={E69-E},
number={2},
pages={139-147},
abstract={In the Morita and Higuti (M-H) attenuation prediction method, the spatial correlation function of specific attenuation for conditional time, ρΓ, is, approximated by ρ, the spatial correlation function of rainfall rate. The accuracy of this approximation is examined in this paper. An equation relating ρΓ to ρ is theoretically derived assuming a bi-lognormal distribution of rainfall rates at two points. Theoretical examination shows that the approximation ρΓ=ρ does not necessarily hold accurately in the frequency range 10 to 100 GHz, except for frequencies near 30 GHz. This is also confirmed experimentally by measurements from a rain gauge network. A modified M-H method in which attenuation is predicted using ρΓ is proposed, and an extensive numerical comparison between both methods is made. It is shown that the approximation ρΓ=ρ can limit the applicability of the M-H method in terms of rain climatic condition, frequency, and path length, and that the modified M-H method has the advantage of improved applicability, compared with the M-H method.},
keywords={},
doi={},
ISSN={},
month={February},}
Copy
TY - JOUR
TI - Modification of Morita and Higuti's Prediction Method of Lognormal Rain Attenuation Distribution by Using Spatial Correlation of Specific Attenuation
T2 - IEICE TRANSACTIONS on transactions
SP - 139
EP - 147
AU - Toshio IHARA
AU - Yoji FURUHAMA
AU - Takeshi MANABE
PY - 1986
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E69-E
IS - 2
JA - IEICE TRANSACTIONS on transactions
Y1 - February 1986
AB - In the Morita and Higuti (M-H) attenuation prediction method, the spatial correlation function of specific attenuation for conditional time, ρΓ, is, approximated by ρ, the spatial correlation function of rainfall rate. The accuracy of this approximation is examined in this paper. An equation relating ρΓ to ρ is theoretically derived assuming a bi-lognormal distribution of rainfall rates at two points. Theoretical examination shows that the approximation ρΓ=ρ does not necessarily hold accurately in the frequency range 10 to 100 GHz, except for frequencies near 30 GHz. This is also confirmed experimentally by measurements from a rain gauge network. A modified M-H method in which attenuation is predicted using ρΓ is proposed, and an extensive numerical comparison between both methods is made. It is shown that the approximation ρΓ=ρ can limit the applicability of the M-H method in terms of rain climatic condition, frequency, and path length, and that the modified M-H method has the advantage of improved applicability, compared with the M-H method.
ER -
English
