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A study of the characteristics of VHF radar echo power in the Taiwan area
Author(s) -
Chu Y. H.,
Hsu T. S.,
Chen L. H.,
Chao J. K.,
Liu C. H.,
Röttger J.
Publication year - 1990
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs025i004p00527
Subject(s) - radiosonde , typhoon , radar , tropopause , echo (communications protocol) , environmental science , meteorology , geology , atmospheric sciences , remote sensing , geodesy , troposphere , physics , telecommunications , computer network , computer science
In this paper the mean gradient of the generalized potential refractive index, denoted by M, calculated from the meteorological data observed at Pan‐Chiao rawinsonde station and the vertical echo power measured with the Chung‐Li VHF radar are studied. It is found that the ratio of wet term to dry term in M varies from 20 dB at 1 km to −10 dB at 10 km, where 0 dB is occurred at 8 km. This indicates that the magnitude of M is dominated by the contribution of humidity below 8 km. The correlation between echo power and M 2 is good. The slope of the regression line relating the echo power and M 2 is found to change for different weather conditions. Furthermore, the echo power profiles during the period of typhoon passage are analyzed. The variation of tropopause height and the maximum radar detectable height during the typhoon passage will be studied.

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