TY - JOUR
T1 - Diurnal variation of rain attenuation obtained from measurement of raindrop size distribution in equatorial Indonesia
AU - Marzuki, Marzuki
AU - Kozu, T.
AU - Shimomai, T.
AU - Randeu, Walter
AU - Hashiguchi, H.
AU - Shibagaki, Y.
PY - 2009
Y1 - 2009
N2 - The measured rain rate, raindrop size distribution (DSD), and the ITU-R model over the frequency range from 1-100 GHz have been used to elucidate the cumulative rainfall rate and the variability of rain attenuation at Kototabang. Rain rate and DSD are recorded from ground-based optical rain gauge and disdrometer measurements, respectively. Considerable differences between the recorded data and the ITU-R model are observed at small time percentage. The specific rain attenuation obtained from the DSD measurement shows diurnal variation with the largest attenuation observed in the morning hours. This characteristic is due to the raindrop spectra of rain events in this period containing more small-sized drops (< mm) than at others as described by the largest contribution of these drops on the specific rain attenuation. The diurnal variation is serious for frequencies higher than 60 GHz especially in very extreme rain.
AB - The measured rain rate, raindrop size distribution (DSD), and the ITU-R model over the frequency range from 1-100 GHz have been used to elucidate the cumulative rainfall rate and the variability of rain attenuation at Kototabang. Rain rate and DSD are recorded from ground-based optical rain gauge and disdrometer measurements, respectively. Considerable differences between the recorded data and the ITU-R model are observed at small time percentage. The specific rain attenuation obtained from the DSD measurement shows diurnal variation with the largest attenuation observed in the morning hours. This characteristic is due to the raindrop spectra of rain events in this period containing more small-sized drops (< mm) than at others as described by the largest contribution of these drops on the specific rain attenuation. The diurnal variation is serious for frequencies higher than 60 GHz especially in very extreme rain.
UR - http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4812251&isnumber=4812184
U2 - 10.1109/TAP.2009.2015812
DO - 10.1109/TAP.2009.2015812
M3 - Article
SN - 1558-2221
VL - 57
SP - 1191
EP - 1196
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 4;2
ER -