| 摘要 |
PROBLEM TO BE SOLVED: To calculate the rainfall rate at high resolution and high accuracy at an unprecedented level. SOLUTION: The weather radar system includes: a transmitting/receiving unit (11-16) configured to simultaneously transmit radar waves of a horizontally polarized wave and a vertically polarized wave and receive reflected waves; a signal processing unit (17) configured to perform dual polarization observation based on a reception output from the transmitting/receiving unit and calculate a plurality of observation parameters; and a data conversion unit (18) configured to synthetically determine the rainfall rate based on an observation parameter having a low spatial resolution and higher correlation with the rainfall rate and an observation parameter having a high spatial resolution and lower correlation with the rainfall rate from among the plurality of observation parameters. The rainfall rate (R) is synthetically calculated by combining a specific inter-polarization differential phase (K<SB>DP</SB>) having a low spatial resolution and higher correlation with the rainfall rate and a radar reflectivity factor (Z), as a relative value near the location, having a high spatial resolution and lower correlation with the absolute value of the rainfall rate. COPYRIGHT: (C)2011,JPO&INPIT
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