降雨減衰補正と合成雨量作成手法の改良のよるXRAIN観測雨量の精度向上

書誌事項

タイトル別名
  • IMPROVEMENT OF THE RADAR RAINFALL ACCURACY OF XRAIN BY MODIFYING OF RAINFALL ATTENUATION CORRECTION AND COMPOSITING RADAR RAINFALL
  • コウウ ゲンスイ ホセイ ト ゴウセイ ウリョウ サクセイ シュホウ ノ カイリョウ ノ ヨル XRAIN カンソク ウリョウ ノ セイド コウジョウ

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抄録

The Ministry of Land, Infrastructure, Transport and Tourism (MLIT) built the rainfall observation network composed of 38 X-band dual polarimetric radars called XRAIN. The results of verifying the accuracy of the XRAIN rainfall, attenuation correction caused underestimation of radar rainfall distant from radar, and that underestimation caused underestimation of the compositing rainfall close to radar. The method of attenuation correction was modified to correct for attenuation of the almost all intensity of rainfall. The compositing rainfall processing was modified to add the weighting function related to the distance from radar. Modifying of attenuation correction and compositing rainfall processing improved underestimation of XRAIN rainfall.

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