Japan Blue Radar Observation at Ping-Tung June 10, 2008 Lei Feng 2, Tetsuya Sano 1, Tsung-Jung Lee 2, Satoshi Endo 1 and Ben Jong –Dao Jou 3 1.Hydrosheric Atmospheric Research Center, Nagoya University 2.National S&T Center for Disaster Reduction (NCDR) 3.National Taiwan University

Properties of Japan Blue Radar Transmitting frequency 9375 MHz (X-band) Peak transmitting power 40 kW Pulse length 0.5 μ sec Pulse repetition frequency 2000 Hz Beam width 1.2° Range gate width 250 m Maximum range of data processing 64 km Nyquist velocity 16 m/s Doppler processing Pulse-pair processing Site Information National Ping-Tung University Latitude N Longitude E Altitude 117 m 13 PPIs + 1 RHI: 0.4, 1.0, 1.7, 2.5, 3.5, 4.8, 6.6, 8.7, 11.5, 15.2, 19.7, 25.6, 32.8

Data List (I)

Data List (II)

Data List (III)

PPI mode

RHI mode

・ Data deficit by tape change 0130 UTC ～ 0145 UTC on June UTC ～ 0745 UTC on June 2 ・ Period 1945 UTC on June 1, 2008 ～ 1315 UTC on June 2, 2008 On June 2, 2008 No DATA by shadow area of the observation ・ Overview 1) 2015 UTC ～ 2345 UTC on June 1 Precipitating system which extended from Northwest to Southeast moved from Southwest to Northeast. 2) 0200 UTC ～ 0600 UTC on June 2 Precipitating system which extended from Southwest to Northeast moved from Northwest to Southeast. 3) 0530 UTC ～ 0630 UTC on June 2 Precipitating system with arc shape moved from Southwest to Northeast. 4) 0630 UTC ～ 1315 UTC on June 2 Stratiformprecipitation maintained and covered the observation area.

Reflectivity’s contour : 10 dBZ, 20 dBZ and and every 5 dBZ over 20 dBZ Velocity’s contour : every 2 m/s Terrains’ contour : 10 m, 50 m, 100 m, 150m, 200m, 300m, 400m and with purple color 500m Precipitating system which extended from SW to NE Precipitating cell developed. Doppler velocity toward JDOP developed at 2 – 4 km height.

Reflectivity’s contour : 10 dBZ, 20 dBZ and and every 5 dBZ over 20 dBZ Velocity’s contour : every 2 m/s Terrains’ contour : 10 m, 50 m, 100 m, 150m, 200m, 300m, 400m and with purple color 500m Precipitating system with arc shape The precipitating system was constructed by convective region and sratiform region.

Reflectivity’s contour : 10 dBZ, 20 dBZ and and every 5 dBZ over 20 dBZ Velocity’s contour : every 2 m/s Terrains’ contour : 10 m, 50 m, 100 m, 150m, 200m, 300m, 400m and with purple color 500m Stratiform Precipitation Convective system embeded the stratiform precipitation occurred over the sea.

Reflectivity’s contour : 10 dBZ, 20 dBZ and and every 5 dBZ over 20 dBZ Velocity’s contour : every 2 m/s Terrains’ contour : 10 m, 50 m, 100 m, 150m, 200m, 300m, 400m and with purple color 500m Stratiform Precipitation The convective system propagated in the stratiform precipitation with strong Doppler velocity under 2 km height.