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Data after radar processing （ 220 Mbps ）. IQ data after DBF processing ( ～１ Gbps ）. Three-dimensional Fine Structure of Localized Heavy Rainfalls Measured by Phased Array Weather Radar. Data accumulation section. Data conversion section （ＧＰＧＰＵ）. Osaka Univ. JGN-X Access Point - PowerPoint PPT Presentation
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Three-dimensional Fine Structure of Localized Heavy Rainfalls Measured by Phased Array Weather Radar
Shinsuke Satoh 1 , Tomoo Ushio 2, Shigeharu Shimamura 2, Koichi Maruo 2, Fumihiko Mizutani 3, Masakazu Wada 3, Hiroshi Hanado 1, Seiji Kawamura 1, Seiho Uratsuka 1 and Toshio Iguchi 1
1 NICT, Japan ([email protected])2 Osaka University, Japan3 Toshiba Corporation, Japan
1. Introduction ・ In Japan, severe weather
disasters caused by localized heavy rainfalls or tornadoes have occurred frequently in the last several years.
・ Although it is important to measure three dimensional structure of the rapidly developed severe storms, a volume scan by a parabolic antenna requires substantial time of more than 5 minutes.
Flash flood in the Toga river, Kobe （ 28 July 2008 ）
Small radar network observation
Invisible regionInvisibleregion
Big radar observation
F2 tornado in Tsukuba （ 6 may 2012 ）
The observation area of MLIT C-band radar and X-band MP radar (small blue circles).
2. 3-dim precipitation distribution in isolated cumulonimbus (July 26, 2012)
3-1. PAWR Observation Range
3-2. Back-building localized heavy rainfalls around Uji (Aug 14, 2012)
• We showed some localized heavy rainfall events observed phased array weather radar using 3-dim visualization.
• We have developed real-time data processing system and are at work on creating the web page.
5. Summary17:38:16 17:40:16 17:42:16 17:44:16JST
17:30:16 17:32:16 17:34:16 17:36:16
10 km
5 km
Detailed（ 10 sec. ）
300 range×320 sector （ AZ ） ×110 angle （ EL ） ×2 byte ＝ 20.3 MB / fileTotal size (13 files) ： 275 MB / 10sec （～ 2.4TB/day ⇒ ） 220 Mbps
Normal（ 30sec.）
600 range×300 sector （ AZ ） ×110 angle （ EL ） ×2 byte ＝ 37.8 MB / fileTotal size (13 files) ： 493 MB / 30sec （～ 1.4TB/day ⇒ ） 131 Mbps
Data conversion section（ＧＰＧＰＵ）
Data accumulation section
ＮＡＳ（14.5TB)
Offline collection section
Offline processing section
Monitoring control section
IQ data after DBF processing ( ～１ Gbps ）
IQ data before DBF processing（～ 6 Gbps ）
Data after radar processing（ 220 Mbps ）
DAS（１２TB) RAID
Antenna Equipment
（ 220 Mbps ）
Handai APServer
RAID（ 63TB)
Data Translate Server
RAID（42TB)
Osaka Univ. JGN-X Access Point (L2 Switch)
L3 Switch
ssh
ssh
Petabyte storage (Keihanna)
HUB （ GbE)
（ 220 Mbps ）
JGN-X （ NICT NW)Private NWOsaka Univ. NW
Osaka Univ.LAN
NICTScience Cloud
Data release server（ Koganei ）
Data analysis server（ Koganei ）
12 km
40 km
Kyoto60 km (radius)
Osaka Bay
SuitaAkashi
Kansai Airport
Nara
Uji
Kobe
0400JST
3-3. Stationary line-shaped rain- falls (18:51:20JST, July 22, 2012)
0400JST, Aug 14
2012
4-1. Data processing system
4-2. Publication (http://pawr.nict.go.jp)< Real-time data >
< Observation mode and data size / data rate >
< Past data >
< Evolution of cumulonimbus >
3-dim measurement using phased array
radar (10-30 sec)
3-dim measurement using a parabolic
antenna (5-10 min)
