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Seen from Space 2004

Major Typhoon No. 18 follows similar path as Typhoon No. 16 towards Kyushu.

 
Fig. 1 Typhoon No. 18 observed by AMSR-E Fig. 2 Typhoon No. 18 observed by MODIS

Typhoon No. 18 (Songda (*1)) is the most powerful typhoon to pass by Okinawa in the last several years. It remains powerful after passing Okinawa's main island with winds of 50 knots (25 m/s) over a day and a half ago. It is predicted to follow a similar path as Typhoon No. 16, which struck Japan last week.

Figure 1, an AMSR-E near-real-time image observed at 0206 (JST) on September 6, depicts the well-developed clouds of Typhoon No. 18 located in the East China Sea. Dark blue on the sea surface indicates a large volume of water vapor in the atmosphere, and yellow represents well-developed clouds. Figure 2 is an image acquired by MODIS aboard NASA's EOS-Aqua satellite at 1046 (JST) on September 5. Figure 3 is a super-imposed image of rain rates near the Earth's surface observed by PR and the cloud image observed by VIRS both aboard the TRMM satellite at 1115 (JST) on September 5. Figure 4 is the precipitation observed by TMI aboard the TRMM satellite at the same time. You can see the heavy precipitation area (red and yellow) is distributed in a spiral around the typhoon. Figures 2 to 4 depict the situation of the typhoon just before it passed Okinawa's main island.

Figures 1 and 2 show an active front north of the typhoon. It is necessary to monitor rainfall from the front because warm wet air accompanying the typhoon flows into the front and stimulates it.

Fig. 3 Rain rate distribution acquired by PR and cloud image acquired by VIRS Fig. 4 Rain rate image acquired by TMI

Typhoon No. 19 (Sarika) is following Typhoon No.18 and needs to be monitored for flood tide and high seas as well as violent winds and rainfall.



(*1)Songda is the name of a river located in northwest Vietnam.
(*2)Sarika means "singing bird" in Cambodian.


Explanation of the images:
Fig. 1
Satellite: EOS- Aqua: Earth Observing System - Aqua (NASA)
Sensor: AMSR-E: Advanced Microwave Scanning Radiometer- EOS (JAXA)
Time and date: 02:06 (JST) on September 6, 2004
EOS-Aqua project is a joint project among NASA, JAXA and INPE (Brazil's space agency).

Fig. 2
Satellite: EOS-Aqua (NASA)
Sensor: MODIS: Moderate Resolution Imaging Spectro-radiometer (NASA)
Time and date: 10:46 (JST) on September 5, 2004
Receiving station: JAXA EOC.

Fig. 3
Satellite: TRMM: Tropical Rainfall Measuring Mission (Built and operated by NASA, launched by JAXA)
Sensor: PR: Precipitation Radar (JAXA)
VIRS: Visible and Infrared Scanner (NASA)
Time and date: 11:15 (JST) on September 5, 2004

Fig. 4
Satellite: TRMM
Sensor: TMI: TRMM Microwave Imager (NASA)
Time and date: 11:15 (JST) on September 5, 2004

Related sites:
TRMM Tropical Cyclone Database
TRMM Tropical Cyclone Quick Report
AMSR-E Tropical Cyclone Quick Report
AMSR-E Today's Image
MODIS Near-real-time Images
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