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Page 1 Wind Profile Radar (WPR) at the Ogimi Wind Profiler Facility (128° 09' 32" E, 26° 40' 41" N, 225 m MSL)Principles of Wind Profile Radar (WPR) Page 2 Time Domain Integration (Coherent Integration) Page 3 Frequency Domain Integration (Incoherent Integration) Page 4 Typhoon Nari, 2001 (09/07/2001, 11:22, 2.00 ms, 8 bits) Page 5 Typhoon Nari, 2001 (09/07/2001, 14:45, 2.00 ms, 8 bits) Page 6 Path of Typhoon Nari, 2001 Page 7 Time-Altitude Cross-section of Horizontal Wind Velocity Near Typhoon Nari, 2001 Page 8 Principles of RASS (Radio Acoustic Sounding System) Page 9 Altitude-Velocity Doppler-Spectrum Distribution in RASS Observation. Page 10 Virtual-Temperature Profile by RASS Observation (09/04/2001, 15:43-15:54) Page 11 Data Flow

Typhoon Nari, 2001

The 400-MHz-band wind profiler is highly sensitive not only to atmospheric turbulence, but also to precipitating particles.

These spectra were taken during periods of precipitation; the red area represents strong signals scattered from precipitating particles.

Signals scattered by atmospheric turbulence and precipitating particles can be distinguished from each other relatively easily with the 400-MHz-band wind profiler. Therefore, even during precipitation, wind velocity and precipitation intensity can both be measured to a certain extent. Since rain falls downward, raindrops exhibit positive Doppler velocity with respect to the radar. In the data, the left-hand side of each figure shows the precipitation component.

(09/07/2001 14:45 2.00 ms 8 bits)

Typhoon Nari, 2001(2001/09/07 14:45 2.00ms 8bits)
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