التفاصيل البيبلوغرافية
| العنوان: |
A 35-GHz Scanning Doppler Radar for Fog Observations. |
| المؤلفون: |
Hamazu, Kyosuke, Hashiguchi, Hiroyuki, Wakayama, Toshio, Matsuda, Tomoya, Doviak, Richard J., Fukao, Shoichiro |
| المصدر: |
Journal of Atmospheric & Oceanic Technology. Jul2003, Vol. 20 Issue 7, p972. 15p. |
| مصطلحات موضوعية: |
*FOG control, *DOPPLER radar, *DOPPLER effect, *RADAR |
| مستخلص: |
To observe fog, a 35-GHz scanning Doppler radar was designed, assembled, and tested. The radar, mounted on a flatbed vehicle for portability, transmits peak powers of 100 kW in a pulse of 0.5-μs width and a beamwidth of 0.3°. Thus, a reflectivity factor Z of -20 dBZ at a range of 10 km generates a signal-to-noise ratio of 0 dB. Doppler velocity measurements are made by sampling the radio frequency phase within each pulse transmitted by a magnetron oscillator and referencing the phases of the received echoes to the transmitted phase. A Nyquist velocity of approximately 9.7 m s[SUP-1] is obtained in real time using the spaced pulse-pair method, and aliases of radial velocities are corrected using software. The three-dimensional structure of sea fog and its advection are depicted with the radar. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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