เปรียบเทียบวิธี

	Velocity-Azimuth Display	เรดาร์แบบสองโพลาไรเซชัน
สาขาวิชา	อุตุนิยมวิทยา	อุตุนิยมวิทยา
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1968	1990s
ผู้ริเริ่ม	Browning and Wexler	Bringi, Chandrasekar
ประเภท	Radar wind retrieval method	Radar measurement technique
แหล่งต้นตำรับ	Browning, K. A., & Wexler, R. (1968). The determination of kinematic properties of a wind field using Doppler radar. Journal of Applied Meteorology, 7(1), 105-113.	Kumjian, M. R. (2013). The impact of precipitation on supercell electrification: Lightning potential and storm structure changes. Journal of the Atmospheric Sciences, 69(11), 3353-3375.
ชื่อเรียกอื่น	VAD, VAD analysis, Velocity-height profile	Dual-pol radar, Polarimetric radar, Dual-polarization, Dual-pol
ที่เกี่ยวข้อง	3	3
สรุป	The Velocity-Azimuth Display (VAD) is a radar analysis technique that extracts the radial velocity of wind at a constant altitude as a function of azimuth angle around the radar. By fitting a sinusoidal pattern to these measurements, VAD retrieves the mean wind speed and direction at that altitude, providing wind profiles without requiring multiple radar observations.	Dual-polarization (dual-pol) radar is a weather radar system that transmits and receives electromagnetic waves in both horizontal and vertical polarizations simultaneously. This technique, operational in weather services since the 2010s, provides detailed information about precipitation particle type, shape, and size distribution, enabling improved rainfall estimates and better discrimination of hail, rain, and snow.