2D Video Disdrometer (SVD-2)

The 2D Video Disdrometer (SVD-2) is a precipitation particle measurement device that can measure the size, shape, and falling velocity of individual precipitation particles in real time. Precipitation particle types include rain, snow, hail, and others. Through the device software, precipitation rate, precipitation amount, and precipitation particle spectra can be calculated. Data observed by the device are key elements for studying atmospheric precipitation processes and are also important tools for calibrating cloud radars and precipitation radars.

Output data: raindrop spectrum, particle equivalent diameter, particle volume, particle horizontal velocity, particle vertical velocity, oblateness, rainfall amount
Particle equivalent diameter measurement range: 0.2mm-60mm
Particle equivalent diameter measurement error: ≤±0.2mm (particle diameter ≤10mm), ≤4% (particle diameter >10mm)
Particle horizontal velocity measurement range: 0.2m/s-10m/s
Particle horizontal resolution: ≤0.1mm
Particle horizontal velocity measurement error: ≤4% (when precipitation particle falling velocity ≤10m/s), ≤10% (when precipitation particle falling velocity >10m/s)
Particle vertical velocity measurement range: 0.2m/s-20m/s
Particle vertical resolution: ≤2.5%*falling velocity (m/s) mm
Particle vertical velocity measurement error: ≤4% (when precipitation particle falling velocity ≤10m/s), ≤10% (when precipitation particle falling velocity >10m/s)
Oblateness measurement range: 0-1 (dimensionless)
Oblateness measurement accuracy: ≤±0.1 (dimensionless) (particle equivalent diameter ≤10mm), ≤±0.2 (particle equivalent diameter >10mm)
Sampling area: ≥80 cm²
Main unit dimensions and weight: main unit dimensions <800mm×800mm×400mm, main unit weight <38kg