Science / Weather / Graupel: A form of frozen precipitation consisting of snowflakes or ice crystals and supercooled water droplets frozen together.


Science / Weather / Hail: Precipitation that originates in convective clouds, such as cumulonimbus, in the form of balls or irregular pieces of ice, which comes in different shapes and sizes. Hail is considered to have a diame MORE

Depolarisation Ratio (LDR)

Technology / Radar / Depolarisation Ratio (LDR): Ratio between the reflectivity received at vertical polarisation, but transmitted with horizontal polarisation, and the reflectivity at horizontal polarisation. Depolarisation of the horizontal polari MORE

Differential Reflectivity (ZDR)

Technology / Radar / Differential Reflectivity (ZDR): Ratio between the reflectivity of a horizontal polarised pulse and the reflectivity of a vertical polarised pulse. Zdr depends on the asymmetry of the shape, the orientation and the falling behaviour MORE