LDIS

A laser disdrometer (LDIS) measures the drop size spectra and fall velocity of hydrometeors during precipitation events. The passage of hydrometeors through a horizontal area positioned between an eye-safe laser and an array detector results in blockage of the laser beam in proportion to the size of the drop or particle. In addition to drop/particle size and fall speed, precipitation type is classified.

ARM also deploys video disdrometers (VDIS).

• Hydrometeor size
• Hydrometeor fall velocity
• Hydrometeor Size Distribution
• Liquid water content
• Precipitation
• Snow depth