Atmospheric Radiation Measurement Climate Research Facility US Department of Energy

ldis > Laser DisdrometerInstrument Type(s) > Baseline • Evaluation • Guest

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).


  • Fixed
  • AMF1
  • AMF2
  • AMF3


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