ld

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).

Moment 4 from the observed distribution
Precipitation intensity
Liquid water content
Meteorological optical range visibility
Fall velocity calculated after Lhermite
New snow height
Median volume diameter, assuming an ideal Marshall-Palmer type distribution

Gunnison, CO, USA; Mobile Facility (SAIL) - Gunnison, CO; AMF2 (main site for SAIL)

• Latitude: 38.956158
• Longitude: -106.987856
• Publication Date: 2021-09-01
• Start Date: 2021-09-01
• End Date: 2023-06-16
• Last Updated: 2023-06-25

Gunnison, CO, USA; Mobile Facility (SAIL) - Gunnison, CO; Supplemental Facility 2

• Latitude: 38.898361
• Longitude: -106.94314
• Publication Date: 2021-09-03
• Start Date: 2021-09-03
• End Date: 2023-06-16
• Last Updated: 2023-06-25

https://www.arm.gov/connect-with-arm/organization/instrument-mentors/list#ldis

Matthew Sturm

University of Alaska Fairbanks

Die Wang

Brookhaven National Laboratory

Zeen Zhu

Brookhaven National Laboratory

Jennifer Delamere

University of Alaska Fairbanks

Ken Irving

University of Alaska Fairbanks

William Barndt

University of Alaska Fairbanks

Yan Shi

Pacific Northwest National Laboratory

http://dx.doi.org/10.5439/1973058
Atmospheric Radiation Measurement (ARM) user facility. 2021. Laser Disdrometer (LD). 2021-09-01 to 2023-06-16, ARM Mobile Facility (GUC) Gunnison, CO; AMF2 (main site for SAIL) (M1). Compiled by D. Wang, Z. Zhu and Y. Shi. ARM Data Center. Data set accessed at http://dx.doi.org/10.5439/1973058.