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GPM Ground and Airborne Validation Diagram
Diagram illustrating ground and airborne instruments measuring the same precip
JacobAdmin Fri, 07/15/2011
Image Caption
This diagram illustrates the GPM Ground Validation technique of using overlapping field measurements to validate rain's physical properties.
  1. Ground level suites of high density

Parsivel (Laser Optical) Disdrometer

Document Description

Overview of the Parsivel instrument:

  • Measures size and fall velocity of hydrometeors
  • Present weather sensor
  • Sampling area: ~50 cm2, varies with drop diameter
  • Number of size and velocity bins: 32 x 32 matrix
  • Drop size range: 0.06-24.5 mm
  • Velocity range: 0.05-20.8 m/sec
  • Operation period at Wallops Island: Spring 2002 - present
  • Manufacturer: OTT in Germany www.ott-hydrometry.de
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