Concept information
Preferred term
FCAS II
Definition
- The Focused Cavity Aerosol Spectrometer II (FCAS II) sizes particles in the approximate diameter range from 0.09 to 2 microns. Particles are drawn from the free stream with a near-isokinetic inlet and transported to the instrument. They then pass through a laser beam, and the light scattered by individual particles is measured (Fig. 1). Particle size is related to the intensity of the scattered light. The data reduction for the FCAS II takes into account the water that is evaporated from the particle during sampling and the effects of anisokinetic sampling. Additional information available at "http://cloud1.arc.nasa.gov/solveII/instrument_files/fcasII.pdf" [Summary provided by NASA] (en)
Broader concept
- Spectrometers (en)
URI
https://gcmd.earthdata.nasa.gov/kms/concept/67ea269c-cccd-405a-8911-177b947ec93d
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