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Instrument: FCAS : Focused Cavity Aerosol Spectrometer
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Description
The Focused Cavity Aerosol Spectrometer (FCAS) counts and sizes
aerosol particles by measuring the amount of light scattered as
they pass through a laser beam. The instrument consists of a
sampling inlet, a Particle Measuring model Focused Cavity
Aerosol Spectrometer, and a data acquisition and recording
system.

Additional information available at
http://www.dfrc.nasa.gov/Research/AirSci/ER-2/pi_inst.html

[Summary provided by NASA]