Articles | Volume 12, issue 12
Atmos. Meas. Tech., 12, 6579–6599, 2019
https://doi.org/10.5194/amt-12-6579-2019
Atmos. Meas. Tech., 12, 6579–6599, 2019
https://doi.org/10.5194/amt-12-6579-2019

Research article 13 Dec 2019

Research article | 13 Dec 2019

The Universal Cloud and Aerosol Sounding System (UCASS): a low-cost miniature optical particle counter for use in dropsonde or balloon-borne sounding systems

Helen R. Smith et al.

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Short summary
The Universal Cloud and Aerosol Sounding System (UCASS) is a low-cost miniature optical particle counter (OPC) capable of sizing particles in the size range 0.4–40 μm. The open-geometry design makes the instrument suitable for deployment on balloon-borne sounding systems, dropsonde systems or as part of an unmanned aerial vehicle (UAV). Laboratory and field experiments show good agreement with reference instruments in a range of cloudy and dusty environments.