POPS (the Portable Optical Particle Spectrometer) is a small and light research-grade aerosol instrument. It has been used for aerosol measurements from the Earth's surface to the stratosphere. Robust and relatively inexpensive, it is particularly suitable for UAV and balloon applications.
Ru-Shan Gao is a research physicist in the NOAA Earth System Research Laboratory in Boulder, Colorado, where he has worked since 1992. He leads the Atmospheric Composition and Chemical Processes research group in the Chemical Sciences Division and specializes in instrument development and field measurements related to air quality and climate.
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