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Whole Sky Imager (WSI) - IOP

Instrument Categories: Cloud Properties

General Overview

Picture of the Whole Sky Imager (WSI)

The whole-sky imager (WSI) is an automated imager used for assessing and documenting cloud fields and cloud field dynamics. The WSI is a ground-based electronic imaging system that monitors the upper hemisphere. It is a passive, i.e., non-emissive, system that acquires images of the sky dome through three spectral filters (neutral, red, and blue). From these sky images, we can assess the presence, distribution, shape, and radiance of clouds over the entire sky using automated cloud decision algorithms and related processing. The current WSI model (EO System 6) is capable of image acquisition under daylight, moonlight, and starlight conditions.

IOPs Where the Instrument was Used

Primary Measurements Taken

The following measurements are those considered scientifically relevant. Refer to the datastream (netcdf) file headers for the list of all available measurements, including those recorded for diagnostic or quality assurance purposes.

Mentor(s)

Jimmy Voyles
(979) 690-9846
jimmy.voyles@pnl.gov