The skycam at FLEXLAB captures an HDR image of the sky every five minutes. In addition to documenting sky conditions, the images can be used in Radiance to simulate the sky luminance for a specific time.
LBNL's sky camera resides on top of the FLEXLAB's high-bay testbed, with a beautiful view of the San Francisco Bay. Terrestrial Light, a Berkeley-based startup, designed and manufactured the HDR sky imaging system we use at FLEXLAB.
Every five minutes skycam takes bracketed exposure images of the sky.
These images are combined into a single high dynamic range (HDR) image that encapsulates the entire luminance range of the sky (save the luminance of the sun).
The HDR image is calibrated using global irradiance and illuminance measurements from sensors mounted alongside the skycam.
The sky HDR images can be used to infer the luminance seen through a window, or can be used to accurately replicate the sky in a Radiance daylight simulation.
LBNL's FLEXLAB is pleased to offer data from our sky camera to other researchers and practitioners.
Contact Terrestrial Light to discuss their product and its capabilities, including cloud forecasting.