Vehicle Testing and Integration Facility RSR  

Vehicle Testing and Integration Facility (VTIF)
National Renewable Energy Laboratory (NREL)
Golden, Colorado
Rotating Shadowband Radiometer (RSR)

Latitude: 39.74211o North
Longitude: 105.17514o West
Elevation: 1793 meters AMSL
Time Zone: -7.0

Data sets currently available on VTIF RSR web site

A rotating shadowband radiometer (RSR) offers a lower cost option of measuring solar radiation resources for renewable energy applications. The RSR uses a silicon-based photodiode pyranometer to measure the global and diffuse solar irradiance. The control and data acquisition system then computes the corresponding direct normal solar irradiance based on the geographic location of the RSR and the time of the data collection events.

By design, the RSRs offer the potential advantages of lower maintenance and calibration costs because they use a single pyranometer with a diffuser for determining the direct, diffuse, and global solar irradiance rather than up to three radiometers with larger optical surfaces, more complex support equipment, or more maintenance-intensive support equipment. Their potential disadvantage is the higher estimated measurement uncertainty because of factors such as the restricted spectral response of the silicon-based detector used in the RSR. Postprocessing software to account for the limited spectral response of the silicon detector has been developed and applied the RSR data. This solar-powered system is simple to operate and provides basic resource information.

For more information about the RSR visit Irradiance, Inc.

For more information about this website or the data contact: Afshin Andreas

Any publication based in whole or in part on these data sets should cite the data source as:

Lustbader, J.; Andreas, A.; (2012). NREL Vehicle Testing and Integration Facility (VTIF): Rotating
Shadowband Radiometer (RSR); Golden, Colorado (Data); NREL Report No. DA-5500-56490.