Theus Solar

Solar Radiation Over the Last 24 Hours

Data collected at 3:30:03 AM   Friday 20-Oct-17 (UTC - 0700)
solar.gif (10751 bytes)

Move the pointer over the magenta time marker to display the current observations. (Requires JavaScript.) Click on the time marker to get the latest observations.
This page will ask your browser to fetch an updated version of itself every 10 minutes.

The blue "Maximum Irradiance" curve is the solar radiation expected at this location on this date with a clear sky. It is the amount of solar radiation hitting this location measured above the atmosphere minus the expected losses through the atmosphere. The blue-green "Typical Irradiance" curve uses the monthly clearness index for Eugene to produce the amount of solar radiation expected on this date. Extraterrestrial solar radiation is calculated using solpos.c which is distributed by the National Renewable Energy Laboratory.

For more on irradiance go to the UO Solar Radiation Monitoring Laboratory.