From this page, you can specify data to download or you can navigate to pages that describe the data collected at each monitoring station, provide information about data file structure, or contain details about the instruments we use to measure solar radiation.
Understanding the solar resource
Prior to using solar data it is important to understand the terminology of solar resource assessment and the geometry that relates the incoming solar radiation to the collector. The section on solar radiation basics provides this fundamental information. Information on modeling and correlations of the solar resource can be found in PDF files that are part of our Pacific Northwest Solar Radiation Data book.
Pacific Northwest solar resource maps
To gain an appreciation for the amount of solar radiation available in the Pacific Northwest, and to see at a glance the seasonal variation in this resource, check out our series of average annual and monthly irradiance maps.
To download data
Choose from the following types of data files:
- cumulative summary files, for one particular measurement, covering the entire period of record
- files containing daily total and average data for a single year
- files having monthly averages of 5-, 15-, or 60-minute data for a single year
- files containing a single type of data presented in a format that makes it easy to compare by the hour and day
- files of archival data taken over time intervals of 5, 15, or 60 minutes
- daily files with 1-minute or 2.5-minute spectral data from a Multifilter Rotating Shadowband Radiometer (MFR-7)
- parsed TMY2 or TMY3 data files
To plot archival data
Our data plotting program graphically depicts selected data, allowing you to see at a glance how irradiance values, solar cell performance, or meteorological readings varied on particular days at specified monitoring stations. In addition to the general program interface, we've included links to it from all of our Web pages devoted to currently active monitoring stations (such as this: Eugene). These links cause the program to display charts of the most recent data we have from our active stations.
Solar monitoring stations
Locate our monitoring stations on a map, and find out what types of data are measured at each one.
More about our data
Read about types of data we collect, including conventions used in our data files. For specific information about particular types of data files, click on one of the following links:
- Cumulative summary files
- Daily total files
- Monthly average files
- Single element profile files
- Archival (short interval) files
- Multifilter Rotating Shadowband Radiometer (MFR-7) files
- Parsed TMY2 files
For more information
Learn about sensors used to monitor solar radiation.
Check out software that will help you manipulate and use solar radiation data.Read technical documents about some of the aspects of solar radiation measurement.