Spectral Irradiance Data Download
  • In Situ calibrated
  • MLO calibrated
  • Historical Lamp calibrated
    • Weighted Irradiance Data Download
  • Erythemal
  • PAR
    • Derived Products Download
  • UV Index
  • Synthetic Spectra
  • Instantaneous Optical Depths
  • UV Irradiance Estimator
    • Climatology Products
  • Daily Sums
  • Hourly Sums
  • Spatio-Temporal Distribution of UV-B
  • US Merged Irradiance Statistics
  • Sums US Contour Maps
    • Instrument Characteristics Download
  • Filter Function Corrections
  • Angular Cosine Corrections
  • Langley Voltage Offsets
  • Serial Number Deployment History
  • Site Location Deployment History
    • Anciliary Measurements Download
  • Internal Head Temperature
  • Air Temp, Humidity, Reflective Solar Irradiance
  • Barometer
  • Electronic Offset(Bias)
  • Cosine Corrected Voltages
  • UVA (uncalibrated)
    • Quality Control Information
  • Data Processing Procedures
  • Data Corrections
  • Quality Control Abbreviations
    • Data Requests
  • Data Directory Access
  • Usage Statistics
    • Photosynthetically Active Radiation (PAR)
    Photosynthetically Active Radiation (PAR) is provided in units micro moles per square meter per second in the 400 to 700 nanometer spectral range. It is measured with a separate PAR pyranometer sensor.

    Please note we now have an FTP Access, to download site/sites, year/years of data.

    Valid date range for location Alaska, Fairbanks, AK01, AK02 is from Tue Jun 24 22:09:00 GMT+00:00 2003 to Tue Oct 26 00:00:48 GMT+00:00 2021

    Location and Time User Inputs
    • Climatological Sites
    • Alaska,Fairbanks
    • Arizona,Flagstaff
    • California,Davis
    • California,Holtville
    • Colorado,Lamar
    • Colorado,Nunn,Pawnee
    • Colorado,Steamboat Springs
    • Florida,Homestead
    • Georgia,Griffin
    • Hawaii,Waimea,Mauna Loa
    • Illinois,Bondville
    • Indiana,West Lafayette
    • Louisiana,Baton Rouge
    • Maine,Presque Isle
    • Maryland,Beltsville
    • Maryland,Queenstown
    • Michigan,Pellston
    • Minnesota,Grand Rapids
    • Mississippi,Starkville
    • Montana,Poplar
    • Nebraska,Mead
    • New Mexico,Las Cruces
    • New York,Geneva
    • New Zealand,Alexandra
    • North Carolina,Raleigh
    • North Dakota,Fargo
    • Oklahoma,Billings
    • Ontario,Toronto
    • Saskatchewan,Regina
    • Texas,Houston
    • Texas,Panther Junction,Castolon site end 12-2014
    • Texas,Panther Junction,K-Bar site opened 12-2014
    • Texas,Seguin
    • Utah,Logan
    • Vermont,Burlington
    • Washington,Pullman
    • Wisconsin,Dancy
    • Long Term Research Sites
    • Louisiana,Baton Rouge,SU-Ag
    • Utah,Salt Lake City,UT21
    • Short Term Experimental Research Sites
    • Colorado,Fort Collins,CO22
    • Colorado,Nunn,CO04
    • Colorado,Nunn,CO06
    • Florida,Gainesville,Portable,FL99
    • Indiana,West Lafayette,Portable,IN99
    • New York,Geneva,Portable,NY99