Weighted Irradiance Data Download
Data Requests
Erythemal Radiation
Erythemal Radiation is the irradiance in Watts per square meter measured over the 300 through 400 nanometer range and weighted with the Mc Kinlay and Diffey, (1987) action spectrum.

Valid date range for location Alaska, Fairbanks, AK01 is from Sat Aug 26 00:00:00 GMT+00:00 2000 to Tue May 26 00:00:50 GMT+00:00 2015

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
  • Ohio,Oxford
  • Oklahoma,Billings
  • Ontario,Toronto
  • Saskatchewan,Regina
  • Texas,El Paso
  • 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
  • Hawaii,Waimea,Forrest Mims,HI21
  • Hawaii,Waimea,Forrest Mims,HI31
  • Hawaii,Waimea,Mauna Loa,HI11
  • Hawaii,Waimea,vis cal reference,HI51
  • Hawaii,Waimea,vis cal,HI41
  • Hawaii,Waimea,vis cal,HI61
  • Hawaii,Waimea,vis cal,HI71
  • Louisiana,Baton Rouge,SU-Ag
  • Maryland,Greenbelt,NASA,MD21
  • Texas,Seguin,vis LED unit
  • Short Term Experimental Research Sites
  • Colorado,Fort Collins,CO21
  • Colorado,Fort Collins,CO31
  • Colorado,Nunn,CO71
  • Colorado,Nunn,CO81
  • Maine,Howland,data by spcl request
  • Mexico,Mexico City,UTTEC T1,MX01
  • Mississippi,Brooksville,vis-MFRSR only
  • Mississippi,Newton,vis-MFRSR only
  • Mississippi,Stoneville,vis-MFRSR only
  • Texas,Houston,LaPorte Airport