Weighted Irradiance Data Download
Langley Voltage Intercepts
Langley Voltage Offset or V0 (referred to as V naught) represents a hypothetical voltage reading that the detector amplifier system would have if it were making its measurement at the top of the atmosphere where the optical depth is zero. This instrument characteristic is used to derive a responsivity of the respective channels assuming the extraterrestrial solar spectral irradiance is known and constant.

Valid date range for location Alaska, Fairbanks, AK01, AK02 is from Sat Aug 26 00:00:00 GMT+00:00 2000 to Wed May 31 12:26:40 GMT+00:00 2017

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
  • South Korea,Seoul,NASA,KOREA
  • 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
  • Colorado,Longmont,Perm.Reference,CO97
  • Colorado,Longmont,Table Mountain,CO99
  • Colorado,Nunn,Pawnee
  • Hawaii,Waimea,Mauna Loa,HI00
  • Hawaii,Waimea,Mauna Loa,HI03
  • Hawaii,Waimea,Mauna Loa,HI04,ref
  • Hawaii,Waimea,Mauna Loa,HI05
  • Hawaii,Waimea,Mauna Loa,HI06
  • Hawaii,Waimea,Mauna Loa,HI07
  • Hawaii,Waimea,Mauna Loa,HI08
  • Hawaii,Waimea,Mauna Loa,HI09
  • Hawaii,Waimea,Mauna Loa,HI11
  • Hawaii,Waimea,Forrest Mims,HI21
  • Hawaii,Waimea,Forrest Mims,HI22
  • Hawaii,Waimea,Forrest Mims,HI31
  • Hawaii,Waimea,vis cal,HI41
  • Hawaii,Waimea,vis cal,HI51
  • Hawaii,Waimea,vis cal,HI61
  • Hawaii,Waimea,vis cal,HI71
  • Hawaii,Waimea,vis cal,HI81
  • Louisiana,Baton Rouge,SU-Ag
  • Louisiana,Baton Rouge,SU-Ag
  • Maryland,Greenbelt,NASA,MD21
  • Maryland,Greenbelt,NASA,MD22
  • Maryland,Greenbelt,NASA,MD23
  • Texas,Seguin,vis LED unit
  • Short Term Experimental Research Sites
  • Arizona,Tucson,UV-MFRSR only
  • Bolivia,Santa Cruz,NASA MD22 in Bolivia
  • California,Mt. Wilson,SCOS-97
  • California,Mt. Wilson,SCOS-97
  • California,Pasadena,NASA
  • California,Riverside,SCOS-97
  • China,Xianghe,NASA
  • Colorado,Fort Collins,CO22
  • Colorado,Fort Collins,CO23
  • Colorado,Fort Collins,CO24
  • Colorado,Longmont,Table Mountain,CO94
  • Colorado,Longmont,Table Mountain,CO95
  • Colorado,Nunn,CO03
  • Colorado,Nunn,CO04
  • Colorado,Nunn,CO05
  • Colorado,Nunn,CO06
  • Colorado,Nunn,CO07
  • Colorado,Nunn,CO09
  • Colorado,Nunn,CO21
  • Colorado,Nunn,CO31
  • Colorado,Nunn,CO61
  • Colorado,Nunn,CO71
  • Colorado,Nunn,CO81
  • Florida,Gainesville,Portable,FL99
  • Greece,Thessaloniki,NASA
  • Indiana,West Lafayette,Portable,IN99
  • Maine,Howland,data by spcl request
  • Mexico,Mexico City,UTTEC T1,MX01
  • Mexico,Mexico City,2003,MX02
  • Mexico,Mexico City,UNAM CASA,MX03
  • Mexico,Mexico City,IMP T0,MX04
  • Mexico,Mexico City,UTTEC T1,MX05
  • Mississippi,Brooksville,vis-MFRSR only
  • Mississippi,Newton,vis-MFRSR only
  • Mississippi,Stoneville,vis-MFRSR only
  • New York,Geneva,Portable,NY99
  • Norway,Oesteraas,NO02
  • Norway,Oesteraas,NO03
  • Texas,Houston,LaPorte Airport
  • Texas,Houston,LaPorte Airport
  • UAE,Dhabi,NASA