NSF UV Monitoring Network: File description of preliminary spectral integrals and dose-rates File Description Database 3 (Weighted Irradiance and Dose-Rates)

For more information on data format see Section 6 of our latest Operations Report.

Column Fieldname Unit Description
1 DataScan - Filename of spectral scan. Filename is of the form SFYYHHMM.DDD, with
  • S = site code (A = McMurdo Station; B = Palmer Station; C = South Pole Station; D = Ushuaia; E = San Diego; F = Barrow)
  • F = Scan type (D stands for the data scan)
  • YY = Year
  • HH = Hour at start of scan
  • MM = Minute at start of scan
  • DDD = Julian Day
2 Volume - Volume of published data
3 TimeB - Date and Time at start of item 2 of a solar spectral irradiance scan. Date and time refer to Greenwich Mean Time and are encoded into a single number where the integer part is the day number relative to January 1, 1900 (day 1 corresponds to 1/1/1900). The fractional part is the time of day. (For example, the fractional part multiplied with 24 gives the hour of the measurement).

Note: When the file is decoded by Microsoft Excel, the date value will automatically be translated into a correct date/time string, if the box "1904 date system" of the "Tools -> Options -> Calculation"-menu is unchecked.

4 Abnormal - Information about scan quality
5 Site - Site identifier: 1 = McMurdo Station; 2 = Palmer Station; 3 = South Pole Station; 4 = Ushuaia; 5 = San Diego; 6 = Barrow
6 ZenithB degrees Solar zenith angle at start of item 2 of a solar spectral irradiance scan
7 AzimuthB degrees Solar azimuth angle at start of item 2 of a solar spectral irradiance scan
8 E290to315 µW/cm2 UV-B irradiance (integration range 290 - 315 nm)
9 E290to320 µW/cm2 UV-B irradiance (integration range 290 - 320 nm)
10 E320to360 µW/cm2 Spectral irradiance, integrated between 320 and 360 nm
11 E360to400 µW/cm2 Spectral irradiance, integrated between 360 and 400 nm
12 E360to400 µW/cm2 Spectral irradiance, integrated between 400 and 600 nm
13 E289_855to294_118 µW/cm2 Spectral irradiance, integrated between 289.855 and 294.118 nm
14 E294_118to298_507 µW/cm2 Spectral irradiance, integrated between 294.118 and 298.507 nm
15 E298_507to303_03 µW/cm2 Spectral irradiance, integrated between 298.507 and 303.03 nm
16 E303_03to307_692 µW/cm2 Spectral irradiance, integrated between 303.03 and 307.692 nm
17 E307_692to312_5 µW/cm2 Spectral irradiance, integrated between 307.692 and 312.5 nm
18 E312_5to317_5 µW/cm2 Spectral irradiance, integrated between 312.5 and 317.5 nm
19 E317_5to322_5 µW/cm2 Spectral irradiance, integrated between 317.5 and 322.5 nm
20 E322_5to327_5 µW/cm2 Spectral irradiance, integrated between 322.5 and 327.5 nm
21 E327_5to332_5 µW/cm2 Spectral irradiance, integrated between 327.5 and 332.5 nm
22 E332_5to337_5 µW/cm2 Spectral irradiance, integrated between 332.5 and 337.5 nm
23 E337_5to342_5 µW/cm2 Spectral irradiance, integrated between 337.5 and 342.5 nm
24 E342_5to347_5 µW/cm2 Spectral irradiance, integrated between 342.5 and 347.5 nm
25 Dose1 µW/cm2 Erythemally weighted irradiance (action spectrum by Komhyr, W.D. and L. Machta, "The relative response of erythema", in: The Perturbed Troposphere of 1990 and 2020 Vol. IV. CIAP, Dept. of Transportation, Washington. DC., 1973. Parameterization by Green A.E.S, T. Sawada, and E.P Shettle, The middle ultraviolet reaching the ground, Photochemistry and Photobiology, 19, 251-259, 1974.)
26 Dose2 µW/cm2 Erythemally weighted irradiance (action spectrum by Diffey, B.L., "A comparison of dosimeters used for solar ultraviolet radiometry", Photochemistry and Photobiology, 46, 55-60, 1987.)
27 Dose3_CIE_Erythema µW/cm2 Erythemally weighted irradiance (action spectrum by McKinlay, A.F., and B.L. Diffey, "A reference action spectrum for ultraviolet induced erythema in human skin, CIE Research Note, 6(1), 17-22, 1987.)
28 Setlow µW/cm2 DNA weighted irradiance (action spectrum quantifies the potential of UV irradiance to cause damage to DNA. It was suggested by R. B. Setlow in "The wavelengths in sunlight effective in producing skin cancer: a theoretical analysis", Proc. Nat. Acad. Sci., USA, 71 , No. 9, pp. 3363-3366, 1974).
29 Hunter µW/cm2 Spectral irradiance weighted with the "Hunter"-action spectrum (Hunter, J.H., J.H. Taylor, and H.G. Moser, "The effect of ultraviolet irradiation on eggs and larvae of the northern anchovy, Engraulis mordax, and the pacific mackerel, Scomber japonicus, during the embryonic stage", Photochemistry and Photobiology, 29, 325-338, 1979.)
30 Caldwell µW/cm2 Spectral irradiance weighted with the "Caldwell"-action spectrum (Caldwell, M. M., "Solar UV irradiation and the growth and development of higher plants," Photophysiology, 6, 131-177, 1971.)
31 TSI290to315 - Average TSI measurements between 290 and 315 nm
32 TSI290to320 - Average TSI measurements between 290 and 320 nm
33 TSI320to360 - Average TSI measurements between 320 and 360 nm
34 TSI360to400 - Average TSI measurements between 360 and 400 nm
35 TSI400to600 - Average TSI measurements between 400 and 600 nm
36 TSI298_507to303_03 - Average TSI measurements between 298.507 and 303.03 nm
37 TSI303_03to307_692 - Average TSI measurements between 303.03 and 307.692 nm
38 TSI307_692to312_5 - Average TSI measurements between 307.692 and 312.5 nm
39 TSI322_5to327_5 - Average TSI measurements between 322.5 and 327.5 nm
40 TSI337_5to342_5 - Average TSI measurements between 337.5 and 342.5 nm
41 PSP290to320 mW/cm2 Short-wave (0.3 - 3 µm) solar irradiance meausured with an Eppley Laboratory Precision Spectral Pyranometer (PSP). Value is average value of measurements performed during the 290 - 320 nm interval of the spectral scan.
42 PSP400to600 mW/cm2 Average of PSP measurements performed during the 400 - 600 nm interval of the spectral scan.
43 TUVR290to320 mW/cm2 Broadband solar UV irradiance (spectral range 295 - 385 nm) meausured with an Eppley Laboratory TUVR instrument. Value is average value of measurements performed during the 290 - 320 nm interval of the spectral scan.
44 TUVR400to600 mW/cm2 Average of TUVR measurements performed during the 400 - 600 nm interval of the spectral scan.
45 W_TSI µW/cm2 Spectral irradiance weighted with the spectral response function of the TSI detector

Remarks:
  • Please see Section 4.2.3 of our latest Operations Report for details on the parameterization of action spectra.

  • TSI stands for "Total Scene Irradiance" sensor. The sensor consists of a filtered photodiode that is an integral part of the system. Values published in Database 3 are average TSI measurements performed during several intervals of the spectral scan. Thus, TSI measurements give an indication of the change of solar irradiance during a spectral scan, for example due to clouds. For more information, see Section 2.1.2 of our latest Operations Report.