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File:Erythemal action spectrum.svg

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Summary[edit]

Description
English: UV sunlight spectrum (on a summer day in the Netherlands), along with the CIE erythemal action spectrum. The effective spectrum is the product of the former two.
Date (original upload date)
Source Own work
Author Hankwang
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Gnuplot script:

# data source: http://www.temis.nl/uvradiation/info/uvindex.html
# solar spectrum: in Netherlands, noon, clear blue sky

action(l) = (l<297) ? 1 : ((l<327) ? 0.0015**((l-297)/30) : 1.5e-3*(1.2e-4/1.5e-3)**((l-327)/73))

set xlabel 'Wavelength (nm)'
set ylabel 'Irradiance (W/m^2/nm)'

set xrange [280:390]
set yrange [8e-5:2]
set log y
set grid
set style data lines
set nokey
set label 'Sunlight spectrum' at 330,0.3
set label "Erythemal action\nspectrum" at 320,0.025
set label 'Effective spectrum' at 300,2.5e-4

set terminal svg enhanced fsize 18
set output 'erythemal_spectrum.svg'

plot \
 'sunNL.dat', \
  action(x), \
  'sunNL.dat' using 1:(action($1)*$2)

unset output

Datafile sunNL.dat:

295 1e-4
300 3e-3
305 3.1e-2
310 0.1
315 0.2
320 0.3
325 0.42
330 0.48
340 0.55
350 0.60
365 0.65

Licensing[edit]

GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
  • share alike – If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one.
This licensing tag was added to this file as part of the GFDL licensing update.

Original upload log[edit]

Transferred from en.wikipedia to Commons by Leyo using CommonsHelper. The original description page was here. All following user names refer to en.wikipedia.

  • 2006-07-10 22:30 Hankwang 600×480× (8848 bytes) Reference: http://www.temis.nl/uvradiation/info/uvindex.html

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current04:40, 8 November 2013Thumbnail for version as of 04:40, 8 November 2013600 × 480 (15 KB)Patrick87Improved labels and added translations
00:30, 5 November 2013Thumbnail for version as of 00:30, 5 November 2013600 × 480 (9 KB)Patrick87Fix rendering
23:48, 4 November 2013No thumbnail0 × 0 (9 KB)File Upload Bot (Magnus Manske)Transfered from en.wikipedia by User:Leyo using CommonsHelper
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