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| Keywords: Solar AM0 spectrum with visible spectrum background (en).png en Solar AM0 Air Mass Zero spectrum Chris A Gueymard 2002 as included in http //www nrel gov/rredc/smarts/ SMARTS 2 95 together with a blackbody spectrum for 5777 kelvin and solid angle 2 16e-5 Ï steradian for the source the solar disk The visible region of the electromagnetic spectrum is shown using the CIE visible spectrum as implemented in http //markkness net/colorpy/ColorPy html ColorPy by Mark Kness 2008 Figure with English labels 2012-05-16 own Created with Matplotlib Danmichaelo Version with Norwegian labels Source <source lang python> encoding utf8 import matplotlib from matplotlib import rc from matplotlib import pyplot as plt import numpy as np rc 'lines' linewidth 0 5 rc 'font' family 'sans-serif' size 10 rc 'axes' labelsize 10 rc 'xtick' labelsize 9 rc 'ytick' labelsize 9 golden_mean np sqrt 5 -1 0 /2 0 inches_per_cm 1 0/2 54 fig_width 8 inches_per_cm fig_height golden_mean fig_width fig plt figure figsize fig_width fig_height from colorpy import ciexyz colormodels Fs 2 16e-5 np pi; Geometrical factor of sun as viewed from Earth h 6 63e-34; Boltzmann const Js c 3 e8; speed of light m/s q 1 602e-19; electron charge C def blackbody wvlgth temp per nanometer 1e-9 fac 2 Fs h c 2 / wvlgth 1 e-9 5 return fac / np exp 1240 / wvlgth 8 62e-5 temp - 1 1 e-9 def draw_vis_spec ax ymax spectrum ciexyz empty_spectrum 0 num_wl spectrum shape rgb_colors np empty num_wl 3 for i in xrange 0 num_wl xyz ciexyz xyz_from_wavelength spectrumi rgb colormodels rgb_from_xyz xyz rgb_colors i rgb rgb_colors / np max rgb_colors scale to make brightest rgb value 1 0 num_points len spectrum for i in xrange 0 num_points-1 x0 spectrumi x1 spectrumi+1 y0 0 0 y1 ymax poly_x x0 x1 x1 x0 poly_y y0 y0 y1 y1 color_string colormodels irgb_string_from_rgb rgb_colors i ax fill poly_x poly_y color_string edgecolor color_string ax fig add_subplot 111 frame ax get_frame frame set_facecolor 'black' xmax 2000 ymax 2 5 Visible spectrum draw_vis_spec ax ymax Blackbody temp 5777 x np arange 100 2000 y blackbody x temp y-1 0 ax fill x y '0 5' alpha 0 7 linewidth 0 9 edgecolor 'yellow' label 'Black body\n d K' temp AM0 spectrum d np loadtxt 'smarts295 ext txt' skiprows 1 x d 0 y d 1 y0 0 y-1 0 ax plot x y color 'white' linewidth 0 5 label 'AM0' ax set_xlim 0 xmax ax set_xticks np arange 0 1999 300 ax set_ylim 0 ymax Tweak tweak and annotate texty 2 25 ax annotate 'UV' xy 50 texty xytext 230 texty xycoords 'data' horizontalalignment 'left' verticalalignment 'center' color ' 33bb33' arrowprops dict arrowstyle '->' color ' 33bb33' ax annotate 'Synlig' xy 400 texty xycoords 'data' horizontalalignment 'left' verticalalignment 'center' color 'white' ax annotate u'Infrared' xytext 720 texty xy 1900 texty xycoords 'data' horizontalalignment 'left' verticalalignment 'center' color ' 33bb33' arrowprops dict arrowstyle '->' color ' 33bb33' leg ax legend loc 'upper right' frameon False bbox_to_anchor 1 0 0 90 txts leg get_texts for txt in txts txt set_color 'white' txt set_fontsize 9 ax tick_params color 'white' labelcolor 'black' for spine in ax spines values spine set_edgecolor 'white' spine set_linewidth 1 4 fig subplots_adjust left 0 16 bottom 0 19 right 0 98 top 0 96 ax set_xlabel u'Wavelength nm' ax set_ylabel u'Irradiance W/m 2 /nm' fig savefig 'Solar AM0 spectrum with visible spectrum background en png' dpi 600 </source> cob Uploaded with UploadWizard Solar spectra Images with Python source code | ||||
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