What would be the best technique for calibrating a UVER sensor (UVS-E-T) using a UV-B sensor (Solar Light 501 or similar)?

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Germar Bernhard

You can run the UVS-E-T side by side with Solar Light 501 using the Sun as the light source. I.e., you would calibrate the UVS-E-T vicariously against the SL501. The problem with this approach is that the spectral response of the two instruments is likely different. In this case, ratios of their measurement will depend on the solar zenith angle and total ozone column. The problem is discussed in this report in great detail:

ftp://ftp.wmo.int/Documents/PublicWeb/arep/gaw/final_gaw164_bookmarks_17jul.pdf

Raul R. Cordero

It seems to be not possible due to the the fact that both instruments may have different spectral responses. You may need a spectroradiometer as reference for calibrating both instruments.