Good stuff. Funny thing is, I do have a Metarail but it’s in rough shape and without a power supply (got it off ebay) and, as such, have not done much with it. Those seem hard to come by.
Unfortunately, I’m behind on a number of things and have limited time at the moment to run the spectra against the action spectra … but I can supply the spectrometer data for the Fluence Ray44 fixture if that would be useful to you. Otherwise, I can probably get to it once I’m a bit more free’d up. I’ve bookmarked your post as well for future reference. Remind me.
This is a zip file containing an excel spreadsheet, change the extension to .zip
PAR_Calc_UV_Spec.zip.pdf (1.2 MB)
Alternatively, if you’re experienced with c/c++, you can extract the raw data from the first two columns in the spreadsheet and run it through the source code I have over here:
The Caldwell expression is already coded though unused / untested in the following function within that source
double spectrum::calculate_flint_action_spectra(double wavelength)
In addition, there are a couple of other routines in there as well
double spectrum::calculate_caldwell_action_spectra(double wavelength)
You’d need to call such routines and apply the action spectra to the calculated irradiance by wavelength (data from the first couple of columns extracted from the spreadsheet). And example where that is performed is in the calculation of PAR and YPF action spectras.
Same can be done in the excel spreadsheet but it’s more difficult to comprehend since it’s just my working spreadsheet and not intended to send around, work backwards from the graphs within the first sheet to see how the PAR or YPF masks work.
Also, if you haven’t seen, here is some general spectrometer results that were the output from the excel worksheets and the source code, over here: