Dear Bryan and Benno > I do *not* think it is appropriate to split the real and imaginary parts > into two variables, since one almost never uses just one or the other, > so it's a rather different case from splitting vector components.
I disagree still. Fourier transforms don't have to expressed as real and imaginary components, as you know. It can equivalently be done as amplitude and phase, and in that case it is much more likely you might use one without the other. Of course you need both to reverse the transformation, but for other purposes you might be interested in just one of them. Fourier transform components as amplitude and phase have different units and are, I would say, different kinds of geophysical quantity. I don't think it would be right to give them a common standard name and put them in the same data variable. Instead, consistent with what I suggested earlier, I think we should put them in separate data variables with standard names such as amplitude_of_fourier_transform_wrt_time_of_sea_surface_temperature phase_of_fourier_transform_wrt_time_of_sea_surface_temperature These variables have a coordinate of frequency. If it was a FT wrt longitude, they would have standard names with wrt_longitude instead of wrt_time, and a coordinate of, say, reciprocal_of_longitude. Best wishes Jonathan _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
