[CF-metadata] standard_name for coordinate variable corresponding to complex parts (real and imaginary)

From: Benno Blumenthal <benno>
Date: Fri, 25 Jun 2010 16:52:52 -0400

Hi Bryan,

Thanks for chiming in -- your comments are quite helpful.

As for

On Thu, Jun 24, 2010 at 6:45 AM, Bryan Lawrence
<bryan.lawrence at stfc.ac.uk> wrote:

> However, despite the discussion thus far, I'm not entirely sure I
> understand exactly what Benno is proposing, not least because there are
> different ways of arranging FT components in an array - or exactly what
> Jonathan is implying for spherical harmonics.

My original proposal was

Add a standard_name complex_parts to "tag" the dimension that
corresponds to complex parts.


so that we could tag a coordinate variable of a real-valued netcdf
variable as corresponding to the real/imaginary direction, e.g.
complex sst(C,X,Y,F) would have

dimensions:
        C = 2;
        Y = 30 ;
        X = 84 ;
        F = 399 ;
variables:
        integer C(C) ;
                C:standard_name = "complex_parts" ;
        float Y(Y) ;
                Y:standard_name = "latitude" ;
                Y:units = "degree_north" ;
        float X(X) ;
                X:standard_name = "longitude" ;
                X:units = "degree_east" ;
        float F(F) ;
                F:standard_name = "frequency" ;
                TFunits = "1/sec" ;
        float ssta(Y, X, F, C) ;
                ssta:long_name = "Sea Surface Temperature Anomaly" ;


The conversation then got rapidly more complicated.

-- 
Dr. M. Benno Blumenthal          benno at iri.columbia.edu
International Research Institute for climate and society
The Earth Institute at Columbia University
Lamont Campus, Palisades NY 10964-8000   (845) 680-4450

Received on Fri Jun 25 2010 - 14:52:52 BST