Hi Jonathan,
Having packed data in the range 1024-1028 and using an add_offset of -1000
was John's suggestion. His point (I think) is that applications using this
data expect the unpacked values to be in the range 24-28.
Brian
On Thu, Aug 07, 2003 at 07:36:01PM +0100, Jonathan Gregory wrote:
> Dear Brian
>
> > By convention the units associated with a variable are the units of the
> > unpacked data. Using an add_offset of -1000 with packed data values of
> > 1024-1028 implies that the true values of density and potential density are
> > in the range 24-28 kg/m3, which is not correct.
>
> Would it not be the other way round? The density values are stored as numbers
> in the range 24-28 kg m-3 i.e. as sigma-theta, with add_offset of +1000. Once
> the offset has been added, they are values in the range 1024-1028, matching
> their standard name of sea_water_potential_density.
>
> Cheers
>
> Jonathan
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Received on Thu Aug 07 2003 - 12:56:55 BST
