Hein,
As you discovered, the first suggestion we gave with NCML is incorrect, so
we would like to retract that solution.
Digging into this more deeply, the real problem is that this is swath type
data therefore the gridded spatial domains are not constant. These cannot
be aggregated along the time dimension. This is in contrast to, say,
typical model data which operates on constant grids with respect to time.
So, in conclusion, unfortunately, the IDV cannot to do what you wish
presently. We are making plans to better handle swath data which we aim to
do eventually.
Best,
Unidata IDV Support
On Wed, Jul 16, 2014 at 1:38 AM, Hein Zelle <hein.zelle@xxxxxxxxxxxxx>
wrote:
> Dear Julien Chastang,
>
> > We experimented with your data. The Conventions=CF-1.6 seems suspect.
> When
> > we removed that convention global attribute with NCML and loaded the data
> > in the IDV with the "Aggregate Grids by Time" Data Source Type, the data
> > seemed to be properly handled with respect to time.
>
> Thank you for your assistance. Could you double check if what I did
> is the same as what you did? I can't quite get it to work correctly yet:
>
> - Select multiple files
> - open as "aggregate grids by time"
> - I now get 1 data source with multiple time steps (good!)
> - plot true wind vectors as wind barb plan view
>
> I can now indeed scroll through time, but the 2nd, 3rd and
> following time steps all use the coordinate fields of the 1st time
> step. This is incorrect, as each swath has it's own coordinate
> fields!
>
> What's needed instead is that the longitude and latitude fields also
> have a time axis and vary in time. I've tried this, demo files are at
>
>
> http://freja.argoss.nl/file-exchange/with-time/ascat_bmta_2014-06-25_00:00.nc
>
> http://freja.argoss.nl/file-exchange/with-time/ascat_bmta_2014-06-25_01:00.nc
>
> http://freja.argoss.nl/file-exchange/with-time/ascat_bmta_2014-06-25_02:00.nc
>
> http://freja.argoss.nl/file-exchange/with-time/ascat_bmta_2014-06-25_03:00.nc
>
> However, when I add the time axis to the longitude and latitude fields
> I can't get the files to load as grids anymore. I've tried playing
> with the coordinates and featureType attributes, but no luck so far.
>
> Kind regards,
> Hein
>
> --
>
> Dr. Hein Zelle
> Senior consultant meteorology & oceanography
> BMT ARGOSS
>
> Tel: +31 (0)527-242299
> Fax: +31 (0)527-242016
> E-mail: hein.zelle@xxxxxxxxxxxxx
> Website: www.bmtargoss.com
>
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--
Julien Chastang
Scientific Software Developer
Unidata-UCAR
