Re: [idvusers] How do you time step 3-hourly NARR data in the IDV?

Mike --

Thanks for the link.  Try this:

In the Chooser, select the individual .grb files (CTRL+click) and then
set the "Data source type" as "Aggregate grids by time"....that worked
nicely for me (I assuming that the data sets you want are the ones
under the dates, with names like:  "narr-b 221 20111229 2100
000.grb")...

tom

On Tue, Jan 3, 2012 at 10:43 AM, Mike Umscheid <mike.umscheid@xxxxxxxx> wrote:
> Thanks for the reply Tom,
>
> I am not having any luck with 2 or 3... but it does sound like I need to
> investigate option 1 as I am not all that familiar with NCML in combining
> datasets.  The NARR data I have been using is straight from the NARR catalog
> through the IDV
> (http://nomads.ncdc.noaa.gov/thredds/catalog/narr/catalog.xml).  So I guess
> what I would need to do then is save the individual hourly dataset as a
> local grid (*.nc) and then use one of the available tools (I see something
> called ToolsUI?) to merge the files into one netCDF?
>
> Mike U
>
>
> On Tue, Jan 3, 2012 at 9:50 AM, Tom Whittaker <whittaker@xxxxxxxx> wrote:
>>
>> Hi Mike...
>>
>> The display rule is that if the data object has only one time, then it
>> is displayed along with all other "time steps"; hence, since both 18z
>> and 21z data have just one "time", they are displayed together.
>>
>> I'm not familiar with the NARR data or how you are loading it, but
>> there are a couple of ways to make individual time period data be
>> combined:
>>
>> 1. using NCML to logically combine times
>> 2. using the Chooser and picking more than one time/file using
>> SHIFT+click or CTRL+click
>> 3. using the Formula under "Miscellaneous -> Make a time sequence from
>> single time grids"
>>
>> Hope this helps.
>>
>> tom
>>
>> On Tue, Jan 3, 2012 at 9:13 AM, Mike Umscheid <mike.umscheid@xxxxxxxx>
>> wrote:
>> > IDV Users,
>> >
>> > I'm not sure how many of you interrogate NARR datasets on the IDV, but
>> > I'm
>> > doing more of it now through the IDV using bundles and ISL scripts.  One
>> > big limitation I am finding is that I cannot time step/animate through
>> > more
>> > than one data file on the Map View pane.  For instance, if you load in
>> > fields from an 18z file and then also a 21z file, the IDV just displays
>> > the
>> > 21z data right on top of the 18z data.  How do you configure the IDV
>> > such
>> > that for these hourly dataset files you can create animations and step
>> > back
>> > and forth through various times?  Any help/guidance is appreciated!
>> >  Thanks,
>> >
>> > Mike U
>> > _______________________________________________
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>>
>>
>>
>> --
>> Tom Whittaker
>> University of Wisconsin-Madison
>> Space Science & Engineering Center (SSEC)
>> Cooperative Institute for Meteorological Satellite Studies (CIMSS)
>> 1225 W. Dayton Street
>> Madison, WI  53706  USA
>> ph: +1 608 262 2759
>
>



-- 
Tom Whittaker
University of Wisconsin-Madison
Space Science & Engineering Center (SSEC)
Cooperative Institute for Meteorological Satellite Studies (CIMSS)
1225 W. Dayton Street
Madison, WI  53706  USA
ph: +1 608 262 2759