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Hi Mike-I can reproduce your problem with the NARR-A files and think it's a problem caused by there being multiple time dimensions in the NARR-A files since I had a similar problem with another dataset. If you load in a single file, you'll see that there are two times - the analysis time and a 6 hour forecast time. The latter is probably from the precip grids which are an accumulation from the initial time.
I suggest sending a note to support-idv@xxxxxxxxxxxxxxxx and they can work with the netCDF-Java developers on a solution.
I was going to say that the only (painful) workaround would be to load in each grid individually and then use the Grids->Time Steps->Merge time sequences Formula and select the individual grids from each file when the Field Selector comes up. You would select the parameter and then the analysis time (and level), then click Add selected, and then select the same from the next file. When you've selected them all, then click OK.
However, due to a recent change, this throws an error. I'll submit a ticket on that problem.
Don On 1/3/12 10:25 AM, Mike Umscheid wrote:
Oh wow, I never even considered that drop down box in the Chooser! That's exactly what I am looking for. I am able to aggregate successfully using the narr-b files like you said... however, the narr-a files which have the 3D fields, are not being parsed correctly or something. After loading the aggregated grids and doing a right-click Properties>> Times, I see all the aggregated times, but when you go and select any of the fields (either 2D or 3D), the Times tab only displays one default time instead of the total number of aggregated times. I wonder if this is a software bug?? Try doing the same thing for the narr-a files and see if you can duplicate this... Mike U On Tue, Jan 3, 2012 at 10:58 AM, Tom Whittaker<whittaker@xxxxxxxx> wrote: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 NARRcatalogthrough the IDV (http://nomads.ncdc.noaa.gov/thredds/catalog/narr/catalog.xml). So Iguesswhat 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 seesomethingcalled 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.Onebig 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 justdisplaysthe 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 _______________________________________________ idvusers mailing list idvusers@xxxxxxxxxxxxxxxx For list information, to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/-- 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_______________________________________________ idvusers mailing list idvusers@xxxxxxxxxxxxxxxx For list information, to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/
-- Don Murray NOAA/ESRL/PSD and CIRES 303-497-3596 http://www.esrl.noaa.gov/psd/people/don.murray/
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