Re: [idvusers] time loop issues

Hi Dan-

On 2/8/12 4:04 PM, Tyndall, Dr. Dan, Contractor, Code 7531 wrote:
Don,

Sorry for taking so long in getting back to you--I've had to deal with some 
other things, so this got lower priority. I tried the methodology you suggested 
below, but I'm still getting an error:

Creating display: Contour Plan View
java.lang.NullPointerException

I attempted to aggregate by time once more, and I'm getting slightly different 
behavior now--the grids are loading, but one on top of another--they aren't 
shifting location like they should as the hurricane moves (the shifting does 
show up if the grids are loaded individually). I've uploaded the files to the 
motherlode server, as 2010083100_earl.tar. It contains 3 forecast hours, which 
should be enough to test the time stepping. I've created the NetCDF files 
myself, so it is possible that I'm not setting something up properly when I 
create the files.

Thanks again for looking into this.

Thanks for the samples. I don't know when I'll have time to look at this (IDV is not my real job. ;-)), but I'll alert the crack IDV support team so they can take a look.

Don

Dr. Daniel P. Tyndall
NRC Postdoctoral Research Associate
United States Naval Research Laboratory
7 Grace Hopper Avenue Stop #2
Monterey, CA 93943
Phone: (831) 656-4054 - Fax: (831) 656-4769 - Email: 
dan.tyndall.ctr@xxxxxxxxxxxxxxx


-----Original Message-----
From: idvusers-bounces@xxxxxxxxxxxxxxxx 
[mailto:idvusers-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Don Murray
Sent: Friday, February 03, 2012 5:31 PM
To: idvusers@xxxxxxxxxxxxxxxx
Subject: Re: [idvusers] time loop issues

Hi Dan-

On 2/3/12 4:17 PM, Tyndall, Dr. Dan, Contractor, Code 7531 wrote:
Hello fellow IDV users,

I'm having issues with the time looping in IDV. I have a bunch of NetCDF files 
with individual forecast hours, and I would like to be able to use the playback 
controls to be able to step through the grids. Unfortunately, the grids will 
stay up on the screen when they shouldn't.

I've already tried the "aggregate grids by time" option, which works
to a point--provided the grid doesn't change, I can use the playback
controls. However, if I have a nest following a hurricane, IDV fails
to load the data. Are there any workarounds for this? I've found this
issue come up in the IDVusers archive, although, they were brought up
a while ago, so I am hoping there has been an update to the code to
fix this. Thanks,

I'm not sure if this will work, but load in each dataset individually and then use the 
Forumala->Grid->Time Steps->Merge time sequences formula and select each 
dataset.

"Aggregate grids by time"  uses netCDF-Java aggregation via NcML which
assumes that all grids have the same spatial domain.   If there is only
one timestep per grid, the IDV will show the timestep on all frames.  If the 
above suggestion doesn't work, could you could package up the files in a zip 
file and upload to:

http://motherlode.ucar.edu/repository/alias/idvupload

and someone could look into a solution.

Don
--
Don Murray
NOAA/ESRL/PSD and CIRES
303-497-3596
http://www.esrl.noaa.gov/psd/people/don.murray/

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--
Don Murray
NOAA/ESRL/PSD and CIRES
303-497-3596
http://www.esrl.noaa.gov/psd/people/don.murray/