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[IDV #QHL-990399]: Question About SREF Wind Plot

Hi Jacob-

> I am having trouble understanding the alias tool.  In dealing with dewpoint 
> temperature, would I need to make the program derive dewpoint from 
> temperature and relative humidity in the alias tool?  Could you help me get 
> dewpoint temperature from the SREF model?  Thanks!

You'll need to add an alias to TEMP for the temperature variable and RH for the
relative humidity variable.  You can get the names of the variables by mousing
over the name in the Field Selector.  For example, for the SREF weighted mean
if you mouse over the temperature variable, you'll see the tooltip shows:

Temperature_weightedMean21_pressure
Temperature_weightedMean21 @ pressure

The first is the actual field name which you would want to use.  Go to the
Tools->Parameter Alias Editor dialog, select the System aliases tab, find
the TEMP row and right click on it.  Select Copy to User's Table and in the
dialog that pops up, enter Temperature_weightedMean21_pressure on it's
own line in the bottom text area.  Do the same for RH and then reload the
data.  If you've done it correctly, you should see a derived quantity for
the Dewpoint under the Temperature->Derived pull fields.  See the User's
Guide for more information on Data Aliases at:

http://www.unidata.ucar.edu/software/IDV/docs/userguide/tools/AliasEditor.html

You can also get a list of the parameters using the Data Source Properties 
under the Details tab.

Don Murray

> -----Original Message-----
> From: Unidata IDV Support [mailto:address@hidden]
> Sent: Fri 5/8/2009 9:47 AM
> To: Gore, Michael J
> Cc: address@hidden
> Subject: [IDV #QHL-990399]: Question About SREF Wind Plot
> 
> Jacob-
> 
> > Hey, is there a way to derive 3D flow vectors from the SREF ensprod_biasc?  
> > The SREF under the Georesources server does not have any derived data like 
> > the GFS or NAM do.  The SREF model runs under the Experimental RAMADDA 
> > server has many 3D derived products for the SREF.  Is there a way I can 
> > implement desired derived products?
> 
> I added aliases for U and V for the WeightedAverage21 wind products
> and that is available in the latest nightly build.  That provides
> the derived wind products (vectors, speed, divergence).
> 
> You can use the Tools->Alias Editor to add aliases for any
> of the variable names.
> 
> Don Murray
> 
> > -----Original Message-----
> > From: Unidata IDV Support [mailto:address@hidden]
> > Sent: Sun 5/3/2009 9:36 AM
> > To: Gore, Michael J
> > Cc: address@hidden
> > Subject: [IDV #QHL-990399]: Question About SREF Wind Plot
> >
> > Hi Jacob-
> >
> > > Full Name: Jacob Gore
> > > Email Address: address@hidden
> > > Organization: Educational
> > > Package Version: 2.7a1 build date:2009-04-09 07:08 UTC
> > > Operating System: Linux
> > > Hardware: Java: home: /home/jacob/IDV_2.7a1/jre version: 1.6.0_07 
> > > j3d:1.5.2 fcs (build4)
> > > Description of problem: This is Jacob Gore with the former email address: 
> > > address@hidden.  I will be using this new email address, address@hidden 
> > > for now on.
> >
> > Thanks for letting us know.
> >
> > >I have a question    about displaying 3D wind data from the SREF model.  I 
> > >loaded a latest model run      from the Georesources catalog in the IDV 
> > >and attempted to download 3D wind plots  for the level 1000MB.  However, 
> > >there are only a select few levels available as           opposed to the 
> > >GFS or the NAM which have all levels.  The SREF only has 850MB and a few 
> > >others above that.  Is there a way that the SREF can display 1000MB Winds  
> > >     from 3D derived?  If so, how would I go about implementing this?
> >
> > I'm not sure what the difference between the two entries is, but
> > if you select the first set of data (enprod_biasc), it has more levels,
> > including 1000 millibar.  Select the weighted mean variables.
> > I'll look into the difference between them on Monday.
> >
> > Don
> >
> > Ticket Details
> > ===================
> > Ticket ID: QHL-990399
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> >
> >
> >
> 
> 
> Ticket Details
> ===================
> Ticket ID: QHL-990399
> Department: Support IDV
> Priority: Normal
> Status: Open
> 
> 
> 
> 


Ticket Details
===================
Ticket ID: QHL-990399
Department: Support IDV
Priority: Normal
Status: Open