Hi Dave (and Pat)- > I am bring in Dr. Pat Market of Missouri to our thread, as he is the one > who introduced me to IDV and is much further along on the learning > curve. > > Here, we are using the NAM from the motherlode. > > What would be great is to be able to plot winds actually on the > isentropic surface so that we could more accurately infer/analyze > upglide.... Do you need this in 3D or does a 2D plot suffice. > Right now we are using the 3d isentropic surface colored by RH. But in > order to infer upglide we are having to plot the wind fields on the > pressure surfaces. This is OK but it would be much better to actually > just have the wind field plotted in isentropic coordinates. It will be a while before the IDV can do this interpolation itself. As I mentioned, the IDV can plot the GEMPAK isentropic grids. Some Unidata sites run the GEMPAK GDVINT program to convert the realtime grids to isentropic coordinates. These could be served up on a THREDDS Data Server by Pat's department and read into the IDV. I know they get the grids via LDM and run GEMPAK. I've attached a display of pressure and winds on the 288 K surface from a GEMPAK file created by GDVINT. Is that the type of display you are looking for? > Pat, I hope that you feel that I have explained this well enough. > > Thanks everyone for a great product, and for being willing to help make > it better! Don > -----Original Message----- > From: Unidata IDV Support [mailto:address@hidden] > Sent: Saturday, November 15, 2008 9:48 AM > To: WeatherLab > Cc: address@hidden > Subject: [IDV #PLQ-498677]: loading trouble > > Hi Dave- > > This is Don instead of Jeff. > > > > So....can I put in a development request? Sure would be great to be > > > able to use the isentropic coordinate system so we could actually > see > > > wind on that isentropic layer! > > > > > > > > > You're not the only one that would like that. Its something on our > todo list > > and we're starting to figure out how to do this. > > What is the format of your isentropic grids? If they are GEMPAK > grid files, you can display them in 2D in the IDV already. The > THETA axis just gets mapped linearly to the altitude axis. That > seems to be what most people who use isentropic coordinates want > anyway. We will be improving the displays, but some of what you > want can be done now. Just read in the grid and plot as plan > views. > > If it is in some other format (netCDF, Grib, etc), please provide > us a sample file. Having the IDV automatically compute the > isentropic grids from the pressure grids is another matter and > would require a lot more work. But it is something we have to > tackle in the long run. > > Don Murray > > Ticket Details > =================== > Ticket ID: PLQ-498677 > Department: Support IDV > Priority: Normal > Status: Open > > Ticket Details =================== Ticket ID: PLQ-498677 Department: Support IDV Priority: Normal Status: Open
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