[IDV #YGA-505055]: Unable to load dual-pol radar

Greetings Becky,

>
> Hmmm...it's that level 2 dual-pol data from NCDC that I'm interested
> in.  However, NCDC (from that same website -
> http://www.ncdc.noaa.gov/nexradinv/chooseday.jsp?id=katx) lists all
> those dual-pol products as Level III.  I just tried to load a
> differential reflectivity file (N0X) into IDV and got the same "unable
> to handle this radar product" error.
>

If you download the level 2 ("base data") files (first choice in the list), the 
files you download will contain the dual-pol variables Differential 
Reflectivity, Correlation Coefficient, and Differential Phase - note that these 
are available as individual level 3 files, too, and are selectable from the 
list (but the IDV cannot read them yet). If you want something like the 
variable "hydrometeor classification", that's going to be found in the level 3 
data exclusively. If differential reflectivity / phase, and correlation 
coefficient are the only dual-pol data you are interested in viewing, then just 
download the level 2 base file, as it contains those variables.

> 
> So am I right in thinking IDV can only load recent dual-pol from the
> ADDE server?
>

The IDV can load recent dual-pol data from the ADDE server, as well as level 2 
data from our THREDDS server (motherlode.ucar.edu/thredds/) - both of these are 
options in the Dashboard under the "Data Choosers" tab -> Sat & Radar -> Radar 
-> NEXRAD - Remote *or* ADDE Level III Tab.

The IDV can also load level II dual-pol data from disk (the "level II (base 
data)" files from NCDC).

> 
> Thanks very much for all the help.
>

No problem :-)

Cheers,

Sean

> 
> Becky
> 
> On Tue, May 1, 2012 at 11:50 AM, Unidata IDV Support
> <address@hidden> wrote:
> > Hi Becky,
> >
> > We aren't sure what the WCT is doing to load the level III data from disk. 
> > However, we are actively (like, right this moment) working on getting this 
> > feature into the IDV.
> >
> > The IDV is able to load level 2 data form dual-pol radars from our THREDDS 
> > data server, as well as level 3 data from our ADDE server. However, these 
> > are limited to relatively recent data (~15 days level 2 from THREDDS, ~ 1 
> > day level 3 from ADDE).
> >
> > I also just checked, and the IDV is able to load level 2 data downloaded 
> > from NCDC. The level 2 data files from NCDC include Reflectivity, Radial 
> > Velocity, Spectrum Width, Differential Reflectivity, Correlation 
> > Coefficient, and Differential Phase. To request the level 2 data, visit:
> >
> > http://www.ncdc.noaa.gov/nexradinv/
> >
> > or use this specifically for KATX:
> >
> > http://www.ncdc.noaa.gov/nexradinv/chooseday.jsp?id=katx
> >
> > and select "Level II (Base Data)"
> >
> > I'll let you know when we are able to read level 3 from disk. Hopefully one 
> > of the options above will work for the moment.
> >
> > Cheers!
> >
> > Sean
> >
> >> Hmm.  I've been able to load dual-pol (Zdr, rho_hv, hydrometeor
> >> classification, etc.) data into WCT.  I attached an image of
> >> differential reflectivity from KATX.
> >>
> >> All of these products I obtained from the HAS NCDC website, which
> >> lists them as Level III products.
> >>
> >> On Fri, Apr 27, 2012 at 4:18 PM, Unidata IDV Support
> >> <address@hidden> wrote:
> >> >> Ah ha, interesting.  Which dual-pol products are level-2?  From the
> >> >> NCDC HAS website they all look to be level 3?
> >> >>
> >> >> Dual-pol does work with the WCT.
> >> >
> >> > As far as I know, WCT is still waiting for me to finish the level3 code. 
> >> > Both IDV and WCT rely on the same netCDF-Java library.
> >> >
> >> > Yuan
> >> >>
> >> >> Thanks, Becky
> >> >>
> >> >> On Fri, Apr 27, 2012 at 10:08 AM, Unidata IDV Support
> >> >> <address@hidden> wrote:
> >> >> >> Wow, that stinks.  Do you know of any other software that displays
> >> >> >> cross-sections of radar data, that can handle dual-pol?
> >> >> >>
> >> >> >> Also, if you guys could add a note that IDV doesn't support dual-pol
> >> >> >> yet to the webpage, or in the documentation somewhere, that would be
> >> >> >> nice.  Save folks some work.
> >> >> >>
> >> >> >> Thanks, Becky
> >> >> >>
> >> >> >> On Thu, Apr 26, 2012 at 5:03 PM, Unidata IDV Support
> >> >> >> <address@hidden> wrote:
> >> >> >> > Greetings Becky!
> >> >> >> >
> >> >> >> > The IDV does not handle dual-pol data at the moment, but it is on 
> >> >> >> > our list of things to do. I don't have an ETA on when it will be 
> >> >> >> > working, but I will send you a message once it's available.
> >> >> >> >
> >> >> >> > Cheers!
> >> >> >> >
> >> >> >> > Sean
> >> >> >> >
> >> >> >> >> Full Name: Rebecca Selin
> >> >> >> >> Email Address: address@hidden
> >> >> >> >> Organization: AER, Inc.
> >> >> >> >> Package Version: 3.0u2 build date:2012-02-10 17:21 UTC
> >> >> >> >> Operating System: Linux
> >> >> >> >> Hardware: Java: home: /usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0/jre 
> >> >> >> >> version: 1.6.0_20 j3d:1.5.2 fcs (build4)
> >> >> >> >> Description of problem:
> >> >> >> >>
> >> >> >> >> There was an error loading the data:
> >> >> >> >>
> >> >> >> >> Error creating data source:file.radar with: 
> >> >> >> >> /home/local/adamsr/dual-pol/KSEW_SDUS86_N0XLGX_201203270221
> >> >> >> >> null
> >> >> >> >> Unable to handle this radar product!
> >> >> >> >>
> >> >> >> >>
> >> >> >> >> I'm trying to load a dual-pol radar product from one of the new 
> >> >> >> >> WSR-88Ds .
> >> >> >> >> I've obtained differential reflectivity at one time from NCDC and 
> >> >> >> >> stored
> >> >> >> >> the file locally on my computer.  However, when I try to load the 
> >> >> >> >> file,
> >> >> >> >> I am given the above error.  Viewing composite reflectivity from 
> >> >> >> >> the
> >> >> >> >> same radar/time works just fine though.
> >> >> >> >>
> >> >> >> >> Do the dual-pol products work on IDV?
> >> >> >> >>
> >> >> >> >> Thanks, Becky
> >> >> >
> >> >> > Becky,
> >> >> >   To clarify a little here, the IDV do support dual-pol level 2 data, 
> >> >> > but not level 3 products. You can do cross section in the IDV too.
> >> >> >
> >> >> > Yuan
> >> >> >> >>
> >> >> >> >> ******************
> >> >> >> >> Stack trace:
> >> >> >> >> visad.VisADException: Unable to handle this radar product!
> >> >> >> >>
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.data.radar.CDMRadarAdapter.init(CDMRadarAdapter.java:496)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.data.radar.CDMRadarAdapter.<init>(CDMRadarAdapter.java:211)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.data.radar.CDMRadarDataSource.makeRadarAdapter(CDMRadarDataSource.java:670)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.data.radar.RadarDataSource$1.run(RadarDataSource.java:297)
> >> >> >> >> at visad.util.ThreadManager.runInParallel(ThreadManager.java:273)
> >> >> >> >> at visad.util.ThreadManager.runInParallel(ThreadManager.java:245)
> >> >> >> >> at visad.util.ThreadManager.runInParallel(ThreadManager.java:212)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.data.radar.RadarDataSource.makeAdapters(RadarDataSource.java:319)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.data.radar.RadarDataSource.getAdapters(RadarDataSource.java:251)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.data.radar.RadarDataSource.getRadarAdapters(RadarDataSource.java:631)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.data.radar.CDMRadarDataSource.doMakeDataChoices(CDMRadarDataSource.java:394)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.data.DataSourceImpl.getDataChoices(DataSourceImpl.java:1839)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.data.DataManager.createDataSource(DataManager.java:1579)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.idv.IntegratedDataViewer.createDataSource(IntegratedDataViewer.java:1980)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1897)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1831)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1804)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.idv.chooser.IdvChooser.makeDataSource(IdvChooser.java:943)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.idv.chooser.FileChooser.selectFilesInner(FileChooser.java:656)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.idv.chooser.FileChooser.selectFiles(FileChooser.java:525)
> >> >> >> >> at 
> >> >> >> >> ucar.unidata.idv.chooser.FileChooser.doLoadInThread(FileChooser.java:547)
> >> >> >> >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >> >> >> >> at 
> >> >> >> >> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> >> >> >> >> at 
> >> >> >> >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> >> >> >> >> at java.lang.reflect.Method.invoke(Method.java:616)
> >> >> >> >> at ucar.unidata.util.Misc$2.run(Misc.java:1062)
> >> >> >> >> at ucar.unidata.util.Misc$3.run(Misc.java:1090)
> >> >> >> >>
> >> >> >> >>
> >> >> >> >>
> >> >> >> >
> >> >> >> >
> >> >> >> > Ticket Details
> >> >> >> > ===================
> >> >> >> > Ticket ID: YGA-505055
> >> >> >> > Department: Support IDV
> >> >> >> > Priority: Normal
> >> >> >> > Status: Open
> >> >> >> >
> >> >> >>
> >> >> >>
> >> >> >
> >> >> >
> >> >> > Ticket Details
> >> >> > ===================
> >> >> > Ticket ID: YGA-505055
> >> >> > Department: Support IDV
> >> >> > Priority: Normal
> >> >> > Status: On Hold
> >> >> >
> >> >>
> >> >>
> >> >
> >> >
> >> > Ticket Details
> >> > ===================
> >> > Ticket ID: YGA-505055
> >> > Department: Support IDV
> >> > Priority: Normal
> >> > Status: Open
> >> >
> >>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: YGA-505055
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> 
> 


Ticket Details
===================
Ticket ID: YGA-505055
Department: Support IDV
Priority: Normal
Status: Open