[IDV #SLG-471030]: Repeat Elevation Angles Remote Level II Radar Data

["Unidata IDV Support" <support-idv@xxxxxxxxxxxxxxxx>]

> Hi:
> 
> Some thoughts ...
> 
> It looks like the sites transmitting super-resolution data will have the repeat 0.5, 0.9, 1.3 depending on the VCP.
> 
> Sites transmitting legacy data will not have the repeat elevation angles.
> 
> Sites that are transmitting recombined data I get the following error message:
> 
> There was an error loading the data ...
> java.lang.NullPointerException

You are right. We have not upgraded our library to deal with the recombined data, it is on the way and you can download the new nightly build in a couple days.

> 
> Also with the multiple scans at the same elevation angle does this affect RHI; isosurface; volume scan; etc displays?

We only use the first scans for v all 3D display, includeing RHI.
> 
> The reason for the original message was that I have never seen multiple elevation angles in level II data either from IDV (Level II remote) or obtained from the NWS and displayed using IDV.

Yes, the multiple elevation is only being applying in the super resolution or recombine level 2 data. Let me know if you need any help.

Thanks,

Yuan 
> 
> Thanks for listening ...
> 
> Have a good weekend ....
> 
> Greg ...
> 
> -----Original Message-----
> From: Unidata IDV Support [mailto:support-idv@xxxxxxxxxxxxxxxx]
> Sent: Fri 6/20/2008 4:18 PM
> To: Salottolo Greg
> Cc: support-idv@xxxxxxxxxxxxxxxx
> Subject: [IDV #SLG-471030]: Repeat Elevation Angles Remote Level II Radar Data
> 
> > Good Morning:
> >
> > Looking at PAH remote Level II data for this AM (see jpeg file). Displayed Base Reflectivity 0.5 degree elevation data. Left side first 0.5 degree elevation angle in field selector window for Reflectivity and right side second 0.5 degree elevation angle in field selector window for Reflectivity. More echo is showing in the first image. Not sure why different displays for the same elevation angle. The 2 instances of the 0.5 degree (also the 1.5 degrees) elevation angle do not show up in the Radial Velocity and Spectrum Width field selector window.
> >
> > Current VCP for PAH was 21 ... From ...
> >
> > http://www.roc.noaa.gov/ops/vcp.asp
> >
> >
> > Any help on this is appreciated.
> >
> >
> > Greg ...
> >
> Greg,
> There are many formal explanation of the radar VCPs, you can browse on the web to get the detail information. I can only give a brief summary here. First, the VCP for each radar station  is changed according to the weather condition. If the VCP for radar site PAH is 21, which means the precipitation mode. For some parameters at some levels, a radar may run more than one sweep according to the weather condition, such as two full sweeps at 0.5 for the reflectivity and only one sweep for the doppler velocity, and may even collect both parameters in the same sweep. And because of the difference in the time of each sweep, the signal in the same elevation can be difference. The design of each VCP is based on the requirements of meteorologist to analyze the structure of the weather system.
> 
> 
> Yuan
> >
> >
> > -----Original Message-----
> > From: Unidata IDV Support [mailto:support-idv@xxxxxxxxxxxxxxxx]
> > Sent: Thursday, June 19, 2008 5:34 PM
> > To: Salottolo Greg
> > Cc: support-idv@xxxxxxxxxxxxxxxx
> > Subject: [IDV #SLG-471030]: Repeat Elevation Angles Remote Level II
> > Radar Data
> >
> >
> > >
> > >
> > > >  -----Original Message-----
> > > > From: 	Salottolo Greg
> > > > Sent:	Thursday, June 19, 2008 4:06 PM
> > > > To:	'Unidata IDV Support'
> > > > Subject:	Repeat Elevation Angles Remote Level II Radar Data
> > > >
> > > > Good Afternoon:
> > > >
> > > > Using remote level II chooser getting repeat level II elevation angles (see image). 2.5 vista ..
> > > >
> > > > New VCP Coverage Patterns 211, 212, 221 ...?
> >
> > Scalottolo,
> > This is VCP 212. And it is super resolution Nexrad data file.
> >
> > > >
> > > > By the way the Cursor Readout Window is very useful with radar data.
> > > >
> > > > Thanks ...
> > > >
> > > > Greg ...
> > > >
> > > >
> > > > >  <<level2_repeat_ele_ang.jpg>>
> > > >
> > > Also getting this error ...
> >
> > Well, another new format, AR2V0004, believe it or not, it is new to me too. I just found out yesterday that this new format is coming and today it is actually in our distributing system IDD. I will need to make some changes to this new format.
> >
> > Yuan
> > >
> > > > >  <<level2.jpg>>
> > >
> > >
> > >
> > >
> > > >  -----Original Message-----
> > > > From: 	Salottolo Greg
> > > > Sent:	Thursday, June 19, 2008 4:06 PM
> > > > To:	'Unidata IDV Support'
> > > > Subject:	Repeat Elevation Angles Remote Level II Radar Data
> > > >
> > > > Good Afternoon:
> > > >
> > > > Using remote level II chooser getting repeat level II elevation angles (see image). 2.5 vista ..
> > > >
> > > > New VCP Coverage Patterns 211, 212, 221 ...?
> > > >
> > > > By the way the Cursor Readout Window is very useful with radar data.
> > > >
> > > > Thanks ...
> > > >
> > > > Greg ...
> > > >
> > > >
> > > > >  <<level2_repeat_ele_ang.jpg>>
> > > >
> > > Also getting this error ...
> > >
> > > > >  <<level2.jpg>>
> > >
> > >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: SLG-471030
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> >
> 
> 
> Ticket Details
> ===================
> Ticket ID: SLG-471030
> Department: Support IDV
> Priority: Normal
> Status: Open
> 
> 
> 


Ticket Details
===================
Ticket ID: SLG-471030
Department: Support IDV
Priority: Normal
Status: Open