[GEMPAK #XYG-194160]: NEXR2RHI image artifacts - what am I doing wrong?

NAWIPS/GEMPAK developers at NCEP said they have seen something similar in 
GDCROSS before, when selecting a grid cross-section, and it was caused then by 
an over-filled array, so that's likely the case with NEXR2RHI.  Unfortunately I 
won't be able to time on this until the middle of next week, so I'll try to get 
back to you Tues or Weds.  Sorry about the delay, we have a committee meeting 
on Monday and Tuesday which I'm swamped with at the moment.

Michael


> Michael,
> Any progress on this issue yet? I have PIs who are counting on being able to 
> use a GEMPAK script to create these cross-sections for a field campaign 
> starting in a few weeks.
> 
> Thanks,
> Greg
> 
> 
> On Mar 23, 2012, at 4:11 PM, Unidata GEMPAK Support wrote:
> 
> > Yikes, that indeed does look awful.  I'm seeing the same artifacts and 
> > turning interpolation off (INTERP=n) doesn't remove them all.
> >
> > Will update you when I know more.
> >
> > -Michael
> >
> >
> >
> >
> >> I'm trying to plot x-sections from the NEXRAD Level II radars of 
> >> reflectivity and I'm getting a lot of artifacts in the image that render 
> >> the product useless. Attached is a screen shot I created from data from 
> >> yesterday from the KHTX radar in Huntsville. Below are the values I used 
> >> in NEXR2RHI to create this plot:
> >>
> >> GEMPAK-NEXR2RHI>l
> >> CXSTNS   = 34.75;-86.6>33.5;-86.8
> >> GVCORD   = hght
> >> PTYPE    = lin
> >> YAXIS    = 0/20000
> >> CINT     = 0
> >> SCALE    = 0
> >> LINE     = 1
> >> BORDER   = 1
> >> TITLE    = 1/-2/RHI Base Reflectivity Level II ^
> >> CLEAR    = YES
> >> DEVICE   = XW
> >> TEXT     = 1
> >> PANEL    = 0
> >> CLRBAR   = 1
> >> CONTUR   = 3/2
> >> FINT     = 4/4/64
> >> FLINE    = 0;30-7
> >> CTYPE    = f
> >> RADFIL   = /export/ldm/data/gempak/nexrad/craft/KHTX/KHTX_20120322_2103
> >> RADPARM  = dz
> >> RADTIM   = last
> >> INTERP   = y
> >>
> >>
> >>
> >>
> >> I've tried different radars as well as different values (orientations) for 
> >> the cxstns parameter but most produce artifacts like those shown in this 
> >> image. What am I doing wrong?
> >>
> >> Thanks,
> >> Greg
> >>
> >> -----------------------------------------------------------
> >> Greg Stossmeister
> >> Head - Collaborative Tools and Metadata Group
> >> NCAR/Earth Observing Laboratory (EOL)
> >> Telephone: (303)497-8692  Facsimilie:(303)497-2044
> >> e-mail: address@hidden
> >> Mailing Address:          Shipping Address:
> >> NCAR/EOL                    UCAR Foothills Lab 1
> >> P.O. Box 3000               3450 Mitchell Ln
> >> Boulder, CO 80307      Boulder, CO 80301
> >> ------------------------------------------------------------
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: XYG-194160
> > Department: Support GEMPAK
> > Priority: Normal
> > Status: Open
> >
> 
> -----------------------------------------------------------
> Greg Stossmeister
> Head - Collaborative Tools and Metadata Group
> NCAR/Earth Observing Laboratory (EOL)
> Telephone: (303)497-8692  Facsimilie:(303)497-2044
> e-mail: address@hidden
> Mailing Address:          Shipping Address:
> NCAR/EOL                    UCAR Foothills Lab 1
> P.O. Box 3000               3450 Mitchell Ln
> Boulder, CO 80307      Boulder, CO 80301
> ------------------------------------------------------------
> 
> 
> 
> 
> 
> 

Ticket Details
===================
Ticket ID: XYG-194160
Department: Support GEMPAK
Priority: High
Status: Open