This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Chance, If the program is not locating the data, be sure the NEXRIII template in $GEMTBL/config/datatype.tbl matches the file naming you are using at your site. Then, verify that your data dirrectories are current eg, look in $RAD/NIDS/AMA/N0R etc and make sure that the file times are within the 30 minute RADDUR window, or increate the window. Steve Chiswell Unidata User Support >From: "Chance Spencer" <address@hidden> >Organization: UCAR/Unidata >Keywords: 200202150011.g1F0B4x21913 >Steve, > >When I do run gdradr all it says is Writing grid to date/time which is the >current date and time and then it waits for 120 seconds or the RADFRQ and >then says Writing grid etc. again. However it does not list any of the >stations so I'm guessing that it isn't finding the radar data. I'm not sure >but when I run it next time I will try the things that you have suggested >and see if that helps. If not then it might not be locating the radar data >and in that case I'll have to talk to our network administrator and see if >we can't figure out why it isn't finding the data. Thanks. > >Chance > > >>From: Unidata Support <address@hidden> >>To: "Chance Spencer" <address@hidden> >>CC: address@hidden >>Subject: 20020214: gdradr, gdplot2 >>Date: Thu, 14 Feb 2002 16:49:29 -0700 >> >>Chance, >> >>It sounds like gdradr is either: >>1) not finding current radars within the 30 minutes (RADDUR) >> previous to the RADTIM >>or >>2) Not finding your radar data. >> >>When gdradr runs, it will list out to the screen the >>radars it is using, or if they are too old. I might >>need you to send me that output from the program. >> >>Verify that your radar data is within 30 minutes of current, or set >>RADTIM back to the time of your data. >> >>Steve Chiswell >>Unidata User Support >> >> >> >From: "Chance Spencer" <address@hidden> >> >Organization: UCAR/Unidata >> >Keywords: 200202142246.g1EMkNx19191 >> >> >Hello, >> > >> >I am trying to create a national mosaic using gdradr and gdplot2. I >>found >> >your tutorial page on gdradr and have tryed using some of those >>parameters >> >to create a gridded file. Gdradr seems to be able to create a file but >>when >> >I try to use gdplot2 to display it all I get is a screen with a color bar >> >over at the right hand side and a map of the U.S. with the highest >>intensity >> >color covering it. I am not sure if the parameters that I have set are >> >correct or not. The parameters for gdradr are: >> > >> >GRDAREA Area covered by grid 23.0;-120.0;47.0;-65.0 >> >PROJ Map projection/angles/margins|dr lcc/25;-103;60/3;3;0;0 >> >KXKY Number of grid points in x;y 720;500 >> >GFUNC Scalar grid n0r >> >GDFILE Grid file 20020208_22_radr.gem >> >RADTIM Radar composite current/dattim current >> >RADDUR Radar time window (minutes prior 30 >> >RADFRQ Update Frequency 2 >> >CPYFIL Grid file whose navigation is to >> >STNFIL Station information file nexrad.tbl >> >MAXGRD Maximum number of grids 200 >> >Parameters requested: >>GRDAREA,PROJ,KXKY,GFUNC,GDFILE,RADTIM,RADDUR,RADFRQ, >> >CPYFIL,STNFIL,MAXGRD. >> > >> > >> > >> >The parameters for gdplot2 are: >> > >> > >> > >> >GDFILE Grid file 20020208_22_radr.gem >> >GDATTIM Grid date/time last >> >GLEVEL Grid level 0 >> >GVCORD Grid vertical coordinate none >> >PANEL Panel loc/color/dash/width/regn 0 >> >SKIP Skip_cntr/skip_plt_x;skip_plt_y 0 >> >SCALE Scalar scale / vector scale 0 >> >GDPFUN Scalar grid or vector grid funct n0r >> >TYPE GDPLOT2 function processing type F >> >CONTUR Subbox/smooth 0 >> >CINT Contour interval/min/max >> >LINE Color/type/width/label/smth/fltr >> >FINT Fill interval/min/max >> >20;25;30;35;40;45;50;55;60;65;70;75 >> >FLINE Fill colors 0;21-23;20;18;17;15-7 >> >HILO Color/symbol/rng/rad/cnt/intp >> >HLSYM HILO txt size/posn/font/wdth/hw >> >CLRBAR Color/ornt/anch/x;y/ln;wd/freq >> >1/V/LL/0.001;0.15/0.82;0.010/1|1/1/ >> >1 >> >WIND Wind symbol/siz/wdth/typ/hdsz >> >REFVEC Mag;x;y;txtsiz/font/wdth/HW;labl >> >TITLE Title color/line/title 1/-1/~ Unidata 4km composite >> >TEXT Size/fnt/wdth/brdr/N-rot/just/hw 1/1/1 >> >CLEAR Clear screen flag n >> >GAREA Graphics area 22.0;-122.0;47.0;-65.0 >> >PROJ Map projection/angles/margins|dr lcc/25;-103;60/3;3;0;0 > >MAP Map color/dash/width/filter flag 1 >> >LATLON Line color/dash/width/label/inc 0 >> >DEVICE Device|name|x size;y size|color xw >> >STNPLT Txtc/txt attr|marker attr|stnfil >> >SATFIL Satellite image filename(s) >> >RADFIL Radar image filename(s) >> >LUTFIL Enhancement lookup table filenam >> >STREAM lines/arrows/stop/slow/scale >> >POSN Position 0 >> >COLORS Color list 1 >> >MARKER Marker color/type/size/width/hw 0 >> >GRDLBL Grid point label color 0 >> >FILTER Filter data factor YES >>Parameters requested: GDFILE,GDATTIM,GLEVEL,GVCORD,PANEL,SKIP,SCALE,GDPFUN, >> >TYPE,CONTUR,CINT,LINE,FINT,FLINE,HILO,HLSYM,CLRBAR,WIND,REFVEC,TITLE,TEXT, >> >CLEAR,GAREA,PROJ,MAP,LATLON,DEVICE,STNPLT,SATFIL,RADFIL,LUTFIL,STREAM,POSN, >> >COLORS,MARKER,GRDLBL,FILTER. >> > >> > >> >The file that gdradr is creating can be found by logging into >> >ariel.met.tamu.edu as anonymous and using e-mail as password. Once >>logged >> >in you can cd to the pub directory and use the >> >20020208_22_radr.gem file to try and plot on gdplot 2 to see if you know >> >what might be going on. I would appreciate any suggestions that you >>could >> >offer. Thank you for your time. >> > >> >Chance Spencer >> > >> > >> > >> > >> > >> > >> >_________________________________________________________________ >> >Get your FREE download of MSN Explorer at >>http://explorer.msn.com/intl.asp. >> > >> >>**************************************************************************** >>< >>Unidata User Support UCAR Unidata >>(303)497-8644 P.O. Box >>address@hidden Boulder, CO >>---------------------------------------------------------------------------- >>< >>Unidata WWW Service http://www.unidata.ucar.edu/ >>**************************************************************************** >>< > > > >_________________________________________________________________ >Send and receive Hotmail on your mobile device: http://mobile.msn.com >