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<DIV><FONT color=#c0c0c0 size=2 face=Verdana>2009-09-18 </FONT></DIV><FONT
color=#000080 size=2 face=Verdana>
<HR style="WIDTH: 100px" align=left color=#b5c4df SIZE=1>
</FONT>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana><SPAN>Yan Libin</SPAN>
</FONT></DIV>
<HR color=#b5c4df SIZE=1>
<DIV><FONT size=2 face=Verdana><STRONG>发件人：</STRONG> yi zhou </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>发送时间：</STRONG> 2009-09-18 00:31:19
</FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>收件人：</STRONG> GRADSUSR </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>抄送：</STRONG> </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>主题：</STRONG> Display NARR </FONT></DIV>
<DIV><FONT size=2 face=Verdana></FONT> </DIV>
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<DIV>Hi Group members,<BR><BR>Could you please help me to solve the
problem? <BR><B><SPAN
style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt" lang=EN-US>My
grads version: Grads2.0a3 under Window XP 2002</SPAN></B><BR><BR>Now I am
encountering a problem when open a NARR 3hr data. In order to practice, I
download the data from NARR daily dataset website. the grib data name as:
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<![endif]--><B><SPAN
style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt" lang=EN-US><A
href="http://nomads.ncdc.noaa.gov/cgi-bin/ncdc-ui/define-collection.pl?model_sys=narr&model_name=narr-a&grid_name=221"
target=_blank></A> narr-a_221_20090912_0000_000.grd. I just
download one variable:hgtpre and one level: 500 hpa level. <BR>So I
change the ctl file as:
ls.ctl<BR>==============================<BR>dset ^ls.grb<BR>index
^ls.idx<BR>undef 9.999E+20<BR>title Select North American Regional
Reanalysis - 3hr time steps<BR>*<BR>* produced by grib2ctl
v0.9.12.5p33h modified by hand v1.0 WNE<BR>*<BR>dtype grib 221<BR>options
template</SPAN></B></DIV>
<DIV><B><SPAN style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt"
lang=EN-US>>>> delete above line<BR>pdef 349 277 lcc 1 -145.5 1 1
50 50 -107 32463 32463<BR>xdef 1111 linear -250 0.333333<BR>ydef 247
linear 8 0.333333<BR>tdef 1 linear 00:00Z12sep2009 3hr<BR>zdef 1 levels
500 <BR>*<BR>vars
1<BR>HGTprs 1
7,100,0 anl Geopotential height
[gpm]<BR>ENDVARS<BR>==================================<BR>And then I use
gribmap to create an index file: ls.idx<BR>So far every thing is ok. Then
I display hgtprs, the imformation shows as :<BR>=========<BR>ga->d
hgtprs<BR>Notice: Automatic Grid Interpolation Taking Place
<BR></SPAN></B><B><SPAN
style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt" lang=EN-US>Cannot
contour grid - all undefined values. </SPAN></B></DIV>
<DIV><B><SPAN style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt"
lang=EN-US>>>> notice it, all undefined!!!</SPAN></B><BR><B><SPAN
style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt"
lang=EN-US>==================<BR>Thanks in
advance.<BR><BR>Regards<BR><BR></SPAN></B><B><SPAN
style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt"
lang=EN-US><!--[if
!supportLineBreakNewLine]--></SPAN></B>Emily<BR><BR></DIV></TD></TR></TBODY></TABLE></FONT></DIV></BODY></HTML>