<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On May 26, 2009, at 6:50 AM, Matias Mendez wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Hello GrADS users,<br><br>I got 3-h NARR data (u-wind and v-wind at 10m, air temperature at 2m,<br>mean sea level pressure) for the period 1979-2003, from this link:<br><br><a href="ftp://ftp.cdc.noaa.gov/Datasets/NARR/monolevel/">ftp://ftp.cdc.noaa.gov/Datasets/NARR/monolevel/</a><br><br>I constructed ddf files to open data. It worked well, I could open,<br>display and analize winds and temperature data. But when I tried to<br>display mean SLP data I got this error message:<br><br>ga-> d slp<br>Notice: Automatic Grid Interpolation Taking Place<br>gancsetup error: Variable slp not in netcdf file</div></blockquote><div><br></div><div>The variable in the file is called "prmsl" -- if you want to rename it to 'slp' you must create an alias in your descriptor file: </div><div>prmsl=>slp 0 t,y,x 3-hourly Pressure at Mean Sea Level</div><div><br>Same problem with glat and glon: </div><div>lat=>glat 0 y,x latitude coordinate</div><div>lon=>glon 0 y,x longitude coordinate</div><div><br></div><div>--Jennifer</div><div><br></div><blockquote type="cite"><div><br>Data Request Error: Error for variable 'slp'<br> Error ocurred at column 1<br>DISPLAY error: Invalid expression<br> Expression = slp<br><br>What does this mean?, how can I fix it?.<br><br><br>This is its DDF:<br><br>dset /home2/PROCLIMA/NARR/d-MSLP/prmsl.2003.nc<br>dtype netcdf<br>UNDEF -9999.0 missing_value<br>UNPACK scale_factor add_offset<br>PDEF 349 277 lcc 1 -145.5 1 1 50 50 -107 32463.41 32463.41<br>XDEF 1025 linear 150 0.2<br>YDEF 425 linear 2 0.2<br>ZDEF 1 levels 0<br>tdef 2920 linear 00z01jan2003 3hr<br>vars 3<br>slp 0 t,y,x MSLP 3hr<br>glat 0 t,y,x Latitude<br>glon 0 t,y,x Longitude<br>endvars<br><br><br>I'm using GrADS v1.9b4. I'll thank you so much your help.<br><br>Regards,<br>Matias<br></div></blockquote></div><br><div apple-content-edited="true"> <span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>--</div><div>Jennifer M. Adams</div><div>IGES/COLA</div><div>4041 Powder Mill Road, Suite 302</div><div>Calverton, MD 20705</div><div><a href="mailto:jma@cola.iges.org">jma@cola.iges.org</a></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span></span></div></span> </div><br></body></html>