Good Afternoon All,<br><br>I'm running into something which I don't quite understand while trying to display some GFS data which I get from the NCEP FTP site (<a href="ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2008121900/">ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2008121900/</a>). If this is a known issue or if I am doing something wrong, I apologize.<br>
<br>In order to get the data in a format GrADS can handle I create a CTL file using g2ctl and then convert the data using gribmap for each file individually. When attempting to display data that is a valid for a year that is different than a file opened before it I will get an error like the one at the end of this email. In that particular example I open the 20081219 00Z GFS fcst files for forecast hours 300 (gfs.t00z.pgrbf20081219300.grib2) and 312 (gfs.t00z.pgrbf20081219312.grib2) - which are valid for 12Z 20081231 and 00Z 20090101 respectively - and I can display any variable from the first file fine. However, as soon as I attempt to display a variable from the second file I get an error. If I restart grads and open fcst hrs 312 and 324, I can display variables without any problems. <br>
<br>As a sanity check I tried this example with the 00Z run on 20081218. If I attempt to open files which span different years (in this case 324 and 336) I get the same results. Is there something I am doing wrong or is there anyway around this?<br>
<br>Thanks in advance.<br><br>Cheers,<br>Matt<br><br>[ops@ops1 crt_gfs_weekly_snow_plots]$ grads -lb<br><br>Grid Analysis and Display System (GrADS) Version 2.0.a3<br>Copyright (c) 1988-2008 by Brian Doty and the<br>Institute for Global Environment and Society (IGES)<br>
GrADS comes with ABSOLUTELY NO WARRANTY<br>See file COPYRIGHT for more information<br><br>Config: v2.0.a3 little-endian readline printim grib2 netcdf hdf4-sds<br>Issue 'q config' command for more information.<br>GX Package Initialization: Size = 11 8.5<br>
Running in Batch mode<br>ga-> open /data/maps/grads_data/20081219/gfs.t00z.pgrbf20081219300.ctl<br>Scanning description file: /data/maps/grads_data/20081219/gfs.t00z.pgrbf20081219300.ctl<br>Data file /data/gfs_grib_data/grib/200812_grib_data/gfs.t00z.pgrbf20081219300.grib2 is open as file 1<br>
LON set to 0 360<br>LAT set to -90 90<br>LEV set to 1000 1000<br>Time values set: 2008:12:31:12 2008:12:31:12<br>E set to 1 1<br>ga-> open /data/maps/grads_data/20081219/gfs.t00z.pgrbf20081219312.ctl<br>Scanning description file: /data/maps/grads_data/20081219/gfs.t00z.pgrbf20081219312.ctl<br>
Data file /data/gfs_grib_data/grib/200812_grib_data/gfs.t00z.pgrbf20081219312.grib2 is open as file 2<br>ga-> d cinsfc.2<br>Data Request Error: Invalid grid coordinates<br> World coordinates convert to non-integer grid coordinates<br>
Variable = cinsfc.2 Dimension = 3<br> Error ocurred at column 1<br>DISPLAY error: Invalid expression<br> Expression = cinsfc.2<br>ga-><br><br><br><br><br><br>