[gradsusr] Problem Opening NetCDF File Using Control File

[Adam Frumkin]

Hello All,

This problem has been solved by altering the control file to look like:

dset ^precip.nc
options 365_day_calendar
dtype netcdf
TDEF time 1872 LINEAR 00:00Z01JAN1850 1mo

and then opening in GrADS using xdfopen.

Thank you



>
> Message: 3
> Date: Wed, 22 Jun 2011 17:35:54 -0400
> From: Adam Frumkin <ajf09f at fsu.edu>
> Subject: [gradsusr] Problem Opening NetCDF File Using Control File
> To: gradsusr at gradsusr.org
> Message-ID: <BANLkTimP7=TYxPOubxQeL3ReuR7Ncho7vg at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello all,
>
> I am experiencing an error when I attempt to open a NetCDF file with a
> control file.
> The netcdf file contains total precipitation data from CCSM4 downloaded from
> ESG.
> I am using GrADS version 2.0.a9 on Unix.
>
> *The error I receive from GrADS when i attempt to plot the total
> precipitation variable (PRECT) is:*
>
> *Error: Variable prect not in netcdf file **<----This is what has me
> confused*
> *Data Request Error:  Error for variable 'prect'*
> * Error ocurred at column 1*
> *DISPLAY error:  Invalid expression *
> * Expression = prect*
> *
> *
> Any help in identifying why this error is occurring would be
> greatly appreciated. Below I will paste the control file I am using and
> below that, some of the output from ncdump -c proving that, despite what
> GrADS is telling me, my variable should exist in the file:)
>
> *First the control file (a shortened version):*
>
> *DSET ^precip.nc*
> *DTYPE netcdf*
> *TITLE Total Precipitation Rate*
> *UNDEF -1.e+34*
> *OPTIONS 365_day_calendar*
> *XDEF 288 levels 0 1.25 ...(I left out the rest to keep it short)*
> *YDEF 192 levels  -90 -89.0575916230366 ...(again left out the rest to keep
> it short)*
> *ZDEF 1 levels 0*
> *TDEF 1872 linear JAN1850 1mo*
> *VARS 1*
> *PRECT 0 t,y,x  Precipitation (m/s)*
> *ENDVARS*
>
> *Below is some of the output of ncdump*
>
> *netcdf precip {*
> *dimensions:*
> * time = UNLIMITED ; // (1872 currently)*
> * lat = 192 ;*
> * lon = 288 ;*
> * chars = 8 ;*
> * ilev = 27 ;*
> * lev = 26 ;*
> * isccp_prs = 7 ;*
> * isccp_prstau = 49 ;*
> * isccp_tau = 7 ;*
> * slat = 191 ;*
> * slon = 288 ;*
> * tbnd = 2 ;*
> *
> *
> *variables:*
> * double P0 ;*
> * P0:long_name = "reference pressure" ;*
> * P0:units = "Pa" ;*
> * float PRECT(time, lat, lon) ;*
> * PRECT:units = "m/s" ;*
> * PRECT:long_name = "Total (convective and large-scale) precipitation rate
> (liq + ice)" ;*
> * PRECT:cell_method = "time: mean" ;*
> *
> *
> *// global attributes:*
> * :Conventions = "CF-1.0" ;*
> * :source = "CAM" ;*
> * :case = "b40.20th.track1.1deg.008" ;*
> * :title = "UNSET" ;*
> * :logname = "mai" ;*
> * :host = "be0801en.ucar.ed" ;*
> * :Version = "$Name$" ;*
> * :revision_Id = "$Id$" ;*
>
>
> Thanks in advance.
>
>
>
> --
> Adam J. Frumkin
> 2035 E. Paul Dirac Dr.
> 200 RM Johnson Bldg.
> Cubicle B-3 COAPS
> Tallahassee, FL 32306-2840
> Cell Phone (603) 247 - 3914
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-- 
Adam J. Frumkin
2035 E. Paul Dirac Dr.
200 RM Johnson Bldg.
Cubicle B-3 COAPS
Tallahassee, FL 32306-2840
Cell Phone (603) 247 - 3914