problem with opening multiple NetCDF files
Karin Meier-Fleischer
karin.meier-fleischer at ZMAW.DE
Tue Jun 10 01:53:28 EDT 2008
Hi Pavel,
the XDEF, YDEF, ZDEF and TDEF needs the dimension names given in the
netcdf file, like
dset ^%y4-%m2.nc
options template
XDEF lon 360 linear -179.500000 1.00000
YDEF lat 181 linear -89.5000000 1.000000
ZDEF level 1 levels 0
TDEF time 12 linear 01apr2000 1mo
vars 8
aot 1 t,y,x
aot_land 1 t,y,x
aot_water 1 t,y,x
aot_dust 1 t,y,x
angst 1 t,y,x
small 1 t,y,x
medium 1 t,y,x
large 1 t,y,x
endvars
Cia, Karin
---------------------------------\\---------------------------------------
Karin Meier-Fleischer \\ Max-Planck-Institut fuer Meteorologie
Phone: +49-40-41173-431 \\ Abteilung Modelle & Daten
FAX: +49-40-41173-476 \\ Bundesstr. 53
Email: karin.meier-fleischer at zmaw.de \\ D-20146 Hamburg
http://www.mad.zmaw.de/ \\ Germany
---------------------------------------\\---------------------------------
On Mon, 9 Jun 2008, Pavel Kishcha wrote:
> Thank you. I have corrected the descriptor file accordingly but it does not
> help as GRADS still shows the same message:
>
> ga-> xdfopen data.ctl
> Scanning Descriptor File: data.ctl
> XDFopen Error: Missing or invalid dimension size.
> --> The invalid description file record is:
> --> xdef 360 linear -179.500000 1.00000
> The data file was not opened.
> ga-> open data.ctl
> Scanning description file: data.ctl
> Open Error: Invalid variable record
> --> The invalid description file record is:
> --> aot 1 t,y,x
> The data file was not opened.
>
> The corrected descriptor file data.ctl is as follows:
>
> dset ^%y4-%m2.nc
> options template
> XDEF 360 linear -179.500000 1.00000
> YDEF 181 linear -89.5000000 1.000000
> ZDEF 1 levels 0
> TDEF 12 linear 01apr2000 1mo
> vars 8
> aot 1 t,y,x
> aot_land 1 t,y,x
> aot_water 1 t,y,x
> aot_dust 1 t,y,x
> angst 1 t,y,x
> small 1 t,y,x
> medium 1 t,y,x
> large 1 t,y,x
> endvars
>
>
> On Mon, Jun 9, 2008 at 6:47 PM, M.Mahakur <mmahakur at tropmet.res.in> wrote:
>
>> what happens if you change "dset" to %m2 instead of %2m in your data.ctl??
>>
>> --
>> Open WebMail Project (http://openwebmail.org)
>>
>>
>> ---------- Original Message -----------
>> From: Pavel Kishcha <pavel at CYCLONE.TAU.AC.IL>
>> To: GRADSUSR at LIST.CINECA.IT
>> Sent: Mon, 9 Jun 2008 17:27:56 +0200
>> Subject: problem with opening multiple NetCDF files
>>
>>> Dear All,
>>>
>>> The problem comes about when I am trying to open multiple NetCDF files in
>>> GRADS.
>>> Here is my descriptor file (data.ctl):
>>>
>>> dset ^%y4-%2m.nc
>>> options template
>>> XDEF 360 linear -179.500000 1.00000
>>> YDEF 181 linear -89.5000000 1.000000
>>> ZDEF 1 levels 1000
>>> TDEF 24 linear 01apr2000 1mo
>>> vars 8
>>> aot 1 t,y,x
>>> aot_land 1 t,y,x
>>> aot_water 1 t,y,x
>>> aot_dust 1 t,y,x
>>> angst 1 t,y,x
>>> small 1 t,y,x
>>> medium 1 t,y,x
>>> large 1 t,y,x
>>> endvars
>>>
>>> ***When I run it in GrADS Version 1.9b4 by using the command xdfopen I
>> see
>>> the message:
>>>
>>> ga-> xdfopen data.ctl
>>> Scanning Descriptor File: data.ctl
>>> XDFopen Error: Missing or invalid dimension size.
>>> --> The invalid description file record is:
>>> --> xdef 360 linear -179.500000 1.00000
>>> The data file was not opened.
>>>
>>> ***When I run it by using the command open I see the message:
>>>
>>> ga-> open data.ctl
>>> Scanning description file: MISR_L3.ctl
>>> Open Error: Invalid variable record
>>> --> The invalid description file record is:
>>> --> aot 1 t,y,x
>>>
>>> What am I doing wrong?
>>> Thank you for all of your help.
>>>
>>> Cheers,
>>> Pavel
>>>
>>> P.S. Here are my files:
>>>
>>> 2000-04.nc
>>> 2000-05.nc
>>> 2000-06.nc
>>> …
>>> 2002-03.nc
>>>
>>> ***Here is the output from "ncdump -h" of 2000-04.nc
>>>
>>> [pavel at wind ~]$ /usr/local/bin/ncdump -h 2000-04.nc
>>> netcdf 2000-04 {
>>> dimensions:
>>> longitude = 360 ;
>>> latitude = 181 ;
>>> ftime = 1 ;
>>> variables:
>>> double longitude(longitude) ;
>>> longitude:units = "degree_east" ;
>>> longitude:standard_name = "longitude" ;
>>> double latitude(latitude) ;
>>> latitude:units = "degree_north" ;
>>> latitude:standard_name = "latitude" ;
>>> double ftime(ftime) ;
>>> ftime:units = "seconds since ??" ;
>>> ftime:standard_name = "ftime" ;
>>> double aot(ftime, latitude, longitude) ;
>>> aot:units = "kg m-2" ;
>>> aot:standard_name = "total_aerosol_optical_thickness" ;
>>> aot:coordinates = "ftime latitude longitude" ;
>>> double aot_land(ftime, latitude, longitude) ;
>>> aot_land:units = "kg m-2" ;
>>> aot_land:standard_name
>>> = "total_aerosol_optical_thickness" ;
>>> aot_land:coordinates = "ftime latitude longitude" ;
>>> double aot_water(ftime, latitude, longitude) ;
>>> aot_water:units = "kg m-2" ;
>>> aot_water:standard_name
>>> = "total_aerosol_optical_thickness" ;
>>> aot_water:coordinates = "ftime latitude longitude" ;
>>> double aot_dust(ftime, latitude, longitude) ;
>>> aot_dust:units = "kg m-2" ;
>>> aot_dust:standard_name
>>> = "atmosphere_content_of_dust_aerosol" ;
>>> aot_dust:coordinates = "ftime latitude longitude" ;
>>> double angst(ftime, latitude, longitude) ;
>>> angst:units = "None" ;
>>> angst:standard_name = "angstrom_exponent" ;
>>> angst:coordinates = "ftime latitude longitude" ;
>>> double small(ftime, latitude, longitude) ;
>>> small:units = "kg m-2" ;
>>> small:standard_name
>>> = "aerosol_optical_thickness_due_to_small_particles" ;
>>> small:coordinates = "ftime latitude longitude" ;
>>> double medium(ftime, latitude, longitude) ;
>>> medium:units = "kg m-2" ;
>>> medium:standard_name
>>> = "aerosol_optical_thickness_due_to_medium_particles" ;
>>> medium:coordinates = "ftime latitude longitude" ;
>>> double large(ftime, latitude, longitude) ;
>>> large:units = "kg m-2" ;
>>> large:standard_name
>>> = "aerosol_optical_thickness_due_to_large_particles" ;
>>> large:coordinates = "ftime latitude longitude" ;
>>>
>>> // global attributes:
>>> :Conventions = "CF-1.0" ;
>>> :history = "Created Mon May 5 15:55:49 2008 by mikeb" ;
>>> :comment = "??" ;
>>> :source = "IMPACT model v??" ;
>>> :references = "??" ;
>>> :institution = "Los Alamos" ;
>>> :title = "AOT global grid for total, dust, angst, small,
>>> medium, large" ;
>>> }
>> ------- End of Original Message -------
>>
>
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