error in ctl file

[anushri dutta]

Respected sir,

actually data is at
0.5 x 0.5 degree resolution, so nx=193 and ny=52

with regards

anushri


On 2/4/09, Madhusoodanan M.S. <madhusoodanan at gmail.com> wrote:
>
> Anushri,
>
> your output (tauxobs.grd) should have 192*51*24*4 bytes (your grid size is
> 1degx1deg).
>
> there could be errors in the .ctl file of tauxobs.grd.
>
> cheers,
> Madhu
>
> 2009/2/4 anushri dutta <anushridutta01 at gmail.com>
>
>> Respected Sir,
>> the command which I am using is the
>>
>> 'reinit'
>> 'sdfopen taux.cdf'
>> 'set gxout fwrite'
>> 'set fwrite tauxobs.grd'
>> 'set x 129.5 320.5'
>> 'set y 121.5 171.5'
>> 'set z 1'
>> 'set t 1 24'
>> 'd taux'
>> 'disable fwrite'
>>
>> and the data length in tauxobs.grd is 193*52*24*4, where nx=193, ny=52,
>> and t=24,
>> so, where is the error in file i am not getting it, that is it display the
>> variable for only time t=1, not for the other time,
>> please help me.
>>
>> with redgards
>>
>> anushri
>>
>>
>> On 2/4/09, Douglas Clark <dbcl at ceh.ac.uk> wrote:
>>>
>>> Anushri,
>>>
>>> It's difficult to know what the problem is unless you give more
>>> information about how you created the file!
>>>
>>> There's potentially quite a lot of information that you need to provide,
>>> but the following at least would be useful:
>>> * the script or commands that you used to perform the fwrite, and what
>>> GrADS output to the screen when you did this
>>> * the ctl file you created for the output
>>> * the results of the command "ncdump -h taux97-98.cdf" (if you have the
>>> ncdump utility)
>>>
>>> In the meantime, is it possible that you only wrote out 1 time of the
>>> netCDF file? How big is the file tauxobs.grd (e.g. ls -l in Unix)? If the
>>> grid is of size nx*ny points, one year of monthly data should give a file of
>>> size nx*ny*12*4 bytes. If your file is smaller, you haven't written all
>>> times, so repeat the fwrite stage after 'set t 1 12' (or whatever is
>>> appropriate). Try this first!
>>>
>>> Doug
>>>
>>>
>>> >>> anushridutta01 at GMAIL.COM 04/02/2009 07:20 >>>
>>> Dear Grads User,
>>> Hi,
>>> here I am facing a problem, that i want to write a binary data for
>>> the 12 month by data taux97-98.cdf, through fwrite function,
>>> but when I pot the data through ctl file,
>>> it display for a single month, not for all the months,
>>> and the error which it showing is
>>>
>>> ga-> open taux.ctl
>>> Scanning description file:  taux.ctl
>>> Data file tauxobs.grd is open as file 1
>>> LON set to 64.5 160
>>> LAT set to -15 10
>>> LEV set to 1 1
>>> Time values set: 1997:1:1:0 1997:1:1:0
>>> ga-> set t 1
>>> Time values set: 1997:1:1:0 1997:1:1:0
>>> ga-> d taux
>>> Contouring: -0.08 to 0.08 interval 0.02
>>> ga-> set t 2
>>> Time values set: 1997:2:1:0 1997:2:1:0
>>> ga-> d taux
>>> Low Level I/O Error:  Read error on data file
>>> Data file name = tauxobs.grd
>>> Error reading 192 bytes at location 313344
>>> Data Request Error:  Error for variable 'taux'
>>> Error ocurred at column 1
>>> DISPLAY error:  Invalid expression
>>> Expression = taux
>>>
>>>
>>> same as for the 3 to 12 month,
>>>
>>> I am not understanding why it is so,
>>> Please tell me, how do I achieve this,
>>>
>>> with regards
>>>
>>> anushri
>>>
>>>
>>> --
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>>>
>>
>>
>
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