fwrite MM5 output

[Mary Jo Nath]

I believe that since your MM5 output data is defined:

  xdef  202 linear -157.44  0.0090
  ydef  133 linear   20.32  0.0090

then in your script you need to

 'set x 1 202'
 'set y 1 133'

(not
  'set x 1 201'
  'set y 1 132' as you have )


Mary Jo

On Thursday 28 July 2005 17:02, you wrote:
>>  Hello,
>>
>>  I am attempting to write MM5 output to a binary file that can be read by
>>  GRADS.  I only want to write the u and v component of the winds between
>> the 12th and 36th hour of the forecast run.  I've attached a portion of
>> the .ctl file that is produced using MM5toGrADS.
>>
>>  dset ^test24.dat
>>  byteswapped
>>  title MM5 data
>>  undef -9999.
>>  pdef   99   69 lcc   20.50 -157.20   14.00   11.00   30.00   60.00
>> -157.20 2000.   2000.
>>  xdef  202 linear -157.44  0.0090
>>  ydef  133 linear   20.32  0.0090
>>  zdef  28 levels
>>   0.99900
>>   0.99600
>>   0.99200
>>   0.98750
>>   0.98250
>>  tdef  49 linear 00:00Z24JUL2005  1hr
>>  vars 28
>>  u         28 99 u wind (m/s)
>>  v         28 99 v wind (m/s)
>>
>>  Here is a copy of my .gs file that I'm using to write the data:
>>
>>  'open test24.ctl'
>>  'set x 1 201'
>>  'set y 1 132'
>>  'set gxout fwrite'
>>  'set fwrite uv.dat'
>>  t=13
>>  while (t<=36)
>>  'set t 't
>>  'd u'
>>  'd v'
>>  t=t+1
>>  endwhile
>>
>>  The .ctl file that is used to read the uv.dat binary file is the
>> following:
>>
>>  dset ^uv.dat
>>  title wind data
>>  undef -9999.
>>  xdef  202 linear -157.44  0.0090
>>  ydef  133 linear   20.32 0.0090
>>  zdef  1 levels 0.99900
>>  tdef 24 linear 12:00Z24JUL2005   1hr
>>  vars 2
>>  u         0 99 u wind (m/s)
>>  v    0 99 u wind (m/s)
>>  endvars
>>
>>  So, the problem that I'm having is that I can write the data to the
>> binary file, but when I open up grads to display the data that I wrote the
>> plots are shifted or skewed.  The display at time t=1 is fine, but as I
>> move to t=5,6,7,etc.. the data becomes more skewed.  Please help!!