[gradsusr] How to read CMORPH data

Wed Feb 6 10:00:07 EST 2013

Dear Marwan,

     I only see the .ctl file and a screenshot in the attachment; there 
is no binary file attached.  However, the file name is not the standard 
file name for CMORPH files...where are you getting the file from?

     Also, please delete the 'template' entry from OPTIONS.  I don't see 
a need for it and it will keep GrADS from informing you that the source 
file is missing.

Cheers,
Bob
> Dear Bob,
> I really value your help however I am not sure why is this ctl file 
> would not work with the binary file that I have included also in the 
> attachment.
> Is there is anyway I can change this file into NetCDF or Ascii file, 
> which I know how to use.
> If you could take a look at the files, and tell me what I am doing wrong.
> Also, you could see the error message
> P.S.
> PC user ( cygwin)
> *From:* Bob Kuligowski - NOAA Federal <mailto:bob.kuligowski at noaa.gov>
> *Sent:* Monday, February 04, 2013 6:03 AM
> *To:* gradsusr at gradsusr.org <mailto:gradsusr at gradsusr.org>
> *Subject:* Re: [gradsusr] How to read CMORPH data
> Dear Marwan,
>
>     My .ctl file is attached.  It assumes that the target file is 
> located in the same directory as the .ctl file. Please make sure that 
> the file name in the DSET entry is exactly the same as the file you 
> are using.
>
>     You should not need to define the contour line values at all to 
> get the display to work; I didn't need to do that.  However, you will 
> want to multiply the value of 'cmorph' by 0.2 in order to get units of 
> mm/h.
>
> Cheers,
> Bob
>
>> Dear Bob,
>> I have followed the steps you have suggested and I was able to open 
>> the file only, yet I could not display of the input file. I am still 
>> getting the same error message.
>> "entire grid undefined"
>> In step two:
>> DSET entry: I could not find the typo error "intrp" to " interp"
>> If you could send me the corrected ctl file to try it will be great.
>> Do I need to define each contour line value to enable me display?
>>
>> Best rgards,
>> Marwan
>> *From:* Bob Kuligowski - NOAA Federal <mailto:bob.kuligowski at noaa.gov>
>> *Sent:* Friday, February 01, 2013 6:04 AM
>> *To:* gradsusr at gradsusr.org <mailto:gradsusr at gradsusr.org>
>> *Subject:* Re: [gradsusr] How to read CMORPH data
>> Dear Marwan,
>>
>>     I just tried it and got the same result, but I was able to fix it 
>> and make it work.  You will need to make four changes in the .ctl file:
>>
>>  1. DSET entry: Put your data path in the "your-data-set-path" section.
>>  2. DSET entry: Change "intrp" to "interp" in the file name (it's a
>>     typo and I just notified the developer).
>>  3. DSET entry: Put the date of the file you're interested in in the
>>     "%y4%m2%d2%h2" part.
>>
>> (To summarize the first three points, the file name in the DSET entry 
>> should EXACTLY match the name of the file you're trying to plot).
>>
>>  1. If your machine is little Endian rather than big Endian, change
>>     the OPTIONS entry from "big_endian" to "little_endian".  (If
>>     you're not sure, just try both.  The bad one will give you
>>     nonsensical values).
>>
>>     One other suggestion is to get rid of the "template" option in 
>> the OPTIONS entry.  It has its uses, but one of the bad things about 
>> it is that it stops GrADS from giving an error message if it can't 
>> find the actual file (hence it didn't yell about any of the issues in 
>> changes 1-3 which kept it from finding the file) and it kept me from 
>> realizing the problem sooner.
>>
>> Cheers,
>> Bob
>>> Hi NICK and Bob,
>>>
>>> I am deeply thankful for all of your help and support but could you give me a reason why l am getting this error message ^entire grid undefined ^
>>>
>>> IS it becuase i did not set the range of vlues if not could anyone help me with that as in script or code
>>>
>>> Nicholas Grahammailto:ngraham at hrc-lab.org  wrote:
>>>
>>> Hello Marwan,
>>>
>>>   From looking at a fortran The CMORPH data files are flat (only data)
>>> files - the data are big-endian 4-byte floating point numbers.
>>> You can read the data in to GrADS and process it as you like. You could
>>> also read the gridded data in Matlab using "fread" and extract or process
>>> the data at the point of interest.
>>>
>>> regards - Nick
>>>
>>> Marwan Kheimi wrote:
>>>> Dear Bob,
>>>>
>>>> Could you be more a specific about what type of program I should be
>>>> using because I am new to this. I am trying to simple calculation such as
>>>> Regression analysis, Correlation, RMS
>>>> Also, I am trying to compute the annual, monthly, 10-daily, daily for
>>>> a specific coordinate and plot.
>>>>
>>>> I was working on matlab because I am familiar with it but now with
>>>> CMORPH files I am not sure what use. I am kinda of beginner user.
>>>> However, I am a fast learner if you could guide through the process or
>>>> at least referring to me some website that would be great.
>>>>
>>>> Best regards,
>>>> Marwan
>>>>
>>>>
>>>>
>>>> On Jan 31, 2013, at 6:36 AM, "Bob Kuligowski - NOAA Federal"
>>>> <bob.kuligowski at noaa.gov  mailto:bob.kuligowski at noaa.gov> wrote:
>>>>
>>>>> Dear Marwan,
>>>>>
>>>>>      The only way I know to plot CMORPH data is to use the control files
>>>>> and README guidance inftp://ftp.cpc.ncep.noaa.gov/precip/global_CMORPH/.
>>>>>
>>>>> Cheers,
>>>>> Bob
>>>>>
>>>>>> Hi gradusers,
>>>>>>
>>>>>> I have been trying to open and plot these data but before that is
>>>>>> there is anyway to change there extension from binary to familiar
>>>>>> extenstion as in HDF NetCDF or Asccii file.
>>>>>>
>>>>>> Also, is there is away to install grad into windows os or is it
>>>>>> better to use ubuntu linxus distribution or any other referrals. I
>>>>>> am new on this but I wish someone could have some experience with
>>>>>> that to help/ share.
>>>>>>
>>>>>> Thank you all for your help in advance.
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> gradsusr mailing list
>>>>>> gradsusr at gradsusr.org  mailto:gradsusr at gradsusr.org
>>>>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>>>

-- 
Bob Kuligowski, Ph.D.
Meteorologist
NOAA/NESDIS/Center for Satellite Applications and Research (STAR)

Mailing Address:
National Oceanic and Atmospheric Administration
NESDIS STAR/SMCD
Bob Kuligowski
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5830 University Research Court
2nd Floor, Office #2828
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Phone:  (301) 683-3593
Fax  :  (301) 683-3616

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