[gradsusr] How to read CMORPH data
Bob Kuligowski - NOAA Federal
bob.kuligowski at noaa.gov
Mon Feb 4 09:03:56 EST 2013
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
>>>> NCWCP E/RA2
>>>> 5830 University Research Court
>>>> 2nd Floor, Office #2828
>>>> College Park, MD 20740-3818
>>>>
>>>> Phone: (301) 683-3593
>>>> Fax : (301) 683-3616
>>>>
>>>> http://www.star.nesdis.noaa.gov/star/Kuligowski_B.php
>>>> http://www.star.nesdis.noaa.gov/smcd/emb/ff/index.php
>>>>
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>
>
> --
> 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
> NCWCP E/RA2
> 5830 University Research Court
> 2nd Floor, Office #2828
> College Park, MD 20740-3818
>
> Phone: (301) 683-3593
> Fax : (301) 683-3616
>
> http://www.star.nesdis.noaa.gov/star/Kuligowski_B.php
> http://www.star.nesdis.noaa.gov/smcd/emb/ff/index.php
>
> ------------------------------------------------------------------------
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>
>
> _______________________________________________
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> 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
NCWCP E/RA2
5830 University Research Court
2nd Floor, Office #2828
College Park, MD 20740-3818
Phone: (301) 683-3593
Fax : (301) 683-3616
http://www.star.nesdis.noaa.gov/star/Kuligowski_B.php
http://www.star.nesdis.noaa.gov/smcd/emb/ff/index.php
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DSET advt-8km-interp-prim-sat-spat-2lag-2.5+5dovlp8kmIR-2013013022
OPTIONS yrev little_endian
UNDEF 255
TITLE correlation estimates
XDEF 4948 LINEAR 0.036378335 0.072756669
YDEF 1649 LINEAR -59.963614 0.072771377
ZDEF 01 LEVELS 1
TDEF 99999 LINEAR 00z21dec2002 30mn
VARS 3
cmorph 1 -1,40,1,-1 xxxxxx yyyyy (mult. by 0.2 to get mm/hr units)
time 1 -1,40,1,-1 xxxxxx yyyyy
satid 1 -1,40,1,-1 xxxxxx yyyyy
ENDVARS
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