[gradsusr] How to read CMORPH data

Wed Feb 6 18:22:43 EST 2013

Dear Bob,

Could you provide me with FTP link to download the CMORPH daily data . I was looking through this ftp link but I think there has been changes to it. I was able access to all the historical database and I know that CMORPH data began on 2002 up to now.   

ftp://ftp.cpc.ncep.noaa.gov/precip/global_CMORPH/

For the CMORPH+MWCOMB_025deg-3hr.ctl if go into this ctl file and try to open it, it would not allow you to access the data I am not sure why.

and thanks I was able to open the daily CMORPH file. However, I want to try to open all flies using one ctl file is that possible 

Best regards,

Marwan 

From: Bob Kuligowski - NOAA Federal 
Sent: Wednesday, February 06, 2013 7:00 AM
To: gradsusr at gradsusr.org 
Subject: Re: [gradsusr] How to read CMORPH data

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 
  Sent: Monday, February 04, 2013 6:03 AM
  To: 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 
    Sent: Friday, February 01, 2013 6:04 AM
    To: 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 Graham mailto: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 in ftp://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

--------------------------------------------------------------------------------
_______________________________________________
gradsusr mailing list
gradsusr at gradsusr.org
http://gradsusr.org/mailman/listinfo/gradsusr
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20130206/efeaf0ed/attachment-0003.html 