[ncl-talk] How to correctly read in the merged CMORPH data usig NCL

[Barry Lynn]

Hi Wen:

What are nx,ny?  Are they suppose to be the same values in the data read in
and the data plotted?

Are you sure about the little_endian definition?

On Wed, May 3, 2017 at 6:16 AM, wen <wenguanhuan at 163.com> wrote:

> Hi. The following script is able to read the data. I hope it work for you.
>
>
>  setfileoption("bin","ReadByteOrder","littleEndian")
>  mfile = "1.grd"
>   rec = 0
>   crain = fbindirread(mfile,rec,(/ny,nx/),"float")
>   rec = 1
>   gsamp = fbindirread(mfile,rec,(/ny,nx/),"float")
>
>
>
> --
> Best regards，
> Guanhuan Wen
>
> 在 2017-04-30 12:07:44，"易路" <dg1225033 at smail.nju.edu.cn> 写道：
>
> Hi all,
> I downloaed the merged CMORPH data from China Meteorological
> Administration to get the hourly precipitation imformation, the suffix of
> the data file is grd which is a standard format of the tool GrADS.
> According to the associated ctl file of the grd file,  I tried to write the
> NCL script to read it but can't get the right data, and I couldn't find out
> the prolbems...
>
> So would you please help me to find out the problems ? Thanks very mcuh
> for your precious time and kindness!
>
> Sincerely
> Yi Lu
>
> ;;;;;;;;;;; the part of NCL script to read in the precipitation ;;;;;;;;;;
> tim = "1.grd"
> setfileoption("bin","ReadByteOrder","LittleEndian")
> rain = fbindirread(tim,0,(/nlat,nlon/),"double")
>
> nlat = 440
> nlon = 700
> r=new((/nlat,nlon/),"double")
> k=0
> do i  = 0, nlat-1
>   do j = 0, nlon-1
>    r(i,j) = rain(nlat-1-i,j)
>         k = k+1
>   end do
> end do
>
> lon = fspan(70.05,139.95,nlon)
> lon!0 = "lon"
> lon at units = "degrees_east"
> lon at long_name = "longitude"
>
> lat = fspan(15.05,58.95,nlat)
> lat!0 = "lat"
> lat at long_name = "latitude"
> lat at units = "degrees_north"
>
> r!0 = "lat"
> r!1 = "lon"
> r&lat = lat
> r&lon = lon
> r at units = "mm/hour"
> r at long_name = "merged CMORPH data "
> r at _FillValue = -999.00
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
>
>
>
>
>
>
> 易路
>
> 南大邮件系统/学生/博士生/12级博士生
>
> 南京市汉口路22号
>
>
>
>
>
>
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-- 
Barry H. Lynn, Ph.D
Senior Lecturer,
The Institute of the Earth Science,
The Hebrew University of Jerusalem,
Givat Ram, Jerusalem 91904, Israel
Tel: 972 547 231 170
Fax: (972)-25662581

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