Re: empty header in reading grib2

Hi, David Brown,

  Thanks for the check.
  I don't know the reason either. We used the standard "yum install ncl"
to install the package, and everything appears to be at the right place.
  I'll keep looking and maybe 5.1.0 could help to resolve the issue.

- Yuguang

David Brown wrote:
> Hi YuGuang He,
>
> I got your sample file, and NCL seems to read it pretty well, except
> that there is one code table entry that it does not recognize.
>
> ncl 0> f = addfile("gfs.t00z.pgrbf240.grib2","r")
> warning: Entry (203) not found in code table file
> /usr/local/ncarg/lib/ncarg/grib2_codetables/ncep/4/4.2.2.3.table
> ncl 1> print(f)
> Variable: f (file variable)
>
> filename: gfs.t00z.pgrbf240
> path: gfs.t00z.pgrbf240.grib2
> file global attributes:
> dimensions:
> lat_0 = 73
> lon_0 = 144
> lv_ISBL0 = 26
> lv_AMSL1 = 3
> lv_DBLL2 = 4
> lv_PVL3 = 2
> lv_ISBL4 = 21
> lv_SIGL5 = 4
> lv_ISBL6 = 2
> lv_ISBL7 = 6
> variables:
> float TMP_P0_L1_GLL0 ( lat_0, lon_0 )
> center : US National Weather Service - NCEP (WMC)
> production_status : Operational products
> long_name : Temperature
> units : K
> _FillValue : 1e+20
> grid_type : Latitude/longitude
> parameter_discipline_and_category : Meteorological
> products, Temperature
> parameter_template_discipline_category_number : ( 0,
> 0, 0, 0 )
> level_type : Ground or water surface
> level : 0
> forecast_time : 240
> forecast_time_units : hours
> initial_time : 02/20/2009 (00:00)
> ... etc.
>
>
>
> Are you saying that when you read it, there do not seem to be any
> variables or dimensions?
> That is quite strange.
> My best suggestion would be to wait for 5.1.0, which is in final test
> phase right now and will be released next week.
> However, I truly do not know why you would have this sort of problem
> with 5.0.0.
> -dave
>
> On Feb 24, 2009, at 12:03 PM, YuGuang He wrote:
>
>> Dear NCL Supports,
>>
>> I am having an issue of reading the grib2 format files from NCEP in
>> the updated NCL version 5.0.0 on Fedora 9 LINUX. I was wondering if I
>> could get some help and shed some light on it.
>> Basically, when I opened a file by
>>
>> fh = addfile("gfs.t00z.pgrbf240.grib2","r")
>> print(fh)
>>
>> it shows,
>>
>> Variable: fh (file variable)
>>
>> filename: gfs.t00z.pgrbf240
>> path: gfs.t00z.pgrbf240.grib2
>> file global attributes:
>> dimensions:
>> variables:
>>
>> which does not contain the header information I was looking for. I
>> have been using version 4.3.0 all along for the past few years and
>> there has not been such an issue for me. Also, there is no problem
>> for me to read grib1 and netCDF files with this updated version 5.0.0
>> of NCL.
>>
>> Thank you very much for your help.
>>
>> - Yuguang He
>>
>> --
>> contact : Yuguang He
>> company : AER, Inc.
>> email : yhe_at_aer.com
>> subject : Technical Support
>> phone : 781-761-2288 (ext. 217)
>> facsimile : 781-761-2299
>> address : 131 Hartwell Ave
>> city : Lexington
>> state : MA
>> postalcode : 02421
>> country : USA
>> website : http://www.aer.com
>> referrer : http://weather.aer.com/contact.php
>>
>> <yhe.vcf>_______________________________________________
>> ncl-talk mailing list
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>

-- 
       contact : Yuguang He
       company : AER, Inc.
         email : yhe_at_aer.com
       subject : Technical Support
         phone : 781-761-2288 (ext. 217)
     facsimile : 781-761-2299
       address : 131 Hartwell Ave
          city : Lexington
         state : MA
    postalcode : 02421
       country : USA
       website : http://www.aer.com
      referrer : http://weather.aer.com/contact.php

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