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20051014: 20051011: NETCDF to GRID file

Mike,

I glanced at the CDC web site. The SHUM set I found was on pressure levels,
and running dcreanal on that data for the 1948 file:
% dcreanal shum.1948.nc YYYYMM_shum.gem
The same could be repeated for each yearly netcdf file.

produced monthly files with pressure levels of 1000, 925, 850, 700, 600, 500,
400, 300. At each time, there were 8 levels.

 GDFILE   = 194801_shum.gem
 LSTALL   = yes
 OUTPUT   = t
 GDATTIM  = all
 GLEVEL   = all
 GVCORD   = all
 GFUNC    = all
 GEMPAK-GDINFO>r

 GRID FILE: 194801_shum.gem                                                     
                                

 GRID NAVIGATION: 
     PROJECTION:          CED                 
     GRID SIZE:          144  73
     LL CORNER:             -90.00      0.00
     UR CORNER:              90.00    357.50

 GRID ANALYSIS BLOCK: 
      UNKNOWN ANALYSIS TYPE 

 Number of grids in file:   992

 Maximum number of grids in file:   9800

  NUM       TIME1              TIME2           LEVL1 LEVL2  VCORD PARM
    1     480101/0000                           1000         PRES SPFH        
    2     480101/0000                            925         PRES SPFH        
    3     480101/0000                            850         PRES SPFH        
    4     480101/0000                            700         PRES SPFH        
    5     480101/0000                            600         PRES SPFH        
    6     480101/0000                            500         PRES SPFH        
    7     480101/0000                            400         PRES SPFH        
    8     480101/0000                            300         PRES SPFH        
    9     480101/0600                           1000         PRES SPFH        
   10     480101/0600                            925         PRES SPFH        
   11     480101/0600                            850         PRES SPFH        
   12     480101/0600                            700         PRES SPFH        
   13     480101/0600                            600         PRES SPFH        
   14     480101/0600                            500         PRES SPFH        
   15     480101/0600                            400         PRES SPFH        
   16     480101/0600                            300         PRES SPFH
<...>
etc.

If this isn't the type of output your seeing, then I'd have to see your gdinfo
output.

Steve Chiswell
Unidata User Support



>From: Mike Bodner <address@hidden>
>Organization: NOAA/NCEP/HPC
>Keywords: 200510141725.j9EHPi7s003290

>Hi Steve,
>
>I downloaded the executable file and table, then ran the program over 
>1948-2004 for specific humidity. The grid (GEMPAK) file created gave 4 
>times stamps of 0000 UTC for each day of the year.
>
>If you have any insight into what may be happening, that would be great.
>
>Mike
>
>Unidata Support wrote:
>
>>Mike, 
>>
>>I'd need to know about your OS, or you can download the binary 
>>distribution of GEMPAK from:
>>http://www.unidata.ucar.edu/downloads/gempak/
>>
>>
>>Steve CHiswell
>>Unidata User SUpport
>>
>>  
>>
>>>From: Mike Bodner <address@hidden>
>>>Organization: NOAA/NCEP/HPC
>>>Keywords: 200510112034.j9BKYZeX025925
>>>    
>>>
>>
>>  
>>
>>>Steve,
>>>
>>>I will need the dcreanal executable and the table. If you could email 
>>>them to me or put them on a server where I can grab them, that would be 
>>>great.
>>>
>>>Mike
>>>
>>>Steve Chiswell wrote:
>>>
>>>    
>>>
>>>>Mike,
>>>>
>>>>The dcreanal program is contained in the GEMPAK distribution which you
>>>>can obtain through the Unidata web portal:
>>>>www.unidata.ucar.edu/software/gempak
>>>>
>>>>The dcreanal program uses the $GEMTBL/grid/ncarncep1.tbl grid parameter
>>>>table. If you need just the dcreanal executable, I can provide the
>>>>binary and the table.
>>>>
>>>>Running the program works like:
>>>>dcreanal input.nc gempak_outfile_template
>>>>
>>>>for example, to create monthly files: 
>>>>dcreanal shum.2004.nc YYYYMM.gem
>>>>
>>>>If the file you have has 4 times per day, a monthly file would have
>>>>~120 grid times. The usual limit for number of grid times in a GEMPAK
>>>>file is 1000, so you would not be able to place all times
>>>>in a single yearly gempak file, so use the monthly template.
>>>>
>>>>Steve Chiswell
>>>>Unidata User Support
>>>>
>>>>On Tue, 2005-10-11 at 13:27, Mike Bodner wrote:
>>>> 
>>>>
>>>>      
>>>>
>>>>>Steve,
>>>>>
>>>>>I am looking to convert NCAR/NCEP reanalysis files which I downloaded 
>>>>>        
>>>>>
>>>>>from the CDC site.
>>>>      
>>>>
>>>>>a sample of the file name is  /shum.2004.nc /and it's a 2.5x2.5 grid.
>>>>>
>>>>>Hope this helps
>>>>>
>>>>>Mike
>>>>>
>>>>>Steve Chiswell wrote:
>>>>>
>>>>>   
>>>>>
>>>>>        
>>>>>
>>>>>>Mike,
>>>>>>
>>>>>>It depends on the source and format of the netcdf file.
>>>>>>I provide a NetCDF to GEMPAK grid for NCAR/NCEP reanalysis
>>>>>>types of grid files that follow the COARDS conventions for NetCDF
>>>>>>files. Otherwise, i'd have to know the source of the file and
>>>>>>see the NetCDF header.
>>>>>>
>>>>>>Steve Chiswell
>>>>>>Unidata User Support
>>>>>>
>>>>>>
>>>>>>On Tue, 2005-10-11 at 12:33, Mike Bodner wrote:
>>>>>>
>>>>>>
>>>>>>     
>>>>>>
>>>>>>          
>>>>>>
>>>>>>>Hi Steve,
>>>>>>>
>>>>>>>Scott Jacops from NCEP suggested that I contact you with my question.
>>>>>>>
>>>>>>>Do you know which programs are available to convert a NETCDF file to a 
>>>>>>>gird file in GEMPAK? If so, do you know where I need obtain this program
> ?
>>>>>>>
>>>>>>>Thanks in advance for any help you can provide.
>>>>>>>
>>>>>>>Mike
>>>>>>>  
>>>>>>>
>>>>>>>       
>>>>>>>
>>>>>>>            
>>>>>>>
>>>-- 
>>>
>>>Mike Bodner
>>>Meteorologist/Developer
>>>NOAA/NCEP/HPC/Development and Training Branch
>>>5200 Auth Road
>>>Camp Springs, MD 20746
>>>
>>>Email     address@hidden
>>>Voice     301-763-8000 ext. 7322
>>>Fax       301-763-8085
>>>
>>>    
>>>
>>--
>>**************************************************************************** 
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>
>-- 
>
>Mike Bodner
>Meteorologist/Developer
>NOAA/NCEP/HPC/Development and Training Branch
>5200 Auth Road
>Camp Springs, MD 20746
>
>Email     address@hidden
>Voice     301-763-8000 ext. 7322
>Fax       301-763-8085
>
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