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Re: gribtonc: cdl for CMC data

On Mon, 10 Jun 2002, Rorik Peterson wrote:

>       I couldn't find a cdl for the Canadian Meterological Service data,
> so I wrote my own.  However, some data products in the CMC stream are at
> ETA levels.  When I added a new dimension to my cdl file for the eta
> level, gribtonc simply "ate" that product (using verbose mode, that
> product disappeared without being written or signaling an error).  After
> going through gribtonc with a debugger, I found that many of the levels
> defined in levels.h are not included in the 'switch' statement in nc.c's
> getlev() function.  

Rorik,

I haven't encounter that problem before using gribtonc, doesn't mean that
it not a problem.  It could be a cdl file problem or it could be a bug in
gribtonc. If you could provide me with the cdl file and some raw data or a
pointer to a data location I'll look into it.  At this time, I'll take a
look at your findings too.

Robb...



This causes nc_write() to return -1 to gribtonc before
> writing the data (so num_gribs_written doesn't get incremented, yet no
> error is produced; the product simply vanishes.) If I add a LEVEL_ETAL
> case to getlev(), it appears to work fine.  However, I suspect it can't be
> that simple, and I'm missing something else.
>       What is the reason that all the levels defined in levels.h are not
> included in nc.c (and thus cannot be processed with gribtonc)?  And what
> else do I need to modify to "properly" write ETA-level dat to a netCDF
> file.
>       Thanks.
> 
> -----------------------------
> Rorik Peterson
> Research Engineer
> Remote Sensing Group
> Geophysical Institute
> University Alaska, Fairbanks
> Fairbanks, AK 99775
> PH:  907-474-1519
> FAX: 907-474-7290
> -----------------------------
> 
> 
> 

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================