Re: 19990127: grib to netcdf

On Thu, 11 Feb 1999, Melissa Richey wrote:

> 
> Hi Robb-
> 
> I have modified gribtonc to sort of degrib the variable water vapor
> mixing ratio. I modified params.c and params.h by sticking in the
> code 185 and associating it with the variable wvmixr.
Missy,

That's what I started to do before I found out about the conflict of 185. 
The only suggestion I have is to use the brute force method, that is get a
raw grib file including param 185 and use a debugger on gribtonc. My
feeling gribtonc is trying to process 185 according to the NWS manner
instead of the FSL manner.  I'm not the originator of gribtonc and I have
not added/changed params before, so I would have to research this. I'll
look at the code today to see if there is something else. Also, as a guide
line I would look at how the other hybrid ruc2 variables are processed.
Have you changed the cdl wvmixr variable to match your modified gribtonc?

Just some thoughts,
Robb...

> As before, it degribs correctly starting at the 29th level, but prior
> to that, gives "oversize grib product". Also, gribdump will no longer
> produce any output, whereas before the modification, it did.
> Any suggestions?
> 
> Thanks for all your help-
> Missy
> 
> 
> 
> + 
> + Missy,
> + 
> + I also beleive the convention for new models (ruc2) params is to use
> + numbers that are currently unused. The other models followed that
> + convention. It sure would of made the gribtonc changes much easier.
> + I wonder if NWS will assign water vapor mixing ratio another number
> + because they will probably want to use that parameter also?
> + 
> + Robb... 
> + 
> + 
> + 
> + On Mon, 8 Feb 1999, Melissa Richey wrote:
> + 
> + > Hi Robb-
> + > Thanks-
> + > 
> + > The official (?) Ruc-2 grib table can be found at
> + > 
> + > http://maps.fsl.noaa.gov/ruc2gribtable.html .
> + > 
> + > It states that NCEP needs to permanently assign that number, but
> + > we have been able to access water vapor mixing ratio, using
> + > the code number 185, in another program which degribs into
> + > a format different from netcdf.
> + > 
> + > Missy
> + > 
> + > + 
> + > + Just wanted to let you know that I'm looking at the problem. It's 
> appears
> + > + to be a  gribtonc coding problem, but I'm looking at ruc2.cdl
> + > + modification solution.
> + > + 
> + > + 
> + > + On Fri, 5 Feb 1999, Melissa Richey wrote:
> + > + 
> + > + > Hi Robb- 
> + > + > Thanks for your help with the gribtonc command line. 
> + > + > I was able to figure out what was wrong from the output and I
> + > + > have been getting pretty good results. I have however, another 
> question 
> + > + > (or two) for
> + > + > you. We would like to degrib the variable "water vapor mixing ratio".
> + > + > In the ruc2.cdl file there is only a variable for "cloud water
> + > + > mixing ratio". In the official grib table, the grib code associated to
> + > + > "water vapor mixing ratio" is 185,
> + > + 
> + > + Where's the official grib table?  Wonder why it would be different then
> + > + the 388 Grib manual?
> + > + 
> + > + Robb...
> + > + 
> + > +  but in the grib document you 
> + > + > refer to in another one of your emails, it shows that associated
> + > + > to code 185 is "Turbulence SIGMET/AIRMET", which is the reserved_hybr
> + > + > variable in the ruc2.cdl file. All the other variables that I need
> + > + > degrib successfully, but when the decoder gets to the reserved_hybr 
> + > + > variable, in the log file it prints out 28 levels of
> + > + > 
> + > + > Feb 04 22:30:52 gribtonc[988]: oversize GRIB product
> + > + > 
> + > + > and then at the 29th level, it prints out the typical decoding
> + > + > output
> + > + > 
> + > + > Feb 04 22:30:52 gribtonc[988]: 149: wrote reserved_hybr(0,28,*,*) to 
> ruc2.nc
> + > + > 
> + > + > for the rest of the 40 levels.
> + > + > 
> + > + > Why is this happening, and is there a variable for "water vapor mixing
> + > + > ratio"? I looked in param.c, but couldn't find anything like that.
> + > + > I am using a hybrid-coodinate ruc2 grib file.
> + > + > 
> + > + > Thanks!!!
> + > + > 
> + > + > Missy
> + > + > 
> + > + > 
> + > + 
> ===============================================================================
> + > + Robb Kambic                                Unidata Program Center
> + > + Software Engineer III                      Univ. Corp for Atmospheric 
> Research
> + > + address@hidden             WWW: http://www.unidata.ucar.edu/
> + > + 
> ===============================================================================
> + > + 
> + > + 
> + > 
> + 
> + 
> ===============================================================================
> + Robb Kambic                            Unidata Program Center
> + Software Engineer III                          Univ. Corp for Atmospheric 
> Research
> + address@hidden                 WWW: http://www.unidata.ucar.edu/
> + 
> ===============================================================================
> + 
> + 
> 

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