[gradsusr] Query re working with lats4d...

[Michael Fiorino]

two points:

1) opengrads.org best supports lats and lats4d, in both 1.X and 2.0.  I
have recently updated the opengrads distros with new lats features and
bug fixes.  if you want to use lats4d (and lats), it's best to use our
opengrads versions as Arlindo and I support lats...

2) lats allows use of a user-specified table 'set parmtab PATH' where
PATH is the path to a table, e.g., for my work I use that attached
parmtable, documentation on controlling the grib1 parameters is in the
file...

ciao Mike

On 6/23/10 9:07 PM, Filipkowski, John D wrote:
> Hmmn, is there a way of telling lats4d which grib table to use?
>
> -----Original Message-----
> From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org] On Behalf Of Wesley Ebisuzaki
> Sent: Wednesday, June 23, 2010 4:27 PM
> To: GrADS Users Forum
> Subject: Re: [gradsusr] Query re working with lats4d...
>
> John,
>
>    I am not a user of lat4d but my understanding is that lats4d creates a custom grib table for every file.  wgrib doesn't know about the grib table, so it uses the operational NCEP table.
>
>      Wesley Ebisuzaki
>
>
> Filipkowski, John D wrote:
>   
>> Hi GrADS users!
>>
>>  - I'm looking for a link  or  reference do the following:
>>
>> For a GRIB-1 file, for a selected variable, I want to:
>>   Smooth the data, output smoothed field to GRIB-1 format   ..
>>
>> Test data:
>> Input files:       *TSTM.ctl*
>> *                      TSTM.grib                      - GRIB-1 data
>> file *
>> *                      TSTM.grib.idx*
>>
>>
>> *wgrib  TSTM.grib*
>> 1:0:d=10060912:TSTM:kpds5=60:kpds6=1:kpds7=0:TR=4:P1=0:P2=0:TimeU=1:sf
>> c:0-0hr
>> acc:NAve=0
>>
>> *Contents ot TSTM.ctl*
>> dset  ^TSTM.grib
>> index ^TSTM.grib.idx
>> undef 9.999E+20
>> title  TSTM.grib
>> * produced by grib2ctl v0.9.12.5p32
>> dtype grib 212
>> pdef 185 129 lcc 35.0 -95.0 105 49 25 25 -95 40635 40635 xdef 181
>> linear -140. 0.5 ydef  91 linear  15  0.5 tdef 1 linear 12Z09jun2010
>> 1mo zdef 1 linear 1 1 vars 1
>> TSTMsfc  60,1, 0      ** surface Thunderstorm probability [%]
>> ENDVARS
>>
>> I've used the "lats4d" utility of gradsc/gradsnc as follows:
>>     
>>> *gradsnc  -blc 'lats4d -v -q -i TSTM.ctl  -ftype ctl -func
>>> smth9(tstmsfc) -o test  -format grads_grib'*
>>>
>>>
>>> *Output:  (excerpted)...*
>>> lats4d: vertical levels 1
>>> lats4d: using PRESSURE for vertical coordinate ...
>>> lats4d: Function expression smth9(tstmsfc)
>>> lats4d: surface  variables  tstmsfc
>>> lats4d: writing to grads_grib file test.grb on 12Z09JUN2010  ...
>>>
>>> *wgrib  test.grb*
>>> Undefined parameter table (center 100-2 table 128), using NCEP-opn
>>> 1:0:d=10060912:*PRES*:kpds5=1:kpgs6=1:kpds7=0:TR=0:P1=0:P2=0:TimeU=1:
>>> sfc:anl:Nave=0
>>>
>>>
>>> I don't understand why the data written to the new GRIB file is now
>>> called "PRES"...
>>>
>>> Can anyone shed some light on this?
>>>
>>> Cheers,
>>>
>>>
>>>
>>>       
>>
>>
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