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Re: 20000405: ETA 60 hour grids

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  • Subject: Re: 20000405: ETA 60 hour grids
  • Date: Wed, 5 Apr 2000 15:05:39 -0400 (EDT)
On Wed, 5 Apr 2000, Steve Chiswell wrote:

> No...they are there through 60 hours. Since you don't mention
> if this is based on what you are receiving, or a decoded output file
> then I would suggest checking for high latencies if you don't see the extended
> times in the incoming data stream.

I'm sorry, decoded output from dcgrib using garp and gdinfo.
 
> If you are not decoding the full set of data, then I'd suggest checking 
> the decoder parameters.
> 
> If the gempak file is full, then you need to increase the maximum number
> of grids in the output file using the -m option. If you do not specify -m
> then the default number of grids in a GEMPAK file is 1500. Using something
> like -m 7500 would allow 7500 grids in the file.

Now it's all coming back to me.  I learned about the default last year
after the changeover to NOAAPORT.  We experimented getting ETA on the 212
& 215 grids as well as the mesoETA.  The files we got were truncated and
I eventually figured out that the max # of grid was 1500.  So after poking
around I located the #define DEFAULT_GRIDS in 'dcgrib.c' and changed it
from 1500 to 2000.  But that's apparently not enough for the mesoeta now
and obviously using the '-m' parameter (which I didn't know about) is a
much better solution.  I will try both the eta and mesoeta with 7500.

Tom
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Tom McDermott                           Email: address@hidden
System Administrator                    Phone: (716) 395-5718
Earth Sciences Dept.                    Fax: (716) 395-2416
SUNY College at Brockport