Re: Hmmmm. Can rad handle the new 88d stuff yet? (decoder?)

Folks,

Don't forget that you need to account for the WMO header
at the front of the data... it's not compressed, so it'll
need to be stripped out first.

     Bob Lipschutz
     FSL


> 
> In a previous message to me, you wrote: 
> 
>  >
>  >Pete...
>  >
>  >You are trying to make things too complicated.  Most data compression progr
ams
>  >have some easy of way of sending uncompressed data to stdout.  The ones tha
t
>  >I know about are:
>  >
>  >    Scheme          Command to use
>  >    pack            pcat
>  >    compress        zcat
>  >    gzip (ZLIB)     gzcat or zcat (depending on how it was built)
>  >    bzip2           bzcat
>  >
>  >The only one that I can't find a way, (at least via the man pages that I ha
ve)
>  >is "zip".
>  >
>  >As a sample:
>  >
>  >    cat file.gz | gzcat
>  >
>  >would get you the ungzipped version of "file".
> 
> Hi Kevin,
> 
> That's not exactly the problem here. The NEXRAD files are not
> zip'd files, they just happen to use one of the same compression
> algorithms that zip does.  They are not in 'zip' format, so
> the stdio version (funzip on unix) doesn't recognize them.
> 
>  >
>  >By the way, if you really want to program via ZLIB, just use "gzopen" and
>  >"gzread".  It is easy to do using these calls.
> 
> That would work if the files were in gzip format, but they aren't,
zlib used to use gzip format but apparently it now uses the
> deflate/inflate algorithms, so I don't think gzopen and
> gzread will do it...
> 
> There are other routines in the zlib library to inflate
> deflated data, it's just a matter of writing the program
> to call them.
> 
> Am I way off base here?
> 
> Pete
> 
> 
>  >
>  >    Kevin W. Thomas
>  >    Sun System Administrator & Meteorologist
>  >    National Severe Storms Laboratory
>  >    Norman, Oklahoma
>  >
>  >    Email:  address@hidden
> 
> 
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