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20030521: NIMAGE feed?

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  • Subject: 20030521: NIMAGE feed?
  • Date: Wed, 21 May 2003 09:17:15 -0600
>From: address@hidden (Pete Pokrandt)
>Organization: University of Wisconsin
>Keywords: 200305211451.h4LEpALd008688 IDD NIMAGE

Hi Pete,

>I was looking at the ldm6 stats pages, and figured out from that
>and from doing a 'notifyme' on the NIMAGE feed from thelma that 
>images for GOES-10 and GOES-12 are showing up on the NIMAGE feed 
>(still experimental? I never saw any announcement about this?) 

The NIMAGE feed is the remapped GOES images in GINI format in
NOAAPORT.  There has never been a general announcement about their
availability since most sites do not have the bandwidth necessary to
ingest or store them.  The VIS sectors, for instance, are each
26 MB in size after they get uncompressed, and there are 4 of
these sectors for both GOES-East ande GOES-West each hour.

>Could we begin feeding (and relaying if desired) this feed from
>thelma or somewhere? I spoke with Jerry R down at SSEC and he
>said that they receive the satellite channels on their NOAAPORT
>receiver but are not ingesting them at all.

Yes.  I just added an allow for any machine from aos.wisc.edu for
NIMAGE from papagayo.unl.edu.  If you want to uncompress these images
from the PNG format that we compress then into, you will need to setup
ldm-mcidas pngg2gini actions in your ~ldm/etc/pqact.conf file.  The
reason I say _if_ is because GEMPAK can handle the images in their PNG
compressed format.

Please note that the NIMAGE images will undergo a format change in the
coming few months.  The NWS will be changing how these images get
broadcast, and this will affect how we relay the images in the IDD.
Chiz has already modified GEMPAK (an unreleased version) to be able to
read the zlib compressed images as they will come off NOAAPORT.  I will
be adding a new routine to the ldm-mcidas package (or modifying
pngg2gini) to uncompress these images before the NWS changes become
operational.

Tom