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20000802: ingest and decode of Unidata-Wisconsin PNG-compressed images

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  • Subject: 20000802: ingest and decode of Unidata-Wisconsin PNG-compressed images
  • Date: Wed, 02 Aug 2000 14:28:30 -0600
>From: "D. J. Raymond" <address@hidden>
>Organization: NMT
>Keywords: 200008021927.e72JReT03751 ldm-mcidas pqact.conf ldmd.conf pnga2area

Dave,

>I have set up to receive png mcidas images, but don't seem to be getting
>any.  I modified my pqact.conf file for western visible images as
>indicated by unidata:
>
>
>### SATELLITE DATA #####################################################
>#
># AREA files:
>#
># GOES West Visible
>#MCIDAS ^LWTOA3 12.
>#       PIPE    -close /usr/local/bin/mc2area -p /home.heron/ldm/mcidas %y%m%d
> %H_svw.mca
># PNG GOES West Visible
>MCIDAS  ^pnga2area Q1 U9 .*
>        PIPE    -close
>        pnga2area -a /usr/local/ldm/etc/SATANNOT -b /usr/local/ldm/etc/SATBAND
>        /home.heron/ldm/png/%%y%%m%%d%%H_svw.mca
>#

This entry looks fine (assuming that there are tabs in all the right places).

>I wonder if my ldmd.conf file is set up correctly:
>
># NM Tech requests
>request WMO|HRS "(^[A-OQ-X])|(^[YZ].[^AHIJRU])" yin.engin.umich.edu
>request MCIDAS  "(^[A-OQ-X])|(^[YZ].[^AHIJRU])" 141.213.23.50

Here is your problem. The request for MCIDAS specifies things that begin
with capital letters, and the headers for the PNG images start with
'pnga2area'.

I suggest you change your MCIDAS request line to:

request MCIDAS  "^pnga2area Q[01]" 141.213.23.50

If you are fully prepared to accept new additions to the Unidata-Wisconsin
feed, then you might change this to be:

request MCIDAS  "^pnga2area Q." 141.213.23.50

Of course, a change to ldmd.conf will require a stop and restart of your
LDM.

>Regards,

Please let me know if this does not fix your problem.

Tom

>From address@hidden Wed Aug  2 16:07:14 2000
>Subject: Re: 20000802: ingest and decode of Unidata-Wisconsin PNG-compressed 
>images

OK, that fixes my problem -- now I can get down to decoding the
new format.

Thanks,

Dave