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20050823: acars gempak decoding

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  • Subject: 20050823: acars gempak decoding
  • Date: Mon, 29 Aug 2005 10:13:44 -0600
Brian,

You are using a very old version of the decoder. The NetCDF format of the
ACARS data has changed many times since the 5.6.F version you are using.

The current version of dcacars distributed with GEMPAK 5.8.3a is compatible 
with the NetCDF CDL being used by FSL at this time.

Steve Chiswell
Unidata User Support



>From: Brian Colle <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200508240129.j7O1T0jo019728

>
>Hi,
>
>I am trying to use decode the incoming madis acars data for gempak. From
>previous support emails, I am using:
>
>#PCWS   ^FSL\.CompressedNetCDF\.MADIS\.acars\.
>       PIPE    -close  /thunder1/ldm/NAWIPS-5.6.F/bin/scripts/dcgunzip
>       /thunder1/ldm/NAWIPS-5.6.F/bin/sol/dcacars
>       -e GEMTBL=/thunder1/ldm/NAWIPS-5.6.F/gempak/tables
>       -l /thunder1/ldm/logs/dcacars.log
>       data/gempak/acars/YYYYMMDDHH_acars.gem
>
>But this yields:
>Aug 20 00:02:44 dcacars[12892]: could not get variable information
>Aug 20 00:02:44 dcacars[12892]: could not decode data 0
>
>I was able to duplicate the problem by saving to a file:
>PCWS    ^FSL\.CompressedNetCDF\.MADIS\.acars\.
>        FILE    /thunder1/ldm/data/gempak/acars/TEST.gz
>
>and then gunzipping and running dcacars by hand:
>
>/thunder1/ldm/NAWIPS-5.6.F/bin/sol/dcacars -f
>/thunder1/ldm/data/gempak/acars/TEST -e
>GEMTBL=/thunder1/ldm/NAWIPS-5.6.F/gempak/tables -x -l LOG TESTME
>
>ldm>more LOG
>        putenv GEMTBL=/thunder1/ldm/NAWIPS-5.6.F/gempak/tables
>        will get input from /thunder1/ldm/data/gempak/acars/TEST
>        decode_acars /thunder1/ldm/data/gempak/acars/TESTIT miss -9999 ier
>0 cdfid 4
>        decoding ncacars
>        version name len is 3
>        version type is NC_CHAR 1.7 VAL 1.700000
>        CDF file version is 1.700000
>        encrypted name length is 12
>Aug 24 01:20:54 dcacars[20714]: could not get variable information
>Aug 24 01:20:54 dcacars[20714]: could not decode data 0
>
>Please let me know if you have ideas on what to try next.
>
>Thanks,
>
>Brian
>
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