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Re: [gpsd-users] problem decoding type 24A AIS packets


From: Eric S. Raymond
Subject: Re: [gpsd-users] problem decoding type 24A AIS packets
Date: Sun, 4 Mar 2012 20:44:09 -0500
User-agent: Mutt/1.5.21 (2010-09-15)

Roy Barkas <address@hidden>:
> The version of gpsdecode that I'm using returns nothing when it is
> presented with a AIS type 24A message.  It does decodes type 24B just fine.
> 
> If I put the following (evidently valid) sentences into a file called
> test24 and run:
> $gpsdecode -J < test24 I get no output from gpsdecode.
> 
> All other AIS message types that I have tried work just fine including type
> 24B.
> 
> !AIVDM,1,1,,,H3P;address@hidden@40000000000000,2*4C
> !AIVDM,1,1,,A,H7P?p61T5L4L586222222222220,2*2F
> !AIVDM,1,1,,,H6<address@hidden:1A<4U8000000,2*03
> 
> I'm using the version of gpsdecode / gpsd that is available in Ubuntu's
> repositories for Ubuntu 10.04.4 LTS.
> 
> gpsd -V yields:
> 
> gpsd: 2.92 (revision svn)
> 
> When I run gpsdecode -V I see:
> 
> SVN ID: $Id: gpsdecode.c 6965 2010-01-30 14:19:42Z esr
> 
> Have there been bug-fixes or changes since 2.92 that might solve this
> problem?

Evidently not.  I'm also getting failure to decode here.  I'll investigate
and fix.

> Is there a Debian / Ubuntu package for installing gpsd v3?

There is, but I do't know that it ha been backported to 10.x.
-- 
                <a href="http://www.catb.org/~esr/";>Eric S. Raymond</a>



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