[OZAPRS] MICE usage

Fri Sep 26 14:25:00 EST 2014

Hi All

I notice this spot today VK2TSB-13. His position tends to jumps around a
bit as well. The difference here is VK2TSB-13 doesn't use MICE? So his
packets are uncompressed

My guess is GPS isn't locked.

2014-09-26 03:52:36 UTC: *VK2TSB-13
<http://aprs.fi/?c=raw&limit=&call=VK2TSB-13>*>APT311,VK2AMW-1*
<http://aprs.fi/?c=raw&limit=&call=VK2AMW-1>,WIDE2-1,qAR,VK2NR-5
<http://aprs.fi/?c=raw&limit=&call=VK2NR-5>
:!3513.54S/14808.27ER000/000/A=000000
2014-09-26 03:52:57 UTC: *VK2TSB-13
<http://aprs.fi/?c=raw&limit=&call=VK2TSB-13>*>APT311,VK2AMW-1*
<http://aprs.fi/?c=raw&limit=&call=VK2AMW-1>,WIDE2-1,qAR,VK2NR-5
<http://aprs.fi/?c=raw&limit=&call=VK2NR-5>:!3433.81S/15049.81ER000/000/A=000045
*[Location changes too fast (adaptive limit)]*
2014-09-26 03:54:36 UTC: *VK2TSB-13
<http://aprs.fi/?c=raw&limit=&call=VK2TSB-13>*>APT311,VK2AMW-1*
<http://aprs.fi/?c=raw&limit=&call=VK2AMW-1>,WIDE2-1,qAR,VK2NR-5
<http://aprs.fi/?c=raw&limit=&call=VK2NR-5>
:!3434.41S/15049.35ER169/020/A=000095

73

Dom
VK2HJ

On Fri, Sep 26, 2014 at 7:02 AM, Ian Bennett <ibennett at tpg.com.au> wrote:

> All,
>         My turn.....
>         I too don't fully understand what MIC-E is (apart from it is a
> compression method) however in the
> doco I've read, they recommend using it unless there is a specific reason
> not to. They don't mention
> what a "specific reason" is though.
>         Whilst on the subject, the documentation available is terrible.
> The term "documentation" is used
> loosely here since the information I've found is more a collection of
> thoughts. Manufacturers of
> commercial trackers have to shoulder most of the responsibility here as
> this is what most people
> will use.
>         I had a cackle when I read the comment "Hams doing what they want
> as individuals" as I whole
> heartedly agree. The fact that people are still using the -15 SSID for HF
> is a case in point. Bob
> took this out of the "RFC" years ago. Still, these are only guidelines
> anyway and I never used the
> -15 SSID as I had VHF APRS running at the same time. Having two SSID's
> coming from the same vehicle
> would have been very confusing for anyone tracking us.
>         So, why do I use APRS?? It is what attracted me into Amateur Radio
> in the first place. My wife and
> I travel a fair bit (not as much as I would like though!!) into remote
> areas of the country and APRS
> allows family and friends to see where we are. I also use PSKMail (another
> culprit for terrible
> documentation) for email and to post updates to trip blogs when out of
> mobile phone range.
>         When back at the coal face, we only use one vehicle and APRS
> allows me to see where she is so I can
> meet her as she arrives to pick me up.
>         I've even had turn-by-turn guidance over the radio by another
> amateur when I was going to his place
> (I missed a turn so he guided me in!!)
>         It is also handy when visiting family and friends as they know
> when to put the kettle on ;-)
>         I think the WIDE-N paradigm is a good compromise from an all
> knowing intelligent routed network.
> What needs to be considered is the location of the digis.
>         Given we as a community can't get the simple things right, imagine
> what would happen if some sort
> of intelligent routing protocol were implemented into the APRS network??
> It is exactly this that
> keeps me employed in the IT trade.
>
> Ian
> VK1IAN
>
>
> On 26/09/14 01:22, Peter Richens wrote:
> > Hi
> >
> > Part of the problem for someone like me.. as an example..
> > I have not had anything to do with this in the past but want to find out
> > more.. problem is there seems to be little in the way of good guides that
> > don't conflict with someone else's version of the guide and I am still in
> > the dark as to what to use this for apart from tracking my vehicle.. I
> have
> > also loaded the app on my Android phone and while it's fun to play with
> I am
> > still a little miffed as to what the real world application for this is..
> > I have been a Licensed Amateur since around 1986 and had my full licence
> > since 1988, have played with Packet Radio for years until I moved to
> > Brisbane and life just got too hectic then the internet basically took
> over
> > and sending packets at 1200baud just seemed so painful..
> >
> > I want to get my teeth into something and this among options available
> > seemed like a fun thing to play with but how far do I go with it and how
> do
> > I actually progress..
> >
> > I did read something about a system being used for disaster
> communications
> > and seen to think this may have been it, something to do with knowing
> what
> > resources are around.. if that is the case how do we use it for that..
> >
> > I am quite certain that this is not puzzling for just me, the VK2 Guy
> that
> > is beaconing.. well that could just have been me as I think mine is doing
> > something similar, even though I thought it had been set to only beacon
> when
> > moved.. actually on that it would be nice if it beaconed more regularly
> > sometimes.. or maybe not!
> >
> > Then comes HF or rather long distance travel such as my recent trip to
> Cape
> > York, I am more than certain that there are not that many VHF stations up
> > that way except for Cairns and maybe Cooktown..
> >
> > Regards
> > Peter Richens - VK4FSD
> > River City 4WD Club - Past President 2010 - 2014
> > Sent from my Thumping huge Laptop
> >
> >
> > -----Original Message-----
> > From: OZAPRS [mailto:ozaprs-bounces at aprs.net.au] On Behalf Of Justin
> Albury
> > Sent: Thursday, 25 September 2014 9:54 PM
> > To: Australian APRS Users
> > Subject: Re: [OZAPRS] MICE usage
> >
> > So to remove a few of these issues we have done a new config and
> alignment
> > of a replacement VK2RHR-1 digi as a "hot swap" .... this will be more of
> a
> > fill digi rather than it current config.
> >
> > As soon as I get a chance I will visit Highrange and do the swap.
> >
> > Will keep you posted
> >
> > VK2HJA
> >
> >
> > Justin Albury
> > J Albury Communications
> > justin at jacomms.com
> > 0417246791
> >
> > -----Original Message-----
> > From: OZAPRS [mailto:ozaprs-bounces at aprs.net.au] On Behalf Of Owen Duffy
> > Sent: Thursday, 25 September 2014 6:01 PM
> > To: Australian APRS Users
> > Subject: Re: [OZAPRS] MICE usage
> >
> > Hello All,
> >
> > Some thoughts on the issue:
> >
> > I think the real issue here is the failure of source routing, whether you
> > give it some grand name like "New N Pardigm" or not.
> >
> > There are numerous examples that demonstrate that you cannot depend on
> hams,
> > whether they operate end stations or 'infrastructure' (digis,
> > iGates) to "do the right thing'.
> >
> > Hams doing what they want as individuals were responsible for the demise
> of
> > the old 'packet network' before its time, and the same problem occurs
> with
> > APRS.
> >
> > So, if you drive outside Sydney or Melbourne for your annual holidays,
> and
> > you set your path for WIDE1-1,WIDE2-2, what is wrong with that?
> >
> > Well the issue is that the optimal path is not a property of the mobile,
> but
> > its location. In some places, a single hop is sufficient to have a high
> > probability of iGate submission, in others, three hops might only
> moderate
> > probability of iGate submission.
> >
> > Then there are the  effects of band openings (most mornings and evenings
> in
> > summer) where three hops may well get you from Sydney to Melbourne.
> >
> > A possible solution is intelligent network infrastructure that controls
> > packet routing, and limits the lifetime of packets. It could also be
> used to
> > block misguided stations operating outside of reasonable parameters on
> the
> > shared radio channel.
> >
> > That means finding a flexible routing platform for digis, especially
> > strategic digis that could be used to segment the network into local
> areas
> > as congestion dictates. Such a platform needs to be highly interoperable,
> > there is no room for a digi that does not decode some popular trackers
> (eg
> > the incompatibility between OT3 and Foxtrack/TT1).
> >
> > Sydney is a most interesting case study, it has essentially no 'local'
> > digi and depends on three digis 40-60km out, and most packets that
> originate
> > or enter the area are repeated by all three digis so increasing channel
> > utilisation which in turn reduces the effectiveness of the network for
> > position reporting of mobile stations.
> >
> > A filtering dig in each of the three locations to block traffic flow from
> > north to south, and south to north could be very effective in reducing
> > channel utilisation whilst still support high rate of iGate submission.
> >
> > The role of High Range and Mt Murray, both W2 digis located with 40km of
> > each other deserve review as under the "New N Pardigm", almost all
> packets
> > originating in Sydney and the Illawarra carried by one will be carried
> also
> > by the other.
> >
> > At the same time, coverage of half of the M7 is patchier than a lot of
> major
> > highways outside of Sydney.
> >
> > I think it is the infrastructure that deserves attention rather that
> trying
> > to educate end users.
> >
> > Over...
> >
> > 73
> > Owen
> >
> > _______________________________________________
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