[OZAPRS] Re: [aprssig] Re: !DAO! question

[Darryl Smith]

This is being worked on

Darryl

-----Original Message-----
From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On
Behalf Of Andrew Rich
Sent: Saturday, 29 March 2008 7:52 AM
To: bruninga at usna.edu; TAPR APRS Mailing List
Cc: 'Australian APRS Users'
Subject: [OZAPRS] Re: [aprssig] Re: !DAO! question

What has happened to the aprs spec ?

the links dont work on the tapr site


----- Original Message ----- 
From: "Robert Bruninga" <bruninga at usna.edu>
To: "'TAPR APRS Mailing List'" <aprssig at lists.tapr.org>
Cc: "'Australian APRS Users'" <ozaprs at aprs.net.au>
Sent: Saturday, March 29, 2008 3:20 AM
Subject: RE: [aprssig] Re: !DAO! question


>> I just enabled the DAO support on the OT.
>> I can't see how this increases the resolution ?
>> 
>> So how does just by adding !W46! increase res ?
> 
> The !DAO! Construct was invented to be able to add higher
> precision to all future APRS code that was fully backward
> compatible with all existing code.  In otherwords, existing code
> would still display the new object or station at at least the
> minimum precision that it already had.
> 
> This prevents such new high-precision "senders" from
> disappearling off of all existing 30,000 users displays...
> 
> Anyone can transmit !DAO! At any time.  But to receive and
> display that added precision, then the receving application has
> to implement the higher precision, parse the !DAO! and use it or
> display it.
> 
> So get a client that supports it.  But higher precision is
> meaningless without sender and receiver using the same datums
> and corrections.  So that iw why DAO includes provision for that
> kind of handshaking as well
> 
> Good luck
> Bob, WB4APR
> 
> 
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> aprssig at lists.tapr.org
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>
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