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[aprssig] Re: FINAL note on the 1 foot precision debate

Robert Bruninga bruninga at usna.edu
Thu Jan 5 02:12:03 UTC 2006


>>> kevin at kevinratcliff.com 01/04/06 8:47 PM >>>
>I must have missed part of this discussion. I 
>understand there is the proposed !DAO! format, 
>but what are the other two methods Xastir (or 
>other client software) can use to transmit ~1 ft 
>precision and still maintain compatibility?

Actually there are more than 4, and all of them
are compatible with the kenwoods.

1) Send the OBJECT as a compressed POSITION by 
simply changing the callsign in the packet to the 
name of the object.

2) Send the object as a 3rd party compressed position
report format

3) Send the object as a raw GPS NMEA string

4) Implement the proposed !DAO! format.

Personally, I would prefer to see option #1.  This
is even more efficient than the compressed object
report.  And the kenwoods can see and display all
of the above I am pretty sure...

de Wb4APR, BOb

>>> Robert Bruninga 01/04/06 11:57 AM >>>
Copy for those that have quit reading this diatribe....
and a few corrections...

************************************
Here is the bottom line on this debate.  I have no more
time for this refusal of XASTIR to move beyond the
1 foot precision problem.

1) XASTIR insists on sending the depricated obsolete
compressed object /item format that has been known
to not work on the thousands of Kenwoods for many 
years which  reprsents 85% of our mobile APRS community 
that sees objects in their mobiles.  This undermines the
communications on-air integrity of APRS when mobiles
cannot see these objects.

2) Yet there are 3 ways XASTIR could UPGRADE and
transmit objects to 1 foot resolution if they wanted
to instead of just bashing kenwoods, and using an
old format known not to work.

a) use KISS mode and send the object as a $GPGGA packet
b) Send the object in 3rd party format as a $GPGGA packet
c) IMplement the new APRS 1.1 !DAO! format.

To me, This insistnce on using the obsolete/depricated 
compressed object/item format is what is holding back 
progress, missleading the community, and bashing a
very useful product (Kenwoods) that almost half of us 
depend on for our APRS picture.

If XASTIR would instead, use one of the existing formats
or update to the APRS 1.2 spec  proposal which does try to 
be responsive to user needs, then ALL users will be able to 
see what is on the air at a come-as-you-are event even if
the sender is using XASTIR.

de WB4APR, Bob





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