bruninga at usna.edu
Fri Apr 4 12:48:17 CDT 2008
> That's not counting the bytes in the
> destination address field, though!
If you are going to send it over AX.25 packet you are stuck with
the AX.25 addresses. So the Mic-E only uses 9 bytes. And those
9 bytes carry not just position, but also includes Course,
Speed, a symbol code for over 3000 different symbols, and a 3
bit message code.
> We were talking about how compact you can make things
> without worrying about backwards compatibility.
But, As you know, I worry *very much* about maintaining
compatibility of all APRS systems for all users...
> ----original message -------
> >> What I found is that even in my own dabblings
> >> here, I can pack data much more efficiently.
> >> Astrerix works something like this
> >> 40 00 16 30 27 34 56 43 45 45 67
> > But a Mic-E packet only takes 9 Data bytes:
> > 'LLLCSP$\
> > And it is decodable by all existing APRS systems.
> > No real need to come up with incompatible formats
> > on APRS that existing users cannot decode...
> > Bob, Wb4APR
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