[aprssig] Protocols

[Robert Bruninga]

> 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