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[aprssig] Object Timestamps and 111111

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Mon Dec 13 14:47:11 UTC 2010


Thank you.  These are the details that need to be on a web page 
somewhere.  I googled for it at aprs.org, but came up empty.  If we 
really want to see new client software developed, there really needs to 
be a one-stop definition of EVERYTHING that has evolved to date.  Not a 
list of "ideas" with no indication of what's really in use and what's 
just future thoughts and ramblings.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
(Yes, I believe it's time for aprs102.pdf or something equivalent to be 
authored with FULL details of what's real)

Bob Bruninga wrote:
>> Ok, so that's where the 111111 came from.  
>> Is it actually written down somewhere 
>> that new APRS implementations can learn about it?.
>>     
>
> Should be under aprs.org/aprs12.html
>
>   
>> What about the h format vs the z format,
>>     
>
> No, only the 111111z is defined as the NULL field.
>
>   
>> And what does the timestamp actually MEAN? 
>>     
>
> That is when it was reported at that position.  For permanent objects or objects transmitted by statios without real-time clocks, you can see why we needed a null value.
>
> Bob
>
>
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