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[aprssig] BALDY APRS Station

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Mon May 21 18:16:47 UTC 2012


Similar to frequency objects (but limited to 6 characters for stations, 
not 9 for objects), make it a suffix on the tactical call.  That way 
both events can quickly see SAGn, FIN, STR (or GO), but they all have a 
2 character suffix within the 6 first characters or after a - in an object.

SAGnEV (station) or EVSAGn
TAILEV (station) or EVTAIL
FINISH-EV (object) or EV-FINISH
START-EV (object) or EV-START

and so forth where EV is a unique (hopefully) tag describing the event.  
It could, of course, always come first (as shown) which would aid 
APRS-IS wildcard filters, but I find the suffix more quickly deciferable 
for the station's function.

Just because there's a lot of bad-mouthing of "couch potatoes" and "it 
wasn't meant for global views", doesn't mean that tactical collisions 
can be blithely ignored.  If we all pay attention to making our 
tacticals unique for a specific event, then we have nothing to worry 
about even when a 2m opening happens during the event and we start 
hearing packets from a similar even two states away!

The issue isn't specific to APRS-IS, but can happen on RF as well, so 
it's worth striving for some sort of uniqueness before Murphy drops that 
band opening in the middle of your (non-unique) event.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 5/21/2012 1:59 PM, n7qnm-lists at nwlink.com wrote:
> As a frequent "client" of the ORIGINAL (at least in time) BALDY and a
> frequent "luker" here;  I think both John and Lyle have some good points.
>
> Is there perhaps another way (Comment?) for INFRASTRUCTURE stations to
> identify their location to folks with limited display width (ala HamHud or
> Kenwoods)?    That might help address the issue; but at the same time one
> could then use local filters to eliminate "noise" from DISTANT tactical
> calls.
>
> Other the other hand, there's still a potential issue here, particularly
> if folks don't follow the right PATH rules.   I can easily see calls  like
> "SAG" or "START" or "FINISH" being used by two groups within range of the
> same mountaintop.  That would definitely cause chaos.
>
> Perhaps some some sort of prefix could be added - ala SMSAG1, SMSTART, or
> SMFIN (Seattle Marathon)?
>
> Clay
> N7QNM
> N7QNM-9
> N7QNM-10
>
>> I repeat my original PS:
>>
>>> No, I'm not trying to start a flame war about Tactical station IDs.
>>>   I'm just trying to help the collisions get sorted out as I notice them.
>>
>> On 5/21/2012 9:11 AM, John Gorkos wrote:
>>> A considerate APRS manager would include RFONLY or NOGATE in the path
>>> of all tactical stations.
>> Actually, that choice alienates a bunch of hams assisting with an event
>> that may not have APRS RF capability but COULD remain aware of the
>> overall situation via an APRS-IS client filtered to the local area to
>> avoid any potential interference from duplicate tactical calls.  You
>> might as well keep all your packets 7 bytes shorter (the length of a
>> path component in the AX.25 header) and let the APRS-IS do whatever it
>> wills with the tactically-named stations' packets.
>>
>> Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
>>> John Gorkos
>>> AB0OO
>>>
>>
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