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[aprssig] What stations should respond to APRS queries?

Andrew P. andrewemt at hotmail.com
Fri Mar 9 17:56:24 UTC 2012

Funny. A ?APRSD query on your station didn't work for me, and I can do so to one of Lynn's APRSISCE servers. But I am seeing your station acknowledge my message (because I put a sequence number in the query message). Very odd. I tried doing a ?APRSP on your station as well, and I started seeing MicE position messages from you (but is that just a feature of the APRS-IS backbone's default filtering?). ?APRSS doesn't work on you either.

I also tried starting up my own copy of Xastir (v1.9.8) with only an Internet connection and sending queries from it to my own software; I don't see the incoming queries from the Xastir instance (although Xastir is seeing incoming station traffic from APRS-IS).

So, I'll have to get a better RF connection and try polling some of the RF-local Xastir stations and see what happens.

Andrew Pavlin, KA2DDO

> From: javier at kjsl.org
> Date: Thu, 8 Mar 2012 23:33:32 -0500
> To: aprssig at tapr.org
> Subject: Re: [aprssig] What stations should respond to APRS queries?
> On Mar 8, 2012, at 4:15 PM, Curt, WE7U wrote:
> > On Thu, 8 Mar 2012, Andrew P.  wrote:
> > 
> >> I'm curious, because I don't seem to be able to get answers from any clients (other than other instances of my own) from an IGate-only connected client.
> > 
> > If I recall correctly, Xastir has a small subset of queries it answers.  It only answers if the query was received on RF and sends the responses to RF.
> Query K4JH-1 with ?APRSD over the 'net and it will respond over the net. Every other Xastir instance I tried just now did it as well.
> 73,
> -jav k4jh
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