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[aprssig] Help with q-Constructs

Gerhard.F5VAG f5vag.eu at gmail.com
Wed May 16 21:33:56 UTC 2012

They do the I construct if you tell them to do so in the IGATE setup

Gerhard, F5VAG

On Wed, May 16, 2012 at 11:26 PM, Lynn W. Deffenbaugh (Mr)
<ldeffenb at homeside.to> wrote:
> I thought APU25N (shows as UI-View32 V2.03 at
> http://nebraska.aprs2.net:14501) was the latest (read: last) available
> UI-View version? Or are you saying that none of the UI-View versions
> (because they're "older") do the I or qAR constructs?
> Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
> On 5/16/2012 5:08 PM, Pete Loveall AE5PL Lists wrote:
>> KC0WIF-1 is running an older version of UI-View
>> (KC0WIF-1>APU25N,TCPIP*,qAC,T2NBRASKA:=4427.76NI10021.45W&APRS iGate -
>> Pierre, SD) and is not using either the I or qAR construct.  That is why you
>> see qAS.  T2NBRASKA knows the packet is being passed to it by KC0WIF-1 and,
>> according to the q algorithm, can only assume that KC0WIF-1 is a server
>> since there is no IGate indicator in the path.
>> Hope this helps.
>> 73,
>> Pete Loveall AE5PL
>> pete at ae5pl dot net
>>> -----Original Message-----
>>> From: John Gorkos
>>> Sent: Wednesday, May 16, 2012 2:54 PM
>>> I'm working on the javAPRSlib parsers again, and I need a little help
>>> understanding the Q-constructs as injected by the APRS servers.
>>> Here's a sample beacon:
>>> N0NPO-1<http://aprs.fi/?c=raw&limit=&call=N0NPO-1>  >APOT21,WIDE1-
>>> 1,WIDE2-2,qAS,KC0WIF-1<http://aprs.fi/?c=raw&limit=&call=KC0WIF-1>
>>> :!4422.30N/10023.30W>235/008/A=000593 13.7V  76F
>>> So, this device is set to beacon to WIDE1-1, WIDE2-2.  According to
>>> Pete's q-
>>> Construct page:
>>> qAS - Packet was received from another server or generated by this
>>> server.
>>> The latter case would be for a beacon generated by the server. Due to the
>>> virtual nature of APRS-IS, use of beacon packets by servers is strongly
>>> discouraged. The callSSID following the qAS is the login or IP address of
>>> the
>>> first identifiable server (see algorithm).
>>> (http://www.aprs-is.net/q.aspx)
>>> I don't believe this is the "latter case", so what exactly has happened
>>> here?
>>> Is this as simple as the IGATE KC0WIF-1 picking this packet up directly
>>> on the
>>> air and sending on to APRS-IS?  If that's the case, why isn't the qAR
>>> construct
>>> used?  is there a simple explanation of the difference, that I can put in
>>> my
>>> "APRS for Dummies and Naval Academy Graduates" notebook?
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