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ZL3AI > APRDIG 08.08.06 14:49l 189 Lines 6764 Bytes #999 (0) @ WW
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Subj: [APRSSIG] Vol 26 #5, 2/2
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From: ZL3AI@ZL2BAU.#87.NZL.OC
To : APRDIG@WW
Message: 9
Date: Fri, 4 Aug 2006 13:46:04 -0700
From: Ben Jackson <ben_at_ben.com>
Subject: Re: [aprssig] Mic-E encoding on HF -- does generic SSID path GATE?
On Fri, Aug 04, 2006 at 02:49:24PM -0400, Stephen H. Smith wrote:
>
>Nearly all APRS HF receive stations igate received packets directly into
>the Internet system, along with any other functions such as cross-band
>digipeating.
I'm assuming that if I sent a packet with the path GATE (only) and it was
IGated by the HF receiver, the raw data on APRS-IS would look something
like src>APRS,GATE,qA?,hfgate*:...?
I'm fairly certain now that I'm hitting W7CCY (pretty much the one I
expected to hit):
http://www.findu.com/cgi-bin/find.cgi?moxie,mision,w7ccy
which is getting things to the internet indirectly through mountaintop
digipeaters that eventually reach home stations with internet connectivity.
Of course if I used 100 watts instead of ~3 I would probably reach more
than one...
APRS should really have a route like 'IGATE-n' which would mean 'if you can
IGate me, I'm done, otherwise digipeat up to n more hops'.
--
Ben Jackson AD7GD
http://www.ben.com/
------------------------------
Message: 10
Date: Fri, 4 Aug 2006 16:00:16 -0700 (PDT)
From: "Tyson S." <timbercutter_at_yahoo.com>
Subject: [aprssig] F5VAG map server
My F5vag scripts for the static maps on my UI-Webserver stopped working
yesterday and so I switched to the Gmap server code and it worked until
this afternoon, then stopped. Some of the webservers on the internet are
still working with the code, and others are not (Including the on on the
F5VAG website!). Has anyone else noticed this? Am I doing something wrong?
------------------------------
Message: 11
Date: Sat, 05 Aug 2006 01:01:15 -0400
From: "Stephen H. Smith" <wa8lmf2_at_aol.com>
Subject: Re: [aprssig] Mic-E encoding on HF -- does generic SSID path GATE?
ben_at_ben.com wrote:
>On Fri, Aug 04, 2006 at 02:49:24PM -0400, Stephen H. Smith wrote:
>
>>Nearly all APRS HF receive stations igate received packets directly into
>>the Internet system, along with any other functions such as cross-band
>>digipeating.
>>
>I'm assuming that if I sent a packet with the path GATE (only) and it
>was IGated by the HF receiver, the raw data on APRS-IS would look
>something like src>APRS,GATE,qA?,hfgate*:...?
You are confusing "IGATE" with "GATE".
The command "GATE" is only required to go from HF to VHF; i.e. to
crossband digipeat.
It *IS NOT* required to get into the Internet directly from HF. Igate
stations, either HF or VHF, will normally feed *ANY* valid packet they
hear, into the Internet system, regardless of paths stated in the packet.
Repeating my last post, the shorter the packet, the more likely it is to be
decoded successfully and considered "valid".
--
Stephen H. Smith wa8lmf (at) aol.com
EchoLink Node: 14400 [Think bottom of the 2M band]
Home Page: http://wa8lmf.com
------------------------------
Message: 12
Date: Fri, 4 Aug 2006 22:20:30 -0700
From: Ben Jackson <ben_at_ben.com>
Subject: Re: [aprssig] Mic-E encoding on HF -- does generic SSID path GATE?
On Sat, Aug 05, 2006 at 01:01:15AM -0400, Stephen H. Smith wrote:
>ben_at_ben.com wrote:
>>On Fri, Aug 04, 2006 at 02:49:24PM -0400, Stephen H. Smith wrote:
>>
>>>Nearly all APRS HF receive stations igate received packets directly into
>>>the Internet system
>>
>>I'm assuming that if I sent a packet with the path GATE (only) and it
>>was IGated by the HF receiver, the raw data on APRS-IS would look
>>something like src>APRS,GATE,qA?,hfgate*:...?
>
>You are confusing "IGATE" with "GATE".
Well, not really, I was just going to point out that the HF packets I'm
sending are not being IGated by the HF receiver, based on my understanding
of the 'qA?' markup done by the APRS-IS servers.
>Repeating my last post, the shorter the packet, the more likely it is to
>be decoded successfully and considered "valid".
Right, short is good, which is why I am asking about Mic-E encoding.
However, so short that it never gets IGated isn't good.
I suppose, then, that the shortest AND most likely to be IGated path on HF
is, in fact, 'ECHO', since the odds are that any HF GATE listening is going
to be able to hit several IGate-ing HF stations. Of course GATE,WIDEN-n is
probably less costly in overall airtime. Ideal would be no path (as you
say) with *just* enough power to hit an HF listener that can IGate.
--
Ben Jackson AD7GD
http://www.ben.com/
------------------------------
Message: 13
Date: Sat, 05 Aug 2006 08:32:23 -0400
From: "Robert Bruninga" <bruninga_at_usna.edu>
Subject: Re: [aprssig] Mic-E encoding on HF -- does generic SSID path GATE?
>>>ben_at_ben.com 08/05/06 1:20 AM >>>
>I suppose, then, that the shortest AND most likely to be
>IGated path on HF is, in fact, 'ECHO', since the odds are
>that any HF GATE listening is going to be able to hit several
>IGate-ing HF stations.
But adds maximum QRM to the channel.
Better to go just VIA GATE,WIDE2-1 since then every HF gate that hears is
will put it out to VHF where all VHF IGates will hear it.
>Of course GATE,WIDEN-n is probably less costly in overall airtime.
No, never use WIDEn-N with GATE, except for GATE,WIDE2-1 so that you limit
your QRM in all VHF networks to only the general area of the local IGates.
It is not good practice on any band or in any LAN to inject out-of-area
packets more than one hop into any network, because it leaves locals with
no control over the injection of what might be unwanted QRM.
de WB4APR, Bob
------------------------------
Message: 14
Date: Sat, 5 Aug 2006 09:36:09 -0500
From: "Mark Conner" <mconner1_at_gmail.com>
Subject: [aprssig] Seven balloon flights aloft over central Kansas
The 2006 Great Plains Super Launch is underway with seven flights aloft.
You can track them all at:
http://www.findu.com/cgi-bin/find.cgi?call=W0NSV-11,ae0ss-11,kd4sth-9,kb9qls-11c
,k5trb-11,kc0mwm-11,wb8elk-12
On RF, look for the payloads on 144.34 or 144.39 MHz.
More on the Super Launch at www.superlaunch.org.
73 de Mark N9XTN
------------------------------
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