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ZL3AI > APRDIG 31.07.03 18:28l 173 Lines 6427 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Jul 27, 1/1
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Sunday, July 27, 2003.
1. Weather stations
2. Fwd: SEA digi operations
3. West coast stations heard in the East
4. Re: Fwd: SEA digi operations
5. Band Opening - FM29
----------------------------------------------------------------------
Subject: Weather stations
From: "mike" <mserowik@adelphia.net>
Date: Sat, 26 Jul 2003 23:16:28
X-Message-Number: 1
Greetings,
I am in the final stages of putting up a Igate. I am looking for a
weather station addon to this. I have sean the tapr t238 weather station
and the microweather. Which one would be the best for a Aprs WX station?
Many thanks
Mike-N3BSQ
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Subject: Fwd: SEA digi operations
From: Tim Schall <ka7pbi@fortgirlfriend.ampr.org>
Date: Sat, 26 Jul 2003 23:13:24 -0700
X-Message-Number: 2
I just posted this to the local aprs mailing list but thought it might be of
interest here as well.
---------- Forwarded Message ----------
Subject: SEA digi operations
Date: Sat, 26 Jul 2003 23:10:58 -0700
From: Tim Schall <ka7pbi@fortgirlfriend.ampr.org>
To: naprssig@nwaprs.org
Greetins Everyone:
Just thought I'd drop a note and let everyone know about some slight changes
I've made to the operation of the SEA digipeater. As most people know, for
some time now the SEA digi has been 'actively encouraging' people to set
their paths to something of wide4-4 or less. I've not changed that 'trim'
setting to wide3-3 and updated the path swapping routine a bit to show what
the path was updated from. Take a look at these packets:
aprs: fm SEATAC to APRS via SEA* WAS5-5* WIDE3-2 GATE ctl UI pid=F0(Text) len
72
aprs: fm K7NWS-10 to APRS via SEA* WAS5-5* WIDE3-2 ctl UI pid=F0(Text) len 46
We can see that they came from calls of 'SEATAC' and 'K7NWS-10' and that SEA
was the first digi to touch it. The second entry in the path shows that the
hop count was 5-5 when it came into the SEA digi. That is 5 hops requested
and none used. We know that the correct setting is wide3-3. This person
wanted five and hasn't used any so we'll let him have the 3 we know is
proper. The packet would have left 5-4 if we hadn't dorked with it but we
did so it leaves wide3-2. One hop used. Now look at this packet:
aprs: fm VA7CC to 4YPSSW via VE7IPB-10* WAS5-3* WIDE3 ctl UI pid=F0(Text) len
13
From this packet we see that VE7IPB-10 trimmed the packet down from WIDE5-3
(Which is what it WAS...) to WIDE3...... BUT WAIT! That's not what happened
boss! SEA trimmed that packet. This is a programming error at the SEA digi
that will be corrected soon. I promise. So please don't blast some other
digi operator for what my digi is actually doing. :)
OK, great Tim. What about a packet of say wide6-1 that arrives at SEA.
That's 6 hops requested 5 used. You're willing to give up 3 hops. What
happens to that packet? That's easy. It gets dropped on the floor and
ignored. The digi does nothing to it. Doesn't modify. Doesn't send it.
Doesn't do squat to it.
A couple of other notes. The digi will not muck with packets that have the
emergency bit set. If you fire up your tinytrak or some such with the
emergency bit set and hit SEA with wide7-7 it will respect that.
I can exempt stations from the rule set on a call sign basis. So if someone
lives out in say Concrete, WA (Beautiful area BTW.) and uses a hop or two
just getting into the RF network then I won't molest his packets. Currently
there is no one on that list.
I can exempt stations from the rule set on a destination basis to. So if
there's a public service event and everyone puts a destination of "BIKTRK"
for example, into their path then the digi won't mess with those either.
Currently there is no one on that list either.
Any questions? Feel free to ask on the list or email me directly.
----------------------------------------------------------------------
Subject: West coast stations heard in the East
From: WB4GQK@aol.com
Date: Sun, 27 Jul 2003 06:33:57 EDT
X-Message-Number: 3
Hi Wayne et all,
Just to let you know in the last 24 hours I have recorded the following
stations in CA on the East coast.
Jim WB4GQK
N6TBQ-2
KQ6IK
W6OTH
KF6RAL-2
WA2KWR
WB6WLV-11
----------------------------------------------------------------------
Subject: Re: Fwd: SEA digi operations
From: Bob Bruninga <bruninga@usna.edu>
Date: Sun, 27 Jul 2003 08:40:28 -0400 (EDT)
X-Message-Number: 4
On Sat, 26 Jul 2003, Tim Schall wrote:
>aprs: fm VA7CC to 4YPSSW via VE7IPB-10* WAS5-3* WIDE3 ctl UI
>pid=F0(Text) len 13
>
>>From this packet we see that VE7IPB-10 trimmed the packet down from WIDE5-3
>(Which is what it WAS...) to WIDE3...... BUT WAIT! That's not what happened
>boss! SEA trimmed that packet. This is a programming error at the SEA digi
>that will be corrected soon.
Isn't that a proper response? WIDE5-3 has already used up two. Your
algorithm limits it to 3, so it converts to WAS5-3 AND then assumes it is
equivalent to WIDE3-1 which it digipeats and decrements to WIDE3-0 which
shows as WIDE3.
de WB4APR@amsat.org, Bob
THinking some more about it, I may have been over zealous, and although we
encourage 3-3, maybe we out to allow 4-4 sometimes.
Meaning, since we are finally puting some smarts in the network to police
paths, (the 7-7's are the ones that dirve us crazy)... maybe we should
just TRUNCATE to 4-4 and sitll continue with education to encourage 3-3?
Isnt Washington State for example want to bring in some packets from the
under populated hinterlands? Only locals can decide?
Bob
----------------------------------------------------------------------
Subject: Band Opening - FM29
From: "Bob D." <n2iph@comcast.net>
Date: Sun, 27 Jul 2003 11:47:31 -0400
X-Message-Number: 5
Hey, was just out in the garage where I have an old B&W TV for listening
to sports working out there or in the yard. It connected to a VHF/UHF
yagi about 16 ft up mounted in the attic space of the garage with a
fixed orientation towards Philadelphia and no pre-amp installed.
I was just (7/27/03 @ 15:40 GMT) flipping through the channels and
noticed I am getting some decent quality video and audio from NY City
stations 7 and 9 as well as Channel 2 (don't know where this is from)
and also 11 and 13. I usually only see 3, 6, 10, & 12 plus some Philly
UHF stations.
---
END OF DIGEST
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