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ZL3AI > APRDIG 04.06.03 09:11l 236 Lines 9187 Bytes #999 (0) @ WW
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Subj: TAPR Digest, May 28, 2/3
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Sent: 030603/1307Z @:ZL3VML.#80.NZL.OC #:1605 [Chch-NZ] FBB7.00i $:1410-ZL3AI
From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: [aprssig] Change in Wxsvr Output July 1st
Hello all-
Wxsvr has been sending a compressed packet along with the normal
multiple area packets for over a year. At the present time Aprs+,
xastir, and Ui-view support this new format. In order to clean up the
datastream, I will be terminating the uncompressed multiple area
packets July 1st. The majority of these occur in the winter months,
where vast areas can be put under winter weather watches and warnings.
The other large area bulletin makers are flood advisories. In the
winter months the multiple area packets can be as much as 60 per cent of
the output of Wxsvr- a waste of bandwidth on the rf side.
This has no effect on "short fuse" bulletins such as tornadoes, severe
thunderstorms etc. which fit into one packet already.
See:
http://wxsvr.net/Compressed_Format.html
73 de kg5qd Dale
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Subject: Re: DT and 100 pl ?
From: "B. Hildebrand" <bhildebrand@earthlink.net>
Date: Wed, 28 May 2003 10:14:27 -0700
X-Message-Number: 13
>I have been running voice alert on my D-700 since it was first suggested.
>......... Don't knock it till you try it.
>------------------------------
>>On Wed, 28 May 2003, Coe wrote:
>>THD7A/G
>>If I set the transmit PL to 100 will it send pl with posit from the tnc?
>
>Of course if everyone did that, there would be no need to have pl on voice
>for the voice alert system to work since we would all be listening to
>all of the 'packet racket' waiting for a voice signal.
No, only those that you hear direct. The P.L. tone does not get digipeated.
You are only listening for simplex range stations. Now if you are in one of
those rare locations where there are a lot (a relative term) of APRS
stations that all hear each other direct, then Voice Alert (VA) might not
work well. Don't run RELAY,WIDE,WIDE, or RELAY,WIDE2-2 in those areas also!
But for the majority of U.S., VA is a good way to find stations in simplex
range. BH KH2Z
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Subject: Re: DT and 100 pl ?
From: Bob Bruninga <bruninga@usna.edu>
Date: Wed, 28 May 2003 13:19:19 -0400 (EDT)
X-Message-Number: 14
>>THD7A/G
>>If I set the transmit PL to 100 will it send pl with posit from the tnc?
>
>Yes, it will send PL also on the packets. That is how other people konw
>you are in voice simplex range, because then they will hear your packet.
On Wed, 28 May 2003, Radio_Q wrote:
>Unfortunately, if everyone does this, it's the same as listening to the
>packet channel in it's normal mode.
Not at all. About 100 to 1. The only packets you will hear are from
other D7/700's within simplex range of you. Of the 250 people you can
probably receive packets from, probably only 1 or 2 of them is a D7 or
D700 within simpex range of you... Even if you hear him, its only 1
packet every minute or so...
>I can only do that for about 1 minute before I turn off the speaker!!
>Thus transmitting a 100Hz PL with the normal packet traffic negates the
>entire value of listening on 144.39 with the PL squelching out all but
>voice traffic.
At least where I live (Wasington DC/Baltimore/Annapolis) and with about
10 Kenwood mobiles, the only time I hear one is when he is within about 3
miles of me... ANd then it is only one packet every few minutes or so.
Kinda like a nice reminder that he is nearby...
Remember 99% of the packets on 144.39 come from digipeaters. And they
should NEVER use PL 100.
Bob
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Subject: Re: DT and 100 pl ?
From: Alex <kr1st@amsat.org>
Date: Wed, 28 May 2003 13:33:09 -0400
X-Message-Number: 15
"B. Hildebrand" wrote:
>Now if you are in one of
>those rare locations where there are a lot (a relative term) of APRS
>stations that all hear each other direct, then Voice Alert (VA) might not
>work well.
I fully agree. Makes totally sense. Voice Alert works best in areas
where you have the least chance of hearing anyone else direct. In areas
where you have the best chance to hear anyone direct, don't use it.
73,
--Alex KR1ST (absurdity: considering packet as interference on a packet
channel)
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Subject: Re: DT and 100 pl ?
From: Bob Bruninga <bruninga@usna.edu>
Date: Wed, 28 May 2003 13:59:42 -0400 (EDT)
X-Message-Number: 16
On Wed, 28 May 2003, Alex wrote:
>I fully agree. Makes total sense. Voice Alert works best in areas
>where you have the least chance of hearing anyone else direct. In areas
>where you have the best chance to hear anyone direct, don't use it.
Well, I donno about you, but I like to hear when someone else is simlex to
me out on the road. These days you can scan 50 voice repeaters and never
find anyone to talk to on HAM radio... Hearing another voice alert packet
assures you someone is on the road, nearby and alive.
I ran voice alert at Dayton (worst case scenario) and only heard two
others... Thats only a packet or so per minute...
As an aside, I certainly hope that no home stations run PL 100 on their
transmit side! Now that would be irritating.
Bob
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Subject: Re: New Feature for All APRS Client Software
From: Bob Bruninga <bruninga@usna.edu>
Date: Wed, 28 May 2003 14:26:11 -0400 (EDT)
X-Message-Number: 17
On Wed, 5 Jun 2002, hasan schiers wrote:
>... why we see [some] garbaged wx packets on the D7 and D700. They
>are... the result of "raw" wx packets being transmitted by remote stand
>alone weather stations.... [which] cannot be decoded by the D7 or
>D700...
>
>Bob, WB4APR included a "decode/translate and retransmit" feature into
>aprsDATA, that solves the problem...
>
>Now...here's an idea. All the APRS client software (APRS+SA, WinAPRS,
>UIview, pocketAPRS, Xastir, aprsCE, etc.) should have the capability to
>translate and retransmit just like aprsDATA does. Then the problem would be
>solved. (except for network congestion.)
>snip
>Is there some obvious reason I have missed why this feature has not been
>incorporated into ANY of the software listed above?
Yes, total conjestion!... But
Actually, I think EVERY APRSdos system can send you the WX from such a
weather station. Just send a Query to any APRSdos station asking about
station XYZ (the WX station of interest). The APRSdos station will
respond with a position for that station and since APRSdos converts all
weather to the "complete" format, what you will get is a complete report
for that station.
Bob
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Subject: APRS Client Longevity
From: Curt Mills <hacker@tc.fluke.com>
Date: Wed, 28 May 2003 14:47:47 -0700 (PDT)
X-Message-Number: 18
The last time this subject came up (about three months ago), I hadn't tried
long-uptime as a specific trial with Xastir. Old versions of Xastir aren't
particulary interesting to me, what with new features being added
constantly and all that. It's more interesting to keep up with the
developers and run the latest version.
Well, suffice it to say that I left one version running since then, just to
see how it would do. It has been hooked to a real internet feed full-time,
and for most of that time it was set to track my Jeep, draw maps, and
create web page snapshots. It wasn't just idling along, I made it work
hard. A good portion of the time it was set to download on-line satellite
images or on-line Tigermap maps for wherever my Jeep was at the time.
That instance of Xastir has now been running for 90 days, 3 hours, 42
minutes.
The Linux box itself has been up for 181 days, 23 hours, 19 minutes.
During that time I usually had two or three more instances of Xastir
running that I was playing with (running as different logins). That way I
didn't have to give up the latest features in order to run this test.
Ok, I did it. What's next?
--
Curt Mills, WE7U hacker_NO_SPAM_@tc.fluke.com
Senior Methods Engineer/SysAdmin
"Lotto: A tax on people who are bad at math!"
"Windows: Microsoft's tax on computer illiterates!" -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"
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Subject: Re: Pocket APRS 1.94 ack problem
From: James Smith <k9apr@sbcglobal.net>
Date: Wed, 28 May 2003 18:33:14 -0500
X-Message-Number: 19
Coe,
I have 1.94 here and haven't experienced the problem your talking
about..... But you can look here a see what changes have taken place
between 1.20 and 1.94... http://www.pocketaprs.com/upcoming.html
--
73, James, K9APR Webmaster Webmaster
Chairman \ Coordinator Indiana Repeater Council Henry Co.
Amateur Radio Club
Tri-State APRS Working Group http://www.ircinc.org
http://www.qsl.net/hcara
http://www.tawg.org
mailto:k9apr@tawg.org
Run a APRS Website? Why not join the APRS Webring. http://www.tawg.org/join.htm
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