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ZL3AI > APRDIG 15.03.07 02:03l 255 Lines 9440 Bytes #999 (0) @ WW
BID : 9836-ZL3AI
Read: GUEST
Subj: [APRSSIG] Vol 33 #3, 1/2
Path: DB0FHN<DB0MRW<DK0WUE<DB0RES<ON0AR<HS1LMV<SV1CMG<ZL2BAU
Sent: 070315/0043Z @:ZL2BAU.#79.NZL.OC #:37492 [Waimate] $:9836-ZL3AI
From: ZL3AI@ZL2BAU.#79.NZL.OC
To : APRDIG@WW
Today's Topics:
1. Re:All APRS Digipeaters In The World (Almost!) Mapped On UIview (Phillip)
2. Re: Re:All APRS Digipeaters In The World (Almost!) Mapped On UIview
(Stephen H. Smith)
3. Re: Re:All APRS Digipeaters In The World (Almost!) Mapped On UIview
(Ray Wells)
4. RE: Re:All APRS Digipeaters In The World (Almost!) Mapped On UIview
(Robert Bruninga)
5. Kantronics KPC3 (David Holm)
6. RE: Re:All APRS Digipeaters In The World (Almost!) Mapped On UIview
(rcluster_at_comcast.net)
7. Re: Re:All APRS Digipeaters In The World (Almost!) Mapped On UIview
(Stephen H. Smith)
8. Telemetry definition messages (Andy AB9FX)
9. grid square above 128m (Warren Brown)
10. APRS I-Gates Mapping Idea (Mark Cheavens)
11. RE: Telemetry definition messages (Robert Bruninga)
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Message: 1
Date: Sat, 3 Mar 2007 08:04:16 +1300 (New Zealand Daylight Time)
From: "Phillip" <zl2tze_at_yahoo.com.au>
Subject: [aprssig] Re:All APRS Digipeaters In The World (Almost!) Mapped On
UIview
Hi,
Well done Stephen..
FYI NZ has far more digis than shown.
Many NZ station act as a Gateway / Node / Digi but would in most cases use
either Gateway or Node with a few dedicated Digi. These stations are mainly
owner operator with a few club operated digis.
The problem is that there is no Multi Task symbol for the station that does
all 3 things Gateway / Node / Digi etc Maybe a Multi Task symbol could be
produced :-)
In reflection your Map of NZ would be missing over 2/3rds of the available
APRS Digis available to users.
This could also be a problem for your WW map as you only collected data with
a STAR Symbol, others around the world may be doing the same, and using a
symbol that reflects there primary use only.
73 Phillip
ZL2TZE
------------------------------
Message: 2
Date: Fri, 02 Mar 2007 11:30:05 -0800
From: "Stephen H. Smith" <wa8lmf2_at_aol.com>
Subject: Re: [aprssig] Re:All APRS Digipeaters In The World (Almost!) Mapped
On UIview
zl2tze_at_yahoo.com.au wrote:
>Hi,
>
>Well done Stephen..
>
>FYI NZ has far more digis than shown.
>
>Many NZ station act as a Gateway / Node / Digi but would in most cases use
>either Gateway or Node with a few dedicated Digi. These stations are mainly
>owner operator with a few club operated digis.
>
>The problem is that there is no Multi Task symbol for the station that does
>all 3 things Gateway / Node / Digi etc Maybe a Multi Task symbol could be
>produced :-)
>
>In reflection your Map of NZ would be missing over 2/3rds of the available
>APRS Digis available to users.
>
>This could also be a problem for your WW map as you only collected data with
>a STAR Symbol, others around the world may be doing the same, and using a
>symbol that reflects there primary use only.
Since digipeater operation has a greater impact on surrounding users than
any other station activity (i.e. weather stations and igates don't generate
multiple transmissions after OTHER stations transmit), I would tend to
think that any multi-tasking station should give priority to the digipeater
symbol.
I suppose one kludge solution would be to connect a TinyTrak in parallel
with your main TNC. Set the TT to the same callsign as the main station,
and set it to alternately beacon primary and alternate settings with a
different symbol selected in each side. For example, the main TNC could be
set to beacon "DIGIPEATER", the TT primary could be set to "IGATE" and the
TT secondary to "WX". This would even give the option to use different
paths (i.e. direct, one hop, or two hops) for each symbol if desired.
You would have to use a diode matrix to combine the main TNC's CD and PTT
lines into the TT CD to prevent the TT from keying up when the main unit is
either receiving or transmitting.
This is one place where a standalone KPC3+ or UIdigi-equipped TNC2 has a
real advantage over most programs on a PC, since you can set three
different beacon texts, each with it's own repetition rate, path and
symbol.into these devices.(Running one of these TNCs in KISS mode with a PC
would suspend their built-in beacon text transmissions.)
Note however that the "pileup" problem I noted in a response to a previous
ZL's post still applies. If a station at a single location sends several
different symbols alternately, they will wind up directly on top of each
other. Only the most recently sent one will be visible. (I often see
this here in Los Angeles where a home station "fights" with a car parked in
the driveway. In the daytime, when the car is at work, you see a
constant house. At night, you see House-Car-House-Car ... on the map.)
[ This wouldn't be a problem for my particular mapping undertaking since I
am filtering by digi symbol; other symbols at the same position would be
ignored.]
--
Stephen H. Smith wa8lmf (at) aol.com
EchoLink Node: 14400 [Think bottom of the 2M band]
Home Page: http://wa8lmf.com --OR-- http://wa8lmf.net
NEW! TNC Test CD
http://wa8lmf.net/TNCtest
JavAPRS Filter Port 14580 Guide
http://wa8lmf.net/aprs/JAVaprsFilters.htm
"APRS 101" Explanation of APRS Path Selection & Digipeating
http://wa8lmf.net/DigiPaths
Updated "Rev G" APRS http://wa8lmf.net/aprs
Symbols Set for UI-View,
UIpoint and APRSplus:
------------------------------
Message: 3
Date: Sat, 03 Mar 2007 07:37:47 +1100
From: Ray Wells <vk2tv_at_exemail.com.au>
Subject: Re: [aprssig] Re:All APRS Digipeaters In The World (Almost!) Mapped
On UIview
I endorsed Philip's suggestion for a symbol that would resemble the
contents of a Sardine tin (lots crammed in!).
At the one location I run ..
BBS (VK2TV)
Node (VK2TV-1)
Digi (VK2TV-10)
Igate (VK2TV-4)
UIView (VK2TV-5)
I didn't appear on Steven's map because DigiNed wasn't beaconing, I was
allowing Xastir to do that. However, I can see some sense in allowing
beacons from the digi. BTW, I'm the northern-most APRS station in VK2,
being some 300km south of the next station to the north of me, in VK4.
Ray vk2tv
------------------------------
Message: 4
Date: Fri, 2 Mar 2007 16:27:00 -0500
From: "Robert Bruninga" <bruninga_at_usna.edu>
Subject: RE: [aprssig] Re:All APRS Digipeaters In The World (Almost!) Mapped
On UIview
>>The problem is that there is no Multi Task symbol for the
>>station that does all 3 things Gateway / Node / Digi etc
>>Maybe a Multi Task symbol could be produced :-)
Igates send out an Igate status packet. Most clients including Uiview,
APRSdos and others use this to draw a special color circile around those
stations so you can tell the Igates no matter what symbol they are using.
TO resolve WX stations that have a high PHG range and also serve as
digipeaters, APRSdos had color attributes for all symbols.. Any symbol that
was a DIGI was painted GREEN, and a WX station was painted blue. SO a
GREEN WX symbol is a combined DIGI at a WX station. Or a DIGI symbol
surrounded by a BLUE circle was a DIGI that happened to send out a WX
packet. Problem is, many APRS clones left out symbol COLOR attributes
completely.
>>This is one place where a standalone KPC3+ or
>>UIdigi-equipped TNC2 has a real advantage over most
>>programs on a PC, since you can set three
>>different beacon texts, each with it's own repetition
>>rate, path and symbol.into these devices.
APRS discourages oscillating POSIT packets such as that. All of the LTexts
have always been receommended t be the same. The reason is that many
clients are set up to LOG all "new" or "changed" posits, but to not log
every copy of an unchanging posit. This GREATLY reduces log HISTORY files.
But if a TNC is beaconing two different position packets (even if it is
only becasuse the TEXT or symbol changes,), these are still changes and
result in exhorbitantly long LOG files due to these oscillating posits.
Therefore, having oscillating position rpeorts from the same station-SSID
are discouraged.
>>If a station at a single location sends several different
>>symbols alternately, they will wind up directly
>>on top of each other. Only the most recently sent
>>one will be visible.
Which is another reason why it is discouraged.
I recommend that CLIENT software that wants to resolve multi-use symbols,
should use the originally intended color atributes. Or at least draw a
different color circle around the symbol if multiple meanings are intended.
Such as the WHITE (or green) circle that both APRSdos and Uiview use around
any station symbol that sends out an Igate status packet. I wish Uiview
had used WHITE, so that it could use a GREEN circle around any symbol that
digipeats.
This does not need an APRS protocol change, but a local client-display fix
to resolve..
Bob
------------------------------
Message: 5
Date: Fri, 2 Mar 2007 14:28:47 -0700
From: "David Holm" <n7drh_at_hughes.net>
Subject: [aprssig] Kantronics KPC3
I am looking for a Ver. 8.2 ROM to replace a version 6. Can anyone help?
Thanks.
--Dave τΏτ¬ N7DRH
Microsoft products work great ... until you install them !
------------------------------
Message: 6
Date: Fri, 02 Mar 2007 21:37:39 +0000
From: rcluster_at_comcast.net
Subject: RE: [aprssig] Re:All APRS Digipeaters In The World (Almost!) Mapped
On UIview
UI-View draws a BLUE SQUARE around iGates that are sending out the iGate
packet.
73........Ron........AC7TK
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