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ZL3AI > APRDIG 21.07.03 09:16l 266 Lines 9247 Bytes #999 (0) @ WW
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: Photo of where many APRS stations like to live...
From: Bob Bruninga <bruninga@usna.edu>
Date: Fri, 18 Jul 2003 14:52:25 -0400 (EDT)
X-Message-Number: 13
On Fri, 18 Jul 2003, Darryl Smith wrote:
>Here is a photo of 0 lat, 0 long, a place where many APRS stations like to
>visit when they do not have GPS lock... Enjoy
Just for info...
That is an error of the client software. A LAT/LONG of 0/0 is defined in
APRS as a null position and is invalid. THus, stations should not be
plotted that are transmitting a null position..
Bob
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Subject: Re: IGATES
From: "Curt Mills, WE7U" <hacker@tc.fluke.com>
Date: Fri, 18 Jul 2003 11:53:15 -0700 (PDT)
X-Message-Number: 14
On Thu, 17 Jul 2003 wes@johnston.net wrote:
>I remember reading a long time ago that Bob Bruninga wanted advanced routing
>for aprs packets which would take a packet from me to a particular city. It
>just dawned on me we have that now... we just need a *small* tweak to the IGATE
>software (Winaprs, APRSS-A and UI-View)...
>
>We assign each igate an alias and make it gate any packet which has it's name
>in the path out to 2m.
I responded to a similar message on an Xastir mailing list. Wanted
to post a blurb or two here as well:
I see some very good uses for this, but I also see the possibility
for abuse, whether intentional or accidental. Over time, lots of
stations could end up leaving these airport designators in their
posits. Out-of-town traffic on local RF would increase, and the
only way to reduce it would be to disable this option at the igate
(heavy-handed approach), or to e-mail and/or message each remote
operator to ask them to take it out of their path.
Also, the remote operator doesn't have any feedback as to the level
of channel activity on remote RF, so the igates would need some
throttling mechanism in order to keep things flowing.
The standard auto-route messaging system should probably bypass this
throttling code so that critical messages could always get through.
As far as intentional abuse, someone could send a lot of packets in
a particular direction in order to slow down or kill local RF in a
particular area.
Anyone have good solutions for these types of problems? I think the
initial idea has a lot of merit. It allows more dynamic routing
than we have currently, very useful for keeping track of friends on
trips.
--
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: Photo of where many APRS stations like to live...
From: Gerry Creager <gerry.creager@tamu.edu>
Date: Fri, 18 Jul 2003 14:04:33 -0500
X-Message-Number: 15
So: What happens when you arrive at 360/360?
Bob Bruninga wrote:
>On Fri, 18 Jul 2003, Darryl Smith wrote:
>
>>Here is a photo of 0 lat, 0 long, a place where many APRS stations like to
>>visit when they do not have GPS lock... Enjoy
>
>Just for info...
>That is an error of the client software. A LAT/LONG of 0/0 is defined in
>APRS as a null position and is invalid. THus, stations should not be
>plotted that are transmitting a null position..
>
>Bob
--
Gerry Creager -- gerry.creager@tamu.edu
Network Engineering -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.458.4020
FAX: 979.847.8578 Pager: 979.228.0173
Office: 903A Eller Bldg, TAMU, College Station, TX 77843
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Subject: RE: WinAPRS and Precision Maps
From: "Cap Pennell" <cap@cruzio.com>
Date: Fri, 18 Jul 2003 12:35:58 -0700
X-Message-Number: 16
Roger, get a copy of WinAPRS 2.5.1 (from ftp.tapr.org) for use with
PM3.0/3.5. PM3 _can_ be made to work with 2.6.1 but it's a real kludge.
Easier all around to use WinAPRS 2.5.1 for that version of Precision Mapping
Streets.
Hope this helps.
73, Cap KE6AFE
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Subject: Re: PCsat
From: Bob Bruninga <bruninga@usna.edu>
Date: Fri, 18 Jul 2003 15:35:48 -0400 (EDT)
X-Message-Number: 17
On Fri, 18 Jul 2003, John Mullen wrote:
>... when will PCsat be fully operational again..I did see the 17th to
>31st of July.
I have hesitated to make a post, but we are having problems. She is so
weak that we cannot get logged on, tho several command stations are
trying. We hope that the batteries may improve. Stephen <w4epi> copies
one telemetry packet showing the batteries have warmed up as they should
in the sun, but still no joy connecting.
We ask everyone to ONLY use the path via PCSAT-1 which will be the working
callsign AFTER we configure PCsat for normal operations. So if you use
that path it will work when ready. But prior to then, you will not be
using precious power and preventing the command stations from getting
logged on...
thanks
Bob
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Subject: APRS IP address
From: Bob Bruninga <bruninga@usna.edu>
Date: Fri, 18 Jul 2003 15:56:29 -0400 (EDT)
X-Message-Number: 18
When we get around to an 802.11 APRS network, do we need to be thinking
about IP planning? Pat, N8PK went to the ARRL web to check and found ...
http://www.arrl.org/tis/info/tcpip.html
Of interest:
o 44.096.xxx.xxx is for D.C. under Richard Cramer, N4YDP, in NoVA.
o 44.062.192.xxx is for northern VA under Russ Garber, K4ZIV.
o 44.060.xxx.xxx is for Maryland under (no coordinator listed).
o 44.193.xxx.xxx is for "space" under AMSAT and Tom Clark, W3IWI.
Is APRS thinking of how we can use 802.11 for APRS on a large scale or a
small scale?
Bob
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Subject: Re: Photo of where many APRS stations like to live...
From: Bob Bruninga <bruninga@usna.edu>
Date: Fri, 18 Jul 2003 16:23:06 -0400 (EDT)
X-Message-Number: 19
On Fri, 18 Jul 2003, Gerry Creager wrote:
>So: What happens when you arrive at 360/360?
There is actually another "definition" in the APRS protocol and that is
that NORTH is 360 and a direction of 0 is a null or unknown direction.
This is in the COURSE/SPEED field. A COURSE/SPEED of 000/000 is a null
report. Not zero speed North...
for what its worth...
Bob
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Subject: Re: Photo of where many APRS stations like to live...
From: Bob Bruninga <bruninga@usna.edu>
Date: Fri, 18 Jul 2003 16:23:47 -0400 (EDT)
X-Message-Number: 20
On Fri, 18 Jul 2003, Gerry Creager wrote:
>So: What happens when you arrive at 360/360?
Some people think I already have. But its dark in here...
Bob
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Subject: Re: APRS IP address
From: Bill Vodall - WA7NWP <wa7nwp@jnos.org>
Date: Fri, 18 Jul 2003 13:38:16 -0700 (PDT)
X-Message-Number: 21
>When we get around to an 802.11 APRS network, do we need to be thinking
>about IP planning? Pat, N8PK went to the ARRL web to check and found ...
>http://www.arrl.org/tis/info/tcpip.html
>
>Of interest:
>
>o44.193.xxx.xxx is for "space" under AMSAT and Tom Clark, W3IWI.
>
>Is APRS thinking of how we can use 802.11 for APRS on a large scale or a
>small scale?
>
>Bob
The 44 Net, aka Ampr.org -- see http://www.ampr.org -- has essentially
nothing to do with 802.11 networking. (That may or may not be a good
thing...) It's TCP/IP on Amateur radio which can any sort of RF scheme
be it Wi-Fi or 1200 through 56,000 baud packet.
On the small scale, 802.11 works incredible for bringing the Internet
to a group of individuals in a limited area, up to hundreds of
feet.
Last Wednesday, at our monthly group (http://www.wetnet.net) meeting, one
member had an Internet feed shared through a MiniItx computer server to an
Access Point and six folks were on line. In addition to the normal boring
activities like web browsing and reading email, several APRS applications
were running and I got over 12 MB into an Cygwin install (for Xastir of
course) on the laptop of a friend who carelessly lent me access to the
keyboard...
On the large scale, it's been intriguing to think of converting the
entire APRS-IS feed to UDP (unconnected) packets and broadcasting them
via Wi-Fi. While 802.11 suffers from the same issues as APRS and
legacy packet when it comes to high area nodes, this "broadcasting"
from a super location should be workable as a Firenet and/or APRS feed.
73,
Bill - WA7NWP
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Subject: What GPS for APRS?
From: "Dave Sloan" <desloan@earthlink.net>
Date: Fri, 18 Jul 2003 15:12:52 -0600
X-Message-Number: 23
My Garmin 45XL just bit the dust. What is the most popular GPS for APRS? New
or used it doesn't matter. Although I would rather not have to spend too
much.
Tnx & 73,
Dave N0EOP
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