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ZL3AI > APRDIG 05.06.03 09:28l 336 Lines 12092 Bytes #999 (0) @ WW
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Subj: TAPR Digest, May 30, 3/5
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: APRS Client Longevity
From: "Curt Mills, WE7U" <hacker@tc.fluke.com>
Date: Fri, 30 May 2003 11:07:15 -0700 (PDT)
X-Message-Number: 19
On Thu, 29 May 2003, John W. (Bill) Hays wrote:
>On Wednesday, May 28, 2003, at 10:11 PM, Miller Scott Contr 30SCS/FTI
>wrote:
>
>><SNIP>
>>Mailing a zillion disks a la AOL might not be practical, but you could
>>have
>>clubs download an ISO image and burn copies to distribute to all of
>>their
>>members.
>>
>>Scott
>>N1VG
>>
>Now that's a "cool" idea!
I agree. Just takes somebody with the time to create it. It sure
would be a good emergency resource, where you absolutely have to get
something up and running in a hurry.
Pop in the CD & reboot, configure callsign and an interface or two,
and you're on the air.
Could also save user settings to a floppy, so with a floppy and a CD
you'd be up and running quicker.
--
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: Coverage Map
From: James Smith <k9apr@sbcglobal.net>
Date: Fri, 30 May 2003 13:15:34 -0500
X-Message-Number: 20
What program is needed in making a coverage area map of a Digipeater
and/or Repeater?
--
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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Subject: WoW!!!
From: T C <boytroy54@yahoo.com>
Date: Fri, 30 May 2003 11:21:05 -0700 (PDT)
X-Message-Number: 21
Thank you guys for the info...
Now I can see if there is something I can do with that data.
I appreciate the information. It looks very confusing, and it shows the
level of intelligence it takes to be a programmer of the programs that use
this data.
Thank you again...
73 de w8tcc, troy
----------------------------------------------------------------------
Subject: Coverage Mapping
From: "Pat Barthelow" <aa6eg@hotmail.com>
Date: Fri, 30 May 2003 12:10:53 -0700
X-Message-Number: 22
For the group:
Here is a source for and examples of, Line of Sight mapping software,
using Linux
Also, apparently, if you search google with: radio-mobile you can find
some Windows based software.
73, de Pat AA6EG aa6eg@hotmail.com
Subject: [charlie] Mapping repeater coverage area
Date: Thu, 17 Apr 2003 23:50:22 -0700
From: Johnathan Corgan <jcorgan@aeinet.com>
Reply-To: charlie@txt.com
Organization: Atlas Enterprises
To: Charlie Repeater Group <charlie@txt.com>
CC: Mark Cottrell <mark@cottrell.net>, WVARA Chat <chat@wvara.org>
Inspired by a question from Mark Cottrell, KF6TTB, regarding topo-mapping
of repeater coverage areas, I discovered a wonderful program on the net for
doing exactly that. Based on public domain information databases from the
USGS and Census Bureau, it is able to compute and plot line-of-sight
coverage from a given location and antenna height, taking into account both
the geographical terrain and the earth's curvature. While the output isn't
nearly as sexy as the Topo USA 3D renderings I put up earlier, it is very
enlightening to observe just what can and can't be seen by an antenna. Of
course, refraction, diffraction, and other VHF/UHF propogation modes extend
repeater coverage far beyond line of sight, yet LOS can be considered
"reliable" coverage area.
The program itself was written by KD2BD, and is available for Linux and
UNIX workstations under a free, open-source license:
http://www.qsl.net/kd2bd/splat.html
It can also do point-to-point terrain profiles and required antenna height
calculations, among other interesting chores.
I've generated and uploaded to my website a few example output files. These
are rather large (2400x2400 pixel or more, 1-2 MB in size) grayscale relief
images, with LOS coverage area in green.
The first is the LOS coverage from my QTH in Almaden Valley, with an
antenna 45 ft. above ground and to receivers at least 6 feet above ground.
I'm blocked to the south and west by the Santa Cruz mountain range, to the
east by the Santa Teresa hills, and a little pimple of a hill (~200 ft)
directly to the north that blocks most of San Jose. Yet, this is what my
2m/440 vertical can "see":
http://www.aeinet.com/charlie/ae6ho-los.png
Now, move north out of the valley only about two miles, to the QTH of Mike,
K6MKF. He's on the other side of that pimple, which now blocks him to the
south but gives him a much better LOS to pretty much everywhere else:
http://www.aeinet.com/charlie/k6mkf-los.png
What does a "real" repeater site look like? Just to the south of my QTH is
Mt. Umunhum, at 3500 ft., hosting the famous "blockhouse" former Air Force
WWII radar, a million commercial (and some amateur) communications
antennas, and a NOAA weather radar (really big file):
http://www.aeinet.com/charlie/umunhum-los.png
I guess if you live at the top of Mt. Umunhum you've got a real pretty view
of just about everything.
I don't have confirmed coordinates or antenna heights of the WA6TEM or
W6PIY repeaters. If the trustees want to send me that info (and I'll keep
it private if you wish), I'll make up the same type LOS images for our
favorite SJ repeaters.
Also, it takes me about 30 seconds to generate one of these, so if anyone
is interested in sending me their antenna height and lat/long coordinates
of their QTH (GPS accuracy would be best, but you can get an address
converted to lat/lon at www.geocode.com), I can put up a file the
webserver as well.
(Boy I'll feel dumb if this is old news and and I'm just way behind the
times :-)
73 de Johnathan, AE6HO
----------------------------------------------------------------------
Subject: Email from a D700
From: "Bruce Martin, KQ4TV" <aprssig@almostanywhere.com>
Date: Fri, 30 May 2003 14:24:28 -0500
X-Message-Number: 23
Is it still possible to send email via a D700 message. I tried it today but
it doesn't seem to work. I know it hit an igate (xastir) on the first hop.
--
Bruce W. Martin, KQ4TV
116 Beechwood Dr.
Burns, TN 37029
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Subject: RE: fourth.aprs.net information....
From: "Dave Anderson" <dandersn@citicom.com>
Date: Fri, 30 May 2003 15:30:45 -0400
X-Message-Number: 24
I had no idea you wanted me to continue to promote your domain name, Mark.
I had that name listed on my site just until the other day, only to avoid
confusion with users looking it up.
I never had intentions of promoting the use of the aprseast domain. If that
was something you wanted me to do, you needed to let me know when you talked
to me. I certainly can't read minds.
Your -only- intention that was conveyed to me when we talked on the phone
was that you did not want your users to be just turned off. That is
something I have, and will continue to provide for those folks.
Seeya,
Dave
>-----Original Message-----
>From: na4v@cox.net [mailto:na4v@cox.net]
>Sent: Friday, May 30, 2003 2:53 PM
>To: Dave Anderson
>Subject: Re: [aprssig] fourth.aprs.net information....
>
>
>I'm somewhat disappointed that you have dropped all
>references to APRSEast...that was never my intention when I
>approach you about the move...all my time and energy
>promoting that server over the last year or so up in smoke....sheesh
----------------------------------------------------------------------
Subject: callsign server
From: "chris schwab" <1schwab1@tampabay.rr.com>
Date: Fri, 30 May 2003 15:43:26 -0400
X-Message-Number: 25
All:
Does anyone know if the APRS callsign server is still up & operational?
If not, does anyone remember who ran it? I'd like to contact them & ask them
a few questions.
73!
Chris N4BSA
----------------------------------------------------------------------
Subject: Coverage Mapping; Software Sourcing
From: "Pat Barthelow" <aa6eg@hotmail.com>
Date: Fri, 30 May 2003 13:11:06 -0700
X-Message-Number: 26
Folks,
from my previous post on coverage mapping software (below); Please
understand that I do not have the software myself. (I cant make plots for
you) I posted a location for it's download, and some example finished plots.
For the group:
Here is a source for and examples of, Line of Sight mapping software, using
Linux
Also, apparently, if you search google with: radio-mobile you can find
some Windows based software.
73, de Pat AA6EG aa6eg@hotmail.com
Inspired by a question from Mark Cottrell, KF6TTB, regarding
topo-mapping of repeater coverage areas, I discovered a wonderful
program on the net for doing exactly that. Based on public domain
information databases from the USGS and Census Bureau, it is able to
compute and plot line-of-sight coverage from a given location and
antenna height, taking into account both the geographical terrain
and the earth's curvature. While the output isn't nearly as sexy as the
Topo USA 3D renderings I put up earlier, it is very enlightening to
observe just what can and can't be seen by an antenna. Of course,
refraction, diffraction, and other VHF/UHF propogation modes extend
repeater coverage far beyond line of sight, yet LOS can be
considered "reliable" coverage area.
The program itself was written by KD2BD, and is available for Linux
and UNIX workstations under a free, open-source license:
http://www.qsl.net/kd2bd/splat.html
It can also do point-to-point terrain profiles and required antenna
height calculations, among other interesting chores.
I've generated and uploaded to my website a few example output
files. These are rather large (2400x2400 pixel or more, 1-2 MB in size)
grayscale relief images, with LOS coverage area in green.
The first is the LOS coverage from my QTH in Almaden Valley, with an
antenna 45 ft. above ground and to receivers at least 6 feet above
ground. I'm blocked to the south and west by the Santa Cruz
mountain range, to the east by the Santa Teresa hills, and a little pimple
of
a hill (~200 ft) directly to the north that blocks most of San Jose.
Yet, this is what my 2m/440 vertical can "see":
http://www.aeinet.com/charlie/ae6ho-los.png
Now, move north out of the valley only about two miles, to the QTH
of Mike, K6MKF. He's on the other side of that pimple, which now
blocks him to the south but gives him a much better LOS to pretty much
everywhere else:
http://www.aeinet.com/charlie/k6mkf-los.png
What does a "real" repeater site look like? Just to the south of my
QTH is Mt. Umunhum, at 3500 ft., hosting the famous "blockhouse" former
Air Force WWII radar, a million commercial (and some amateur)
communications antennas, and a NOAA weather radar (really big file):
http://www.aeinet.com/charlie/umunhum-los.png
I guess if you live at the top of Mt. Umunhum you've got a real
pretty view of just about everything.
I don't have confirmed coordinates or antenna heights of the WA6TEM
or W6PIY repeaters. If the trustees want to send me that info (and
I'll keep it private if you wish), I'll make up the same type LOS images
for our favorite SJ repeaters.
Also, it takes me about 30 seconds to generate one of these, so if
anyone is interested in sending me their antenna height and lat/long
coordinates of their QTH (GPS accuracy would be best, but you can
get an address converted to lat/lon at www.geocode.com), I can put up a
file the webserver as well.
(Boy I'll feel dumb if this is old news and and I'm just way behind
the times :-)
73 de Johnathan, AE6HO
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