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ZL3AI > APRDIG 12.04.03 11:07l 170 Lines 7476 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Apr 09, 2/2
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: RE: PCSAT in full ops mode.
From: Bob Bruninga <bruninga@usna.edu>
Date: Wed, 9 Apr 2003 12:06:54 -0400 (EDT)
X-Message-Number: 10
On Wed, 9 Apr 2003, Miller Scott Contr 30SCS/FTI wrote:
>Bob, is there a web page that describes the PCSAT command station network,
>or could you explain it to us here? Is it just a group of operators with
>control authority scattered around the globe with their own equipment, or
>are the stations interconnected to allow remote access?
A loose cooperation between some volunteers. After becoming confortable
with their capabilitities I gave them the control codes.
>My ground station is already configured to automatically determine when
>PCSAT is coming over the horizon, and it can change frequencies and
>reconfigure itself to act as a satgate. One of these days I hope to have a
>fully automated az/el tracking setup and all band/all mode capability. When
>that's in place, I'd be more than happy to allow controllers to access my
>station remotely. Is the amsat community doing this sort of thing yet?
>I've seen references to a distributed ground station network but I haven't
>been able to find any real info on it.
I, and many other satelite operators would love to have stations like
yours where we can simply access your TNC via the WEB and send commands
to our spacecraft. But writing that code is beyond me.
But what I would like to see is loggon password protection scheme that
protects the use of such a station, but then once past the LOGGON, then
I can get the command prompt via a TELNET connection....> >
bob
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Subject: RE: PCSAT in full ops mode.
From: Miller Scott Contr 30SCS/FTI <Scott.Miller@vandenberg.af.mil>
Date: Wed, 9 Apr 2003 16:35:13 -0000
X-Message-Number: 11
If you want to get really fancy, you could have a server track visibility
from each accessible ground station and automatically route commands to the
next available station. I don't know if there's any freeware out there that
does multiple ground stations and multiple satellites, but AGI's Satellite
Toolkit does a very impressive job of it if you've got the cash. Actually,
even the free base module might do it, but it wouldn't be as pretty.
It gets more complicated when you're dealing with multiple satellites having
varying priorities and comm requirements. My company actually makes a
spacecraft control network contact scheduler
(http://www.fti-net.com/ea/ps/sopsman.asp) that's in use by at least one
major network. I'm not involved with that group (I handle range scheduling
and planning systems here at Vandenberg) but maybe I could talk those guys
into making AMSAT a testbed for the application...
Anyway, the simplest way to do it wouldn't really require any special
software. When I want to work PCSAT from work, I use SSH to open a
triple-DES encrypted connection through my home firewall (OpenBSD), and
connect to the Alphastation that runs the IGATE station. From there I can
control the radio and the TNC. I suppose I could also tunnel the AX.25
connection through SSH if I needed to run a Windows client, but so far
Minicom suits my purposes just fine.
Scott
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Subject: Slightly OT: CelebrateLifeRun.com
From: "Gregg G. Wonderly" <gregg@skymaster.cytetech.com>
Date: Wed, 09 Apr 2003 17:08:59 -0500
X-Message-Number: 12
Martin Berkofsky, KC3RE started his Celebrate Life run today in Tulsa OK.
Martin will be running, 10 miles each day for 860 miles, to reach Arlington
Heights IL. Martin is an avid Radio Amateur Advanced class licensee, a world
renown pianist, and an all around great guy! I met Martin recently, and have
come to appreciate his warm heart, and his kind and gentle nature.
Martin would love to have the chance to meet many Radio Amateurs along the
way. People interested in running with him (about 3-4hours at his pace) each
day can watch his progress via findu (http://map.findu.com/kc3re-4), courtesy
of the tracker provided by AC5CV! If your club is along his path (see the web
site, or send me an email), and can perhaps provide some companionship and/or
spotting along the way, he'd appreciate the opportunity to meet more fellow
Radio Amateurs.
If you have local media contacts, and can get a story into the media about his
event, he will mention Amateur Radio many times. If you're club likes to
contest, or can setup a special event station for a weekend that coincides
with his pass through your area, he'd love a chance to do something like that
as well.
Finally, Martin, could use a place to sleep and cleanup at the end of the day.
If you or someone you know has a spare room, that would be great. If you
have a piano, I'd bet he'd play for you, and that would be a real treat.
If you have questions about how to help Martin, send me email, and I'll try to
get you in touch with him. Or, use the contact information on the
celebrateliferun.com web site.
-----
gregg@cytetech.com (Cyte Technologies Inc)
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Subject: RE: PCSAT in full ops mode.
From: "Joe Della Barba" <joe@dellabarba.com>
Date: Wed, 9 Apr 2003 20:46:07 -0400
X-Message-Number: 13
AFAIK AGWPE will let you do a "TNC over TCP/IP".
Is this what you mean? There are also serial port/TCP conversion packages
that might do the same thing.
Joe
73 de N3HGB
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Subject: RE: Another "APRS" like AVL solution or APRS on a Cell Phone...
From: "Darryl Smith" <Darryl@radio-active.net.au>
Date: Thu, 10 Apr 2003 10:47:07 +1000
X-Message-Number: 14
Well...
Allan Sadowski commented
>For those who keep their finger on the pulse of "APRS" like Commercial AVL
>systems....
>http://www.relm.com/pages/products/pdf/EarthLoc.PDF
Seems like I need to visit Melbourne, Fl and have a look at that
system... For one of my consulting projects I am about to but a number
of satellite modem based trackers from 80-20.com based in Washington
DC... I am still working on my client to send me to DC to spend some
time investigating the solution :-)
Anyway, Rich Parry commented about the WAPaprs... I have been developing
another solution. A company in the EU has developed a GPRS tracking unit
- uses SMS on cellphone or the GPRS data service, with the pricing of
A$0.001 cents per position report... I have a photo of the unit on
http://www.radio-active.net.au/web/tracking/gprs.html
What I have done is written a small server for this to turn the data
into APRS data so that I can then send the data through to my OziAPRS
application (APRS for OziExplorer). The OziExplorer which my software
plugs into has some of the most extensive mapping support of any product
that I know of in the consumer segment of the market... [The plug-in is
free at the moment for non-commercial users...]
http://www.radio-active.net.au/web/gpsaprs/oziaprs.html
The other thing that I am almost finished developing is what I am
calling the TeamTrack... Think GARMIN RINO for vehicles based on GPRS..
http://www.radio-active.net.au/web/tracking/teamtrak.html
Darryl
---------
Darryl Smith, VK2TDS POBox 169 Ingleburn NSW 2565 Australia
Mobile Number 0412 929 634 [+61 4 12 929 634 International]
Darryl@radio-active.net.au | www.radio-active.net.au
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