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ZL3AI > APRDIG 08.07.06 07:41l 189 Lines 6954 Bytes #999 (0) @ WW
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To : APRDIG@WW
Message: 20
Date: Thu, 6 Jul 2006 09:21:35 +0100
From: John Ronan <jronan_at_tssg.org>
Subject: Re: [aprssig] Re: APRS Video Podcast Distribution Challenge
Someone (I forget who) asked about a bittorrent being made available.
I played for a few mins this morning with a basic tracker
http://193.1.193.154:8000/
and these are the two.torrents for the two files. Currently the tracker is
also the serving machine. I'll see if I can get another peer online in a
few minutes.
Regards
John
--
John Ronan <jronan_at_tssg.org>, +353-51-302938
Telecommunications Software & Systems Group, http://www.tssg.org
------------------------------
Message: 21
Date: Thu, 6 Jul 2006 22:58:48 +1000
From: "Andrew Rich" <vk4tec_at_tech-software.net>
Subject: [aprssig] RE: [OZAPRS] Telemetry Monitoring
Has anyone ever written a telem program that is configurable to show graphs
and "lights" from the aprs telem data ?
Like a stand alone VB program
Andrew Rich
Amateur radio callsign VK4TEC
email: vk4tec_at_tech-software.net <mailto:vk4tec_at_tech-software.net>
web: http://www.tech-software.net
Brisbane AUSTRALIA
-----Original Message-----
>From: Robert Bruninga [mailto:bruninga_at_usna.edu]
>
>>APRS Victoria has several Digipeater Sites monitored with SiteAlert (SA).
>>This provides alarms and telemetry information on the health of the
>>digipeater and the site....Telemetry is stored and graphed in real time:
>>http://www.vk3.aprs.net.au/digi_site_graphs.htm
>
>This is an excellent demonstration of the power of telemetry on
>APRS. Because of the standard APRS format for telemetry,
>this enables sites like the VK3 site above and FINDU to have
>general purpose graphing and display code that will work witih
>anyone that transmits telemetry.
>
>Since telemetry is built-in to the KPC-3+ TNC's, this is a powerful
>system at the fingertips of most APRS operators. FOr example,
>we use this telemetry for all of the PCSAT2 telemetry:
>http://www.findu.com/cgi-bin/pcsat-tele2.cgi
>
>and for our prototype APRS ocean buoys:
>http://www.findu.com/cgi-bin/tele2.cgi?call=usna-1
>
>All we have to do is transmit it in the APRS standard format, and
>then call up the FINDU URL and see it nicely displayed... from
>anywehre on the planet!
>
>de Wb4APR, Bob
------------------------------
Message: 22
Date: Thu, 06 Jul 2006 10:04:12 -0400
From: "Robert Bruninga" <bruninga_at_usna.edu>
Subject: [aprssig] Using APRS via the AO-51 digipeater
AMSAT has enabled the 9600 baud APRS digipeater on the AO-51 satellite.
Any APRS mobile (with 9600 baud such as a D7 or D700) can easily hit the
uplink. But what we need are lots of SATGates to monitor the downlink
since it is so weak. So any APRS IGate stations that have a 9600 baud TNC
can be very helpful... see below....
The AO-51 Digipeater operates on 145.86 uplink and 435.150 +/- Doppler
downlink (9600 baud) but has some very unique charasteristics that are
different from normal digipeater expectations.
Since this is a 9600 baud digipeater only, the most probable users will be
owners of the TH-D7 and TM-D700 APRS radios with built in 9600 baud APRS
TNC's. What is different about the AO-51 digipeater compared to ARISS or
the PCSAT's is:
1) The downlink is weak and will need a beam to receive and you must tune
doppler
2) The uplink is easy to hit even with the 5 watt HT to an omni antenna.
3) The digipeater is full duplex and the TNC in the D7/D700 is only half
duplex. THus the SENDER of a packet will usually NOT see his own packet
digipeated unless he is using two radios.
Because of these unique features there are two primary user modes that can
still be efficiently used on this space system:
a) two-way APRS message QSO's with stations using a decent downlink antenna
b) Station uplinks of position, status, or messages or email into the
global APRS system from remote locations for receipt and viewing on the
internet.
To make #b work, requires several AO-51 9600 baud packet satellite gateways
operating around the world and feeding their live downlink into the global
APRS internet system. The rest of this email will address how to uplink
through this application. Here is what the sender should do:
1) Use a UNIQUE callsign-SSID for this experiment so that the data is not
overwritten when you then later operate terrestrially
2) Use the uplink path VIA PACB-1 at 9600 baud
3) Set your position rate to about once a minute during the pass.
4) Enter a CQ message into the radio with a TOCALL of ALL
5) Check http://map.findu.com/mycall* to see if you made it.
Anyone can be a SATGATE feeding into the global APRS internet
infrastructure simply by QSY'ing their normal APRS IGate from the APRS
channel to 435.15 +/- Dopplerand changing to 9600 baud on their TNC for the
duration of a pass.
Although a beam is needed to bring in the weak signal for one SATgate, this
system is unique in that the APRS internet system combines the output of
ALL SATgates and so only one station at a time really needs to hear each
packet. THus, if we had as many as 6 SATgates across the USA in the north
and south, they would only need a SIMPLE 19" 3/4 wave vertical receive
antenna (no moving parts) and they would not have to tune DOppler either,
since they would only receive well for the few minutes the satelltie was
overhead. Thus, these 435.15 fixed tuned and fixed OMNI SATgates could
provide continuous coeverage over the USA if there were enough of them.
If you have a spare 9600 baud TNC and UHF receiver to dedicate to this
mission, it would really serve a great service. The 19" whip over a ground
plane does have almost 8 dBi gain above 30 degrees and so it CAN hear the
dowlink in the middle of a high elevation pass.
Anyway, hope that helps.
de Wb4APR, Bob
------------------------------
Message: 23
Date: Thu, 6 Jul 2006 09:47:18 -0500
From: "John Habbinga" <kc5zrq_at_gmail.com>
Subject: Re: [aprssig] Re: APRS Video Podcast Distribution Challenge
I put the files on my host's server, but they wouldn't get served. Perhaps
my host restricts torrent files. So I uploaded them to Mininova and put a
link to them on the archives page. I tried them and they download just as
fast as the http links. http://www.aprstv.com/archives.htm#ep001
On 7/6/06, John Ronan <jronan_at_tssg.org> wrote:
>Someone (I forget who) asked about a bittorrent being made available.
>
>I played for a few mins this morning with a basic tracker http://
>193.1.193.154:8000/
>
>and these are the two.torrents for the two files. Currently the
>tracker is also the serving machine. I'll see if I can get another
>peer online in a few minutes.
>
>Regards
>John
--
John Habbinga, KC5ZRQ
Lubbock, Texas
http://find-you.com/cgi-bin/find.cgi?call=KC5ZRQ*
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