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PA2AGA > HDDIG 24.07.00 02:46l 204 Lines 7433 Bytes #-9305 (0) @ EU
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From: PA2AGA@PI8HGL.#ZH1.NLD.EU
To : HDDIG@EU
Date: Sat, 22 Jul 00 14:54:28 MET
Message-Id: <hd_2000_196A>
From: pa2aga@pe1mvx.ampr.org
To: hd_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
Ham-Digital Digest Fri, 21 Jul 2000 Volume 2000 : Issue 196
Today's Topics:
APRS Software (2 msgs)
Getting back into packet -- need info please (5 msgs)
Help with PSK-31 (2 msgs)
MTX-800 Value
PSK31 Program
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Loop-Detect: Ham-Digital:2000/196
----------------------------------------------------------------------
Date: 20 Jul 2000 22:04:14 GMT
From: johnl84238@aol.com (JOHNL84238)
Subject: APRS Software
Do you have a link for downloading the APRS software you are talking about???
Thanks,
John
------------------------------
Date: Thu, 20 Jul 2000 18:35:46 -0700
From: PreCool <precoolNOprSPAM@email.com.invalid>
Subject: APRS Software
http://www.tapr.org/tapr/html/Faprswg.html
-----------------------------------------------------------
Got questions? Get answers over the phone at Keen.com.
Up to 100 minutes free!
http://www.keen.com
------------------------------
Date: Thu, 20 Jul 2000 08:27:53 -0400
From: "Joseph R. Skoler" <joseph@compuhelp.com>
Subject: Getting back into packet -- need info please
Well, looks like it's a consensus: Packet did not bloom into the wonderful
thing I had hoped it would.
Thanks everyone for the feedback.
<no.spam@no.junk.mail.net> wrote in message
news:vlndnsgr5b46h2tighid4ark9at3q3n8mf@4ax.com...
> On Wed, 19 Jul 2000 08:22:21 -0400, "Joseph R. Skoler"
<joseph@compuhelp.com>
> wrote:
>
> >Hi,
> >
> >I dropped out of packet radio in the late 1980's, and have been thinking
> >about getting up and running again.
> >
> >>>>>>>>>>>>CLIP<<<<<<<<<<<
> >Thanks very much for your help,
> >Joseph R. Skoler, kc2yu
> >joseph@compuhelp.com
> >
> While you were gone, it died.
------------------------------
Date: Thu, 20 Jul 2000 14:09:31 +0100
From: Ian Wade <Ian.Wade@care4free.net>
Subject: Getting back into packet -- need info please
In article <8l6qkr$cqs$1@news.panix.com>, Joseph R. Skoler
<joseph@compuhelp.com> writes
>
>Well, looks like it's a consensus: Packet did not bloom into the wonderful
>thing I had hoped it would.
>
.... except in one respect: APRS (Automatic Position Reporting System).
APRS is very much alive and well. Here's a brief summary:
====================
INTRODUCTION TO APRS
====================
-------------
What is APRS?
-------------
APRS is short for Automatic Position Reporting System, which was
introduced by Bob Bruninga, WB4APR, at the 1992 TAPR/ARRL Digital
Communications Conference. Fundamentally, APRS is a packet
communications protocol for disseminating live data to everyone on a
network in real time. Its most visual feature is the combination of
packet radio with the Global Positioning System (GPS) satellite network,
enabling radio amateurs to automatically display the positions of radio
stations and other objects on maps on a PC. Other features not directly
related to position reporting are supported, such as weather station
reporting, direction finding and messaging.
APRS is different from regular packet in several ways:
* It provides maps and other data displays, for vehicle/personnel
location and weather reporting in real time.
* It performs all communications using a one-to-many protocol, so that
everyone is updated immediately.
* It uses generic digipeating, with well-known callsign aliases, so that
prior knowledge of network topology is not required.
* It supports intelligent digipeating, with callsign substitution to
reduce network flooding.
* Using AX.25 UI-frames, it supports two-way messaging and distribution
of bulletins and announcements, leading to fast dissemination of text
information.
* It supports communications with the Kenwood TH-D7 and TM-D700 radios,
which have built-in TNC and APRS firmware.
Conventional packet radio is really only useful for passing bulk message
traffic from point to point, and has traditionally been difficult to
apply to real-time events where information has a very short lifetime.
APRS turns packet radio into a real-time tactical communications and
display system for emergencies and public service applications.
APRS provides universal connectivity to all stations, but avoids the
complexity, time delays and limitations of a connected network. It
permits any number of stations to exchange data just like voice users
would on a voice net. Any station that has information to contribute
simply sends it, and all stations receive it and log it.
APRS recognizes that one of the greatest real-time needs at any special
event or emergency is the tracking of key assets. Where is the marathon
leader? Where are the emergency vehicles? What's the weather at
various points in the county? Where are the power lines down? Where is
the head of the parade? Where is the mobile ATV camera? Where is the
storm?
To address these questions, APRS provides a fully featured automatic
vehicle location and status reporting system. It can be used over any
two-way radio system including amateur radio, marine band, and cellular
phone. There is even an international live APRS tracking network on the
Internet.
-------------
APRS Features
-------------
APRS runs on most platforms, including DOS, Windows 3.x, Windows 95/98/
2000/NT, MacOS, Linux and Palm. A new version for WinCE is due for
release soon.
Most implementations on these platforms support the main features of
APRS:
* Maps -- APRS station positions can be plotted in real-time on maps,
with coverage from a few hundred yards to worldwide. Stations
reporting a course and speed are dead-reckoned to their present
position. Overlay databases of the locations of APRS digipeaters, US
National Weather Service sites and even amateur radio stores are
available. It is possible to zoom in to any point on the globe.
* Weather Station Reporting -- APRS supports the automatic display of
remote weather station information on the screen.
* DX Cluster Reporting -- APRS an ideal tool for the DX cluster user.
Not only is it possible to see all DX spots on the map, but by
operating in the monitor-only mode, the overall packet load on the
DX cluster is reduced. This is a benefit to everyone on the channel.
* Internet Access -- The Internet can be used transparently to cross-
link local radio nets anywhere on the globe. It is possible to telnet
into Internet APRS servers and see hundreds of stations from all over
the world live. Everyone connected can feed their locally heard
packets into the APRS server system and everyone everywhere can see
them.
* Messages -- Messages are two-way messages with acknowledgement. All
To be continued in digest: hd_2000_196B
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