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PA2AGA > HDDIG 01.07.00 15:03l 210 Lines 7160 Bytes #-9415 (0) @ EU
BID : HD_2000_173O
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Subj: HamDigitalDigest 2000/173O
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From: PA2AGA@PI8HGL.#ZH1.NLD.EU
To : HDDIG@EU
Date: Sat, 01 Jul 00 01:50:42 MET
Message-Id: <hd_2000_173O>
From: pa2aga@pe1mvx.ampr.org
To: hd_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
* 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/CE, MacOS, Linux and Palm.
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. And
since GPS selective availability has been switched off for good, GPS
positions are now accurate to a few meters.
* 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
incoming messages alert the user on arrival and are held on the
message screen until killed.
* Bulletins and Announcements -- Bulletins and announcements are
addressed to everyone. Bulletins are sent a few times an hour for a
few hours, and announcements less frequently but possibly over a
few days.
* Fixed Station Tracking -- In addition to automatically tracking mobile
GPS/LORAN-equipped stations, APRS also tracks from manual reports or
grid squares.
* Objects -- Any user can place an APRS Object on his own map, and
within seconds that object appears on all other station displays. This
is particularly useful for tracking assets or people that are not
equipped with trackers. Only one packet operator needs to know where
things are (e.g. by monitoring voice traffic), and as he maintains the
positions and movements of assets on his screen, all other stations
running APRS will display the same information.
--------------------------------
Where to hear APRS transmissions
--------------------------------
One of the biggest attractions of APRS is that it only uses one
frequency to work on -- everyone shares it. In North America, this is
144.390 MHz. In the United Kingdom and several European countries it is
144.800 MHz.
---------------------------------
Where to find out more about APRS
---------------------------------
These web sites have a wealth of information on APRS, including
documentation and sources of software:
http://www.tapr.org
http://www.aprs.org
http://www.dididahdahdidit.com
http://www.packetradio.org.uk
http://www.netro.co.uk/aprs.htm
The full APRS Protocol Specification is at:
http://www.tapr.org/tapr/html/Faprswg.html
23 June 2000
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
73
Ian, G3NRW
Technical Editor, APRS Protocol Specification
--
+--------------------------------------------------------------------+
| APRS on 144.800 [IO91SX] ~55km/35 miles NNW of London |
| email: g3nrw@arrl.net |
| |
| APRS PROTOCOL SPEC: http://www.tapr.org/tapr/html/Faprswg.html |
| <APRSdec> APRS DECODER: http://www.netro.co.uk/aprs.htm |
+--------------------------------------------------------------------+
------------------------------
Date: Wed, 28 Jun 2000 11:14:47 GMT
From: Tony Schonfeld <tony@f5git.ampr.org>
Subject: Yam Modem Problem..
hello everybody,
I can running the yaminit software and my yam modem is found as well, but i
can't using yamser flexnet driver
without error message.
On another PC it' good, at home my computer is a Pentium Cyric PR200+
Any ideas ?
Many thnaks for comments
Tony
--
----------
Tony Schonfeld - F5GIT - Phone: 06 11 17 75 38
Email: tony@f5git.ampr.org WWW: http://www.f5git.ampr.org
------------------------------
Date: (null)
From: (null)
Of course CW is obsolet (all clever people know that for a long time)
but nothing will replace a "point to point" SSB QSO in case of worldwide
emergency because in some desertic locations on Earth, your digital
equipment has no chance to survive electronically.
One of the job of ham-radio operators is to maintain a VOICE network all
over the world. High speed digital QSOs have no REAL interest for hams.
For that they have (or will get soon) ADSL lines. For us, a TNC2 is
enough good.
73s de JM F1DFR
>
> Got questions? Get answers over the phone at Keen.com.
> Up to 100 minutes free!
> http://www.keen.com
>
>
Sent via Deja.com http://www.deja.com/
Before you buy.
------------------------------
End of Ham-Digital Digest V2000 #173
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