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AUTOMATIC PACKET REPORTING SYSTEM


It is with great sadness we must announce the one-of-a-kind Amateur Radio
Operator Bob Bruninga WB4APR has become a Silent Key. Few people have
contributed more to ham radio. For now, aprs.org is under the control of Steve,
K4HG. Discussion of what to do with it is on the TAPR aprs sig . Please join and
participate. Errata can be sent to steve at dimse dot com

Other personal links (Not related to APRS): On Electric Vehicles and Solar
Power, or my Energy Choices book.

APRS is now in its 25st year! APRS is digital communications information channel
for Ham radio. As a single national channel (see map at right), it gives the
mobile ham a place to monitor for 10 to 30 minutes in any area, at any time to
capture what is happening in ham radio in the surrounding area. Announcements,
Bulletins, Messages, Alerts, Weather, and of course a map of all this activity
including objects, frequencies, satellites, nets, meetings, Hamfests, etc. The
APRS network has grown to most countries with strong Amateur Radio populations.

Download: . . APRS/Energy Talk at Superfest in Peoria, ILL Sept 2015
. . . . . . . . . . . . APRStt Satellite QIKCOM-2, presented in Utah, Aug 2015
. . . . . . . . . . . . APRS-by-Bob Powerpoint (8 Mb) (Feb 2015 version).
. . . . . . . . . . . . Dayton 2015 Talk

This page evolves over time. New stuff is posted here at the top. Older stuff
migrates downward. To see the full description of APRS you have to drill
downward pretty far. But it is there back to the beginning (1992).



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Is it your radio? Since packet begain in 1978 too many people use it as a
plug-N-play mode where you just connect your TNC to the radio and begin
operating. Sure, it probably "works" on some strong signals, but could be
suffering 10 to 40 dB of performance loss on weaker signals you might never
notice (you dont see what you dont see)... Here is the best explanation I have
seen by John Ackermann, N8UR. Some estimate that 90% of signals on the air are
"bad" in that they were never adjusted for optimum settings of level, deviation,
preemphasis, tone skew, deemphasis, balance, and impedance, etc. Fix it (usually
at the transmitter) if you want to be seen.

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APRS Operations Tip: There are several different ways to optimize your APRS
mobile operations depending on the immediate situation. One way to rapidly
select between them without having to go through menu's is to simply program
several radio channels with the different settings. The beauty of these channel
suggestions is that you can always leave the speaker volume turned up on the
APRS data band and can move between full audio monitoring, to Voice Alert, or to
complete silence simply by changing channels. For the Voice Alert to always be
functional and not miss a call, operators should never have their APRS band
volume turned down. Instead, they can silence the speaker in the presence of
lots of voice alert stations by selecting the APRSmute channel. By the way, here
is a chart of APRS on 30 meters.

RECENT INITIATIVES:



List of other APRS clients.. AMTRAK Trackin Chicago to Washington SMSGTE is an
SMS/APRS gateway that allows two way messaging between APRS users and
cellphones. Our recent Balloon launches. Use APRS to support your Hamfest! to
advertise, inform and locate APRS Mobile presentation(.ppt) on how to best use
your mobile. Also see Settings for the D700! and (for the D710). Learn how to
operate Voice Alert so you can be contacted while mobile Check your local Digi
to make sure it is current with the New-N Paradigm Ideas for the ultimate digi.



Be Prepared for Dayton Travels and enjoy the APRS mobile experience. Building
map, Flea market East, Flea market West Learn about APRStt and involve everyone
with a DTMF HT in your club, not just APRS owners Learn about APRS-RFID and see
if you have an application for it in your club



Our Annual Golden Packet Event combines with Scouting's Operation ON-Target
Saturday 21 July 2012 1100 to 1400 local time. Prepare a SET Plan for your next
Simulated Emergency test See the APRS SET Message web page.

APRS is not a vehicle tracking system. It is a two-way tactical real-time
digital communications system between all assets in a network sharing
information about everything going on in the local area. On ham radio, this
means if something is happening now, or there is information that could be
valuable to you, then it should show up on your APRS radio in your mobile. See
typical oversights and hear my talk on the 3 Oct 08 Rain Report See also some
original APRSdos views and concepts overlooked in some new programs.

APRS also supports global callsign-to-callsign messaging, bulletins, objects
email and Voice because every local area is seen by the Internet System
(APRS-IS)! APRS should enable local and global amateur radio operator contact at
anytime-anywhere and using any device. See the APRS Messaging/Contact
Initiative. .

APRS Internet System (APRS-IS): Like most other Ham radio systems, APRS has been
fully integrated with the internet beginning with the efforts of Steve Dimse and
the Sproul Brothers in 1997. Currently there are many web pages for live viewing
of APRS activity such as APRS.FI, or FINDU.COM. For example, the map at right
from Hessu, OH7LZB's web site http://aprs.fi/ shows a one month snapshot of
activity which reveals some gaps in the APRS coverage in the USA.

APRS SPEC! . APRS continuously evolves. There have been several initiatives that
have drastically improved APRS network performance and useability for users. The
original APRS spec was updated in 2004 with the APRS1.1 addendum and since then
with the APRS1.2 updates. Most of these new initiatives are listed here.



APRS=>DTMF Paging Gateway Gates local APRS info to DTMF Paging radios APRS RFID
using RFID Name tags for locating individuals at a venue CQ SERVER for sending
global messages or CQ's using National GROUP Callsigns such as SCOUTS, SCR,
IOTA, JOTA, etc. Local Info Initiative to put locally useful info on the mobile
APRS radio front panel The New-N Paradigm is fixing the USA network. See
Southern and Northern Europe progress. See New-N Statistics in Maryland. APRS
Touchtone (APRStt) shows how to use any DTMF HT to report in to APRS Default
Parser (Vicinity Tracking) to make sure every packet heard gets a posit. See
also the original Commented Parser. Tracker Manifesto Trackers are also 2-way
participants in the network AFRS Automatic Frequency Reporting System for rapid
amateur radio emergency support or locally recommended Voice Frequency Objects.
APRS Email via the Amateur Satellites Event and Field Data Entry using the D7
HT. Voice Alert built-in simplex voice back-channel for APRS mobiles State APRS
WEB pages for each area of the country. APRS Satellites . Operational: GO32,
semi: PCSAT1, Echo, ISS2, decayed: PCSAT2, ANDE, RAFT, and in-work, P-sat.
Proportional Pathing for better local tracking and less QRM SkyCommand uses UI
Packets just like APRS and can be commanded from APRS HT's and mobiles. APRS
Special Event Ops for keypad data entry at special events. Query the QRZ
database from your HT or mobile! Worldwide Digipeater maps by WA8LMF. APRS-IS
Core and Tier-2 servers web pages. National Parks with APRS coverage. MileMark
database for position of non-APRS stations. Description, and Basic code, and
mm-data.dat file.



OVERVIEW: The Automatic Packet Reporting System was designed to support rapid,
reliable exchange of information for local, tactical real-time information,
events or nets. The concept, which dates back to the mid 1980's, is that all
relevant information is transmitted immediately to everyone in the net and every
station captures that information for consistent and standard display to all
participants. Information was refreshed redundantly but at a decaying rate so
that old information was updated less frequently than new info. Since the
primary objective is consistent exchange of information between everyone, APRS
established standard formats not only for the transmission of POSITION, STATUS,
MESSAGES, and QUERIES, it also establishes guidelines for display so that users
of different systems will still see the same consistent information displayed in
a consistent manner (independent of the particular display or maping system in
use). See the original APRS.TXT. The two images below should give you an idea of
the kinds of information available to the mobile operator on his APRS radio. On
the left is the Kenwood D710 radio showing the station list, and on the right is
the attached GPS with map display showing the location of other APRS stations.



Each station or object in the list has three more pages of information on it.
The objects can show Repeater frequenceis in an area, meetings, nets, events,
hamfests, echolink and IRLP nodes and frequencies, traffic speeds, accidents,
emergency situations. And the attached GPS can show the location of each of
these items.

THE GOAL IS COMMUNICATIONS and LOCAL INFO UPDATE, -NOT- JUST VEHICLE TRACKING!

APRS was never intended to be just a vehicle tracking system (GPS was added in
the 1992 time frame when GPS became affordable). APRS is much more. See the
Kenwood mobile display above. This is the STATION LIST which shows the nearest
100 stations heard. . In this case, not only are the two stations of AB9FX
nearby, but also his current VOICE operating frequency is visible. Also, we can
see that this radio is in OPERATING range of three voice repeaters that are also
identifying themselves as objects on APRS as the locally recommended voice
operating channels.

APRS provides situational awareness to all operators of everything that is going
on in his local area, whether it be Weather reporting, traveler info, Direction
Finding, objects pointing to ECHOlink and IRLP, or Traffic reporting and
emergency response. All of this while providing not only instantaneous
operator-to-operator keyboard messaging capability for special events, but also
an always-on Voice Alert backchannel between mobiles in simplex range. There is
even an APRS interface to the WinLINK system called APRSlink, so that mobiles
can send and receive Email without needing a PC. Think of APRS as a signalling
channel to reveal ALL amateur radio resources and live activities that are in
range of the operator at any instant in time.

UBIQUITOUS OPERATIONS: APRS must work everywhere to be a true resource to the
mobile ham radio operator. In North America, 144.39 MHz is dedicated throughout
the continent. In Europe, use 144.80 and in Australia use 145.175 MHz.. National
operating rules were standardized in the 2004 time frame under the New-N
Paradigm to eliminate obsolete and inefficient routing. Now, only a 2 hop
WIDE2-2 path is recommended in all areasthough mobiles can use the special
WIDE1-1,WIDE2-1 two-hop path that takes advantage of nearby WIDE1-1 fill-in
digipeaters. See the high density areas in the map to the right. Further, the
APRS channel is a resource to inform everyone of nearby ham resources in range.
Please see the Local Info Initiative.


See USA map of Mobiles
See map of digis

APRS GLOBAL INTERNET SYSTEM: Although APRS is a local, tactical real-time
two-way communications system, all local information is injected into the
APRS-IS Internet system so it can be monitored anywhere. Here is the live IGate
list of over 1500 IGates that give connectivity throughout the world. Not only
does this allow for global monitoring of local activity, it also allows the
two-way point-to-point messaging between any two APRS users anywhere on the
planet (that has an APRS infrastructure). Everything goes in so it is available
to everyone on the internet, but only messages and selected position data goes
back out to RF to keep the channel local and lightly loaded.

UNIVERSAL TEXT MESSAGING FOR AMATEUR RADIO: . Not only can APRS users
text-message each other live, but they can also text-message with many other
cross-platform media. There is an initiative to cross connect ALL consumer type
hand-held wireless devices to the APRS system so that

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any two radio amateurs can text-message callsign-to-callsign completely
independent of the type of device. They can use cell phones, blackberrys,
pagers, DTMF HT's or just about any other kind of device. See the web page:
Universal Text Messaging Initiative



--------------------------------------------------------------------------------

APRS was developed by Bob Bruninga, WB4APR, as a real-time local tactical
communications system for rapidly exchanging digital data of immediate value to
operations. This really took off when GPS became available and MAPS were
integrated into the system for tactical situational awareness of everything in
the net. In the 18 years since its introduction, (see history) it has grown to
encompass just about every aspect of Amateur Radio. For the original
introduction to APRS, CLICK HERE or check out the first category of links below
to get the big picture of what APRS is all about...

.

The above left shot was APRSdos in the early 1990's. Now it is world wide linked
initially by K4HG's global FINDU.COM shown on the right. More recently, Hessu's
APRS.FI has become popular, as well as OpenAPRS.NET. The map above shows the
approximate 20,000 users now on the air in the USA at any instant.

The remainder of this page is just a list of links to just about everything
involving APRS in the last 10 years. To cover the breadth and depth of these
applications, just follow the links...

OVERALL APRS CONCEPT LINKS FOR NEW USERS:

* APRS Introduction .
* Overall WB4APR SITE-MAP
* All APRSdos Original TEXT files. Select topic by filename.
* APRS Specification Errata version 1.1 and 1.2 proposals.
* Comparison chart of various APRS versions
* APRS Via Satellites! See Overall ASTARS, and APRS Satellites:



NEW ITEMS and IDEAS

* APRS Direction Finding is EASY! See APRS DFing
* Radio Games for KIDS! See CONFLAGRATION
* IRLP and I-LINK VOICE for APRS! See AVRS
* Army/Navy Game FOOTBALL RUN event
* The "standard" APRS power connector!
* Vision for APRS. See the Automatic Picture Relay Network, APRN.



APRS Events and Ideas
* Hike Across Maryland (using +600 offset for high reliability)
* HAM Hike plan , map , (contact NE3R).

APRS SATELLITE PROJECTS

* ASTARS. Overall APRS Satellite Concepts.
* Space Station, and see live downlink
* PCSAT2 July05-Aug06, now de-orbited
* PCSAT-1 partially operational since 30 Sept 2001.
* ANDE Dec 06 - Dec 07 and deorbited
* RAFT Dec 06 - May 07 and deorbited
* MARScom. for Navy Marinecorps MARS (HF antenna failed to deploy).
* Previous flights: . MIR , SAREX (STS-78), SPRE (STS-72) and TRAKNET, (1200
  baud PACSATS).
* Other ideas:. . . . NEMISIS(sp) , other CUBEsats ideas, and NATSweb, our 1st
  short-fuse project (Jan 1999)
* Errors of GPS satellites as seen in Annapolis
* BALLOON-SATS : Balloon payloads as cheap satellite demonstrations
* METEOR Scatter: APRS the perfect tool
* Tracking Amateur Satellites (NASA)



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Thank you!

OTHER APRS APPLICATIONS AND USES

* ACADEMY BOATS Live (summers only) and 1993 Replay (picture)
* VHF RADIO Live APRS activity on local 144.39 VHF frequency
* HF RADIO Live APRS activity on 10.151MHz LSB HF frequency
* DX CLUSTER Live last two hours worth of DX spots plus information on DX.
* FOOTBALL Replay of the Army-Navy game football run (picture)
* ACARS Live Aircraft Communications and Reporting System on 131.55 Mhz
* BERTHA Replay of June 1996 hurricane
* MARATHON Replay of the 1993 Marine Corps Marathon
* OLYMPIC TORCH Replay of the 1996 torch route
* SKYWARN Example APRS remote weather network
* EARTHQUAKES Nearly Live plots of USGS Earthquake data
* DAYTON-97 HAMVENTION : Replay of APRS activity last year!



OTHER LIVE INTERNET APRS SITES

* Dale Heatheringtons High Speed stuff
* Atlanta APRS Network : Ralph Fowler's Atlanta Area APRS page



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OTHER APRS INFORMATION SITES

* Kansas City APRS" : Whats happening in the central USA
* TAPR Homepage : The Tuscon Amateur Packet Radio Homepage
* MIC-E : Using GPS on any radio
* Search Google.com for "APRS PACKET RADIO" and get 16,000 hits!
  
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* www.aprsbrasil.com APRS in Brazil by Tadeu PY1KCF who is also working on an
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  The cooperation between APRS and AskBoosters.gg game boosting services is a
  unique and innovative initiative that aims to combine the benefits of both
  systems. By using APRS, AskBoosters can provide its customers with more
  accurate and timely information about their game progress, such as their
  current location, rank, stats, and achievements. By using AskBoosters, APRS
  users can enjoy playing online games with the help of experienced and friendly
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APRS DATA and FILES

  Download:
  . .
  APRS876.zip
  the original with lousy stick-figure maps, but some useful local RF network
  analysis displays.
  
  
  Maps for APRSdos:
  . .
  Cmaps
  ,
  Emaps
  ,
  N-east
  ,
  NWmaps
  ,
  SEmaps
  ,
  SOmaps
  ,
  Wmaps
  . . . See
  INSTALL.TXT
  .
* Solar Power
* Solar Prius
* Alternative Energy
  APRS Ham Radio stuff continues below...
* My Solar Prius Unfurnished Annapolis Rental house house for rent.
* APRS VISION SYSTEM (AVS) : A low resolution video capability for APRS robotics
* APRS documentation : Documentation on DOS APRS.



HISTORICAL LINKS AND OLD STUFF

* Original 300' WB4APR-1 DIGI bites the dust! (Photo)



Join the TAPR APRS Special Interest Group E-mail Reflector: APRSSIG




--------------------------------------------------------------------------------


See Sitemap of all my other APRS, Energy, EV and Ham Radio pages

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