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1996-01-02
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WELCOME NEW REGISTERED USER! YOUR VALIDATION NUMBER IS: ___________________
1. See INSTALL.txt and BE SURE TO USE PKUNZIP -d TO UNZIP APRS!
2. Within the program hit F1 to select from a number of HELP screens
3. Use the README FILE INDEX below to find detail on many APRS subjects
4. APRS commands are single KEY commands. Some bring up additional menus
SUMMARY: APRS can be summed up with two concepts, REAL-TIME PACKET TACTICAL
COMMUNICATIONS and MAPS. Probably 98 % of APRS potential does not need GPS or
any tracking devices. Think of APRS as just a multi-user distributed packet
network with a MAP display for many exciting amateur applications:
Network topology monitoring Direction Finding Weather reporting
Frequency Coordination database DX cluster monitoring HF DX plotter
AMSAT ground station tracker Satellite tracker Search & Rescue
Special event tracker/organizer Boat/mobile/RV tracker RF path estimating
Local area CHAT mode Telemetry displays
For the Vehicle tracking it is important to use the standard 145.79, 445.925,
HF 10.1515 LSB and CB channel 29 vehicle tracking frequencies, where available.
Mobile's are often XTAL controlled. See HF. and UHFFREQ.txt for freqs.
In addition to these standard APRS freqs, use APRS as a monitoring tool on
all frequencies for plotting the locations of NODES, BBS's, DIGI's and other
network assets which include their position in their beacons. This is an
excellent Frequency Coordination tool! Each night when you secure, tune
your APRS radio to a different digital frequency and see who you pick up.
DEMONSTRATIONS: There are two important DEMO commands for past events. First,
load a snapshot (nothing moves) of previous events from the BACKUP files using
the FILES-LOAD command. Secondly, use the more powerful FILE-REPLAY command
to replay track histories of previous events. Many past APRS events are
included on the distro disk. Replay them all and use the PgUP/DN keys and
HOME key to zoom in or out as the file is replayed.
DOCUMENTATION: Since APRS is a generalized tool with application in almost
all facets of amateur radio, it is hard to write a simple description. So
choose from any of the following .TXT files. These files can be read ON-LINE
using the F1(HELP)-FILES command. These files are in the README subdirectory:
FILENAME DESCRIPTION
---------- ------------------------------------------------------------
INSTALL.txt Tells you how to unzip the APRS distro disk and get started
README.1st This file. Provides an overview and INDEX to all other files
NEWNOTES.txt Tells of important changes in the latest versions
APRS.doc General description and overview of APRS
AIRCRAFT.txt Using APRS from Aircraft and how to interface to ARNAV format
BBSNOTES.txt Suggestions to BBS SYSOPS on how to use APRS
BOATS.txt Suggested use of APRS to support the WaterWay Net
CELLULAR.txt Using APRS for nationwide vehicle tracking via Cellular phone
COMMERCL.txt COMMERCIAL APRS to interface with other DELORME/STREETS prgms
DF.txt Information on DFing and AUTOMATIC Doppler interfaces!
DEMOS.txt A quick summary of demonstrations and replays to impress you.
DIGIS.txt Important info on using Digipeaters
DIGITIZR.txt Using DIGITIZERS to draw your own maps with MAPFIXER.bas prgm.
DOWNLOAD.txt List of BBS's and FTP sites carrying APRS
PROTOCOL.txt Info on APRS formats for setting up TNC BTexts
DXclustr.txt Info on using APRS to plot DX spots on a DX cluster frequency
GPS.txt Interfacing GPS or LORAN to APRS or stand-alone TNC's
HF.txt Notes on the APRS HF tracking network
HELP.txt Describes each of the APRS commands in detail
MAPS.txt Overview of MAP distribution and sources, experts and Elmer's
MAPMAKIN.txt Details on the structure of an APRS map file
MAPS-CD.txt How to make maps from the USGS CD ROMS ($32 each)
MARATHON.txt Lessons learned at the Marine Corps Marathon
METEORS.txt How to use APRS during meteor showers
MOBILE.txt Notes on Mobile operations with GPS
MOUSE.txt How to use a MOUSE with APRS
OPS.txt Suggestions on routine APRS operations
SCREEN.txt Describes the APRS screen and display areas
SPACE.txt Suggested use of APRS for plotting satellite packet stationns
SYMBOLS.txt A table of APRS symbols and the symbol designators
TELEMTRY.txt Describes a SINGLE-CHIP TNC telemetry xmtr for balloons, etc..
TROUBLE.txt Hints and ideas for troubleshooting
VOX-APRS.txt Integrating APRS into voice repeaters
WX.txt Info on using APRS for displaying weather information
70CHANLS.2m 70 hidden channels on 2m for bulk data transfer!
IDEAS.txt A file of other neat APRS ideas to encourage others to write
supporting TNC and forwarding code. Programmers READ IT!
SETUP: First, zoom into your area of activity with the Page and HOME keys.
Next set your desired digipeater path using the APRS UNPROTO command. This
command needs your TNC connected before it can work. (To understand the
UNPROTO concept, refer to your TNC manual). Finally, use the ALT-SETUP
menu to SAVE your config file. Give your validation number when prompted
and select a CONFIG file extension. Usually the default .APR.
Non US hams can change the default map from the USA location by changing the
LAT/LONG and RANGE in the first three lines of the MAPLIST.USA file. Be sure to
use the MAPS-CHANGE command to change to your regional MAPLIST.xxx file. Many
states have developed their own: CA, OH, AK, MO, MN, NC, etc.. (see MAPS.txt)
MAPS! - Maps to the street level can be made for anywhere in the world using
the map making tools provided with APRS. To see example street level maps,
zoom into Idaho Falls at the 1 mile range, or either Baltimore or NewOrleans
at the 4 mile scale to see maps made with a digitizer. See North Tennessee
for the type of highway maps available on the USGS 2,000,000 CD ROM, or zoom
into my QTH at 3909N 07636W to see the 100k CD ROM map made by KB8JXO. You
can make your own maps from the directions in MAPMAKIN.txt using a variety of
techniques. You can purchase the $32 USGS CD for your area and use MKMAPHK.EXE
to make street level maps anywhere in your area. See MAPS-CD.txt. Or use
MAPFIX.exe and a digitizer to make any map anywhere. You can even make a map
using paper and a ruler and a text editor!. OR just replay a GPS track history
in the MAPFIXxx.BAS program and build your own map!
APRS is now distributed in four regional versions due to the large number
of maps becoming available. See README\MAPS.txt for details. Look for an APRS
BBS in your state for detailed local maps. If your area does not have at least
the major highways on your maps. Let me know.
APRS PROTOCOL: APRS uses Unnumbered Information (UI) frames without ACKS to
avoid the problems of a normal connected network. You need to understand
DIGIPEATING and the UNPROTO command, since you are responsible for your own
best path within the network. If you are unfamiliar with these UI terms,
consult your TNC user manual. Also note that while APRS is running, it
generates its own Position and Status beacons. Your TNC BText is not used
until you Quit APRS; then your TNC BText is activated.
PACKET POSITIONS ON ALL FREQS: Encourage all BBS's, NODES, Servers, and other
stations in your area, to place their LAT/LONG in their beacon text using
the format: BT !DDMM.xxN/DDDMM.xxW/....comments. APRS will also plot the
positions of stations reporting by Grid Square surrounded by brackets [FM19xy]
(at the beginning of the BText only). If all packet assets get in that habit,
then APRS will automatically plot a map of packet activity on any frequency!
If stations will also use the Power/antenna/gain format in their BText,
then effective communications ranges can also be displayed! See PROTOCOL.txt.
STAND-ALONE-GPS-TRACKERS: Most new TNC's now include a GPS command that tells
the TNC to accept GPS data on the serial port and transmit it periodically.
Assembling a TNC, GPS and a radio is all that is needed to build a dedicated
stand-alone tracking device. No PC nor APRS is needed on the vehicle. If you
do run APRS in the mobile, see GPS.txt for ways to interface your TNC and GPS.
MORE READING:
QST - pg 92 July, pg 11 Aug 93 QST, pg 14 Dec 94, pg 68 Oct 95 about TNC's
QEX - Feb issue, 1994 for info on interfacing GPS to packet
CQ - Packet column Dec 1993
73 - October 94 under the topic of HOMING IN. Also in Jan, Feb 95 issues
AMSAT - May 1993, AMSAT journal (but registration info is incorrect).
EMAIL: Look for an APRS point of contact or BBS for your state. Alabama, for
example has over 200 maps! Also join us on the internet APRS Special Interest
Group, aprssig@tapr.org. I post the latest on the Annapolis BBS at 410 280-2503
and from there it goes everywhere.
SEE DOWNLOAD.txt for a list of BBS's, WWW and INTERNET sites.!
APRS INTERNET SPECIAL INTEREST GROUP: To subscribe, send a message to
`listserv@tapr.org` with the following line in the body of the message:
subscribe list full_name Example: subscribe aprssig FirstName LastName
For info on APRS COORDINATORS for our area, see MAPS.TXT.