aprs - harc home · 2014-02-12 · aprs (automatic packet reporting system) bob bruninga wb4apr us...
TRANSCRIPT
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APRS(Automatic Packet Reporting System)
Bob Bruninga WB4APRUS Naval Academy Satellite Lab
�A local real-time digital network where all-see-all
�Uses all conventional AX.25 1200 baud packet
�Shared simplex channel for simplicity and growth
�Since 1997, integrated with Internet for global view
http://www.ew.usna.edu/~bruninga/aprs.html
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APRSdos in 1992
128 mi
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APRS Now (internet view)
40 Solar Cell Samples
�View with Browser (no two way or messaging)
�Connect via client (Same as local RF, but global)
32 mi
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APRS digipeaters in 1996
1000 USA digis (with 10,000 user stations)
???? World digis (total of 27,000 user stations)
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Vehicle Tracking
Roof top versionUnder seat version
Kenwood
Toolbox version Carrying case All-in-one-radio
Google Search on APRS trackers
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Personal Tracking
Pocket Tracker $89 kit:
Runs for 10 Hrs on 9v battery
Includes low power (0.25W) TX on 144.39 144.99
Google: APRS pocket tracker
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All-In-One APRS Radios
Handheld
Mobile
(GPS needed if moving)
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Integrated Radio APRS
Kenwood
Dual Band Radio with built-in APRS
• Band A on APRS *&* (PL100 Voice Alert)• Band B on your favorite repeater (2m or 70cm)
Radio Display:
•Stations, Objects, Calls, Icons•Course/Speed Distance/Bearing•WX: wind, temp, temp, rain•Stn: Power, Ant height and gain•Messages, Bulletins, Announcements•*Traffic, Satellites in view, Storms
GPS & User Map Display
TM-D700 Mobile
TH-D7 HT
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APRS in Utah Jfindu.aprs-is.net
27 users in S.L.C
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APRS around the world
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APRS around the world
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Special Events
• Stations
• Locations
• Objects
• Tracks
• Areas
• Weather
• Assets
• And Keyboard Messaging
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APRS for Weather Tracking
• WX Reports
• Objects
• Movement
• Predictions
• Warnings
• Areas
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APRS for Marathons
• Assets
• Lead, Tail
• VIP’s
• Comms
• Downed runners
• Ambulances
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Tracking Olympic Torch
Anywhere in country via HF gates or
These days via Internet Gateways
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APRS Perfect for Balloons
�Easy track and recovery
�Typically one every 2 weeks somewhere in the USA
�RF ranges nearly 400 miles
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APRS for Meteor Scatter
•Everyone TX’s
•Short 0.3s packets
•By quadrant for 15s
•Next morning see what you got
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APRS SatellitesShuttle, ISS, Sunsat, PCsatPCSAT2, ANDE, RAFT, Echo?
http://www.ew.usna.edu/~bruninga/astars.html
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Amateur Satellite Transponders
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AMSAT info on your D7-HTSchedule of next 80 minutes is updated every 10 mins
Object Text shows uplink freq, downlink freq & Doppler
Radio shows direction and range to satellite for handheld antenna pointing
Another display shows course and speed of satelite (not shown)
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APRS Space Experiments
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PCSAT2 on ISS next Spring
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Direction Finding (Classic Beams)
http://www.ew.usna.edu/~bruninga/dfing.html
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DF-ing by Fade-Circle-Technique
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OMNI-Direction finding
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Station Range Circles
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ALOHA Circle (channel capacity)
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DIGIpeater Hops1 or 2 hops covers 100 users!
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Highway Mile Mark Reporting
All mobiles
Know their
MileMark
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APRS is everywhere!
Digipeaters are trivial to put up
APRS can use ANY station as a digipeater
APRS network can be come-as-you are
APRS is not an end in itself. It is simply a digital channel for everyone to exchange info of every type to everyone on channel
You can voyer worldwide on the Internet
(or tune us in on 144.39 in USA)…