WCARES University April 12 2014 What is APRS Automatic Packet Reporting System Amateur radio based real time tactical communications for the local area Developed in 1982 to map HF Navy position reports ID: 541323
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Slide1
Getting Started in APRS
WCARES University
April 12, 2014Slide2
What is APRS?
Automatic
Packet
Reporting SystemAmateur radio based, real time tactical communications for the local areaDeveloped in 1982 to map HF Navy position reports
APRS is a registered trademark of Bob
Bruninga
, WB4APRSlide3
Capabilities
See who is in range
Track an operator’s position
Find out repeater frequencies, tones, and net times in a new cityCheck and send messages in Winlink
Send text messages via RF and the InternetDisplay weather alertsShare bearings and signal strengths for DF
Identify gaps in Search and Rescue operationsSlide4
Limitations
Packet collisions and finite bandwidth
No error correction
Packet delivery not guaranteedSome objects aren’t “listening”Reliability decreases with 60-120 usersSlide5
Why APRS?
Supplement voice channels during emergencies or special events
Friends and family can find you when their phones are down
Ever pass an antenna strewn vehicle and wonder how you can talk to them?It’s a great way to learn about VHF propagation*Slide6
How Does in Work?Slide7
Scenario 1 – New In Town
“144.50 PL 123.0
Net Tue 7PM”Slide8
“144.50 PL 123.0
Net Tue 7PM”
Scenario 1 –
New In TownSlide9
Scenario 1 – New In Town
With the APRS-IS tie-in, you can identify ham assets in advance of your trip.Slide10
“K7DCC-9: Monitoring 146.20”
Scenario 2 – K7DCC MonitoringSlide11
“K7DCC-9: Monitoring 146.20”
Scenario 2 – K7DCC MonitoringSlide12
“K7DCC,this is KK4LNO…”
Scenario 2 – K7DCC MonitoringSlide13
TO: K7DCC
Scenario 3 – Text MessageSlide14
TO: K7DCC
Scenario 3 – Text MessageSlide15
Scenario 4 – Fox HuntSlide16
Scenario 4 – Fox Hunt
“180 degrees”
“300 degrees”
“45 degrees”
“80 degrees, low strength”Slide17
Scenario 4 – Fox Hunt
“180 degrees”
“300 degrees”
“45 degrees”
“80 degrees, low strength”Slide18
Scenario 4 – Fox Hunt
“180 degrees”
“300 degrees”
“45 degrees”
“80 degrees, low strength”Slide19
How Do I Get Started?
Checkout the WCARES.org APRS Special Interests Section
Cost
CapabilitiesSlide20
Hardwired Cell
*Slide21
Bluetooth TNC Adapter
*Slide22
* The Difference the Antenna Makes
4W HT Sitting in the Passenger Seat
The same HT hooked up to a VHF antenna outside the vehicle.Slide23
Mapping/Tracking
Programs I Can Recommend
APRSISCE/32
APRSDroidXastirSlide24
APRSISCE/32Slide25
APRSDroidSlide26
Virtual TNCs
Dire Wolf
AGWPESlide27
APRS.fiSlide28
Deadspots
– We Need Your HelpSlide29
For More Information
Mobilinkd.com
WCARES.org
APRS.orgAPRS Beginner’s Guide http://k9dci.home.comcast.net/An example of regional coordination
http://www.nwaprs.info/ Slide30
Questions?Slide31
Extra Credit
Voice Alert
Frequency Agile Operation
Send a short email through Winlink WLNK-1 SMS sam@iam.com
A short message to Sam