1. APRS
What is it?

2. APRS
Automatic

3. APRS
Automatic
Packet

4. APRS
Automatic
Packet
Reporting

5. APRS
Automatic
Packet
Reporting
System

6. Brief APRS History
Developed by Bob Bruninga WB4APS

7. Brief APRS History Developed by Bob Bruninga WB4APS
First implementation in 1984

8. Brief APRS History Developed by Bob Bruninga WB4APS
First implementation in 1984
Evolved into the current system in 1996.

9. APRS Capabilities
Not just a position reporting system.

10. APRS Capabilities Not just a position reporting system.
Text messaging.

11. APRS Capabilities Not just a position reporting system.
Text messaging.
Weather information.

12. APRS Capabilities Not just a position reporting system.
Text messaging.
Weather information.
Other telemetry.

13. APRS Capabilities Not just a position reporting system.
Text messaging.
Weather information.
Other telemetry.
Self-Identifying.

14. A Little Technical Stuff
APRS vs APRS-IS

15. A Little Technical Stuff
APRS vs APRS-IS - APRS is the ‘over the air’ part.

16. A Little Technical Stuff
APRS vs APRS-IS - APRS is the ‘over the air’ part. - APRS-IS is the internet part.

17. A Little Technical Stuff
Data transmitted in an AX25 packet.

18. A Little Technical Stuff
Data transmitted in an AX25 packet.
Uses Audio Frequency Shift Keying (Bell 202).

19. A Little Technical Stuff
Data transmitted in an AX25 packet.
Uses Audio Frequency Shift Keying (Bell 202).
In North America, APRS uses MHz.

20. A Little Technical Stuff
Data transmitted in an AX25 packet.
Uses Audio Frequency Shift Keying (Bell 202).
In North America, APRS uses MHz.
W. Washington Low Power on MHz.

21. A Little Technical Stuff
Data transmitted in an AX25 packet.
Uses Audio Frequency Shift Keying (Bell 202)
In North America, APRS uses MHz.
W. Washington Low Power on MHz.
Also on UHF, HF, and satellites.

22. A Little Technical Stuff
Data transmitted in an AX25 packet.
Uses Audio Frequency Shift Keying (Bell 202)
In North America, APRS uses MHz.
W. Washington Low Power on MHz.
Also on UHF, HF, and satellites.
Beacon only device.

23. A Little Technical Stuff
Data transmitted in an AX25 packet.
Uses Audio Frequency Shift Keying (Bell 202)
In North America, APRS uses MHz.
W. Washington Low Power on MHz.
Also on UHF, HF, and satellites.
Beacon only device.
Beacon with a receiver.

24. A Little Technical Stuff
What’s an IGate?

25. A Little Technical Stuff
What’s an IGate? - Hears APRS data over RF and relays the data to the APRS-IS servers.

26. A Little Technical Stuff
What’s an IGate? - Hears APRS data over RF and relays the data to the APRS-IS servers. - Does not rebroadcast the data over RF.

27. A Little Technical Stuff
What’s an IGate? - Hears APRS data over RF and relays the data to the APRS-IS servers. - Does not rebroadcast the data over RF. - APRS-IS would not work without IGates.

28. A Little Technical Stuff
What’s a Digipeater?

29. A Little Technical Stuff
What’s a Digipeater? - Retransmits received data over the air.

30. A Little Technical Stuff
What’s a Digipeater? - Retransmits received data over the air. - Works in a ‘store and forward’ mode, since APRS uses a single frequency.

31. A Little Technical Stuff
What’s a Digipeater? - Retransmits received data over the air. - Works in a ‘store and forward’ mode, since APRS uses a single frequency. - Too many digipeaters in a small area can cause problems.

32. A Little Technical Stuff
Some devices are only IGates.

33. A Little Technical Stuff
Some devices are only IGates.
Some devices are only Digipeaters.

34. A Little Technical Stuff
Some devices are only IGates.
Some devices are only Digipeaters.
Some devices do both.

35. Digipeater Settings
Path - Controls how many ‘hops’ a repeated packet takes.

36. Digipeater Settings
Path - Controls how many ‘hops’ a repeated packet takes. - Lots of discussions about the ‘best’ settings.

37. APRS Using the Internet
APRS.FI

38. APRS Using the Internet
APRS.FI - Probably the best known way to use APRS.

39. APRS Using the Internet
APRS.FI - Probably the best known way to use APRS. - Not a good choice if the internet is down.

40. APRS Using the Internet
Phone Apps

41. APRS Using the Internet
Phone Apps - APRSDroid for Android.

42. APRS Using the Internet
Phone Apps - APRSDroid for Android. - aprs.fi for the iPhone.

43. APRS Using the Internet
Phone Apps - APRSDroid for Android. - aprs.fi for the iPhone. - APRS Windows Phone for Windows Phone.

44. Software
Displays APRS data over ‘local’ RF. - APRSISCE

45. Software
Displays APRS data over ‘local’ RF. - APRSISCE - UI-View

46. Software
Displays APRS data over ‘local’ RF. - APRSISCE - UI-View - Might not have the best maps

47. Terminal Node Controller
Converts ‘modem’ sounds into a serial stream to the pc.

48. Terminal Node Controller
Converts ‘modem’ sounds into a serial stream to the pc. - Hardware: Radio to TNC, then TNC to PC typically via USB or serial.

49. Terminal Node Controller
Converts ‘modem’ sounds into a serial stream to the pc. - Hardware: Radio to TNC, then TNC to PC typically via USB or serial. - Kantronics, Byonics, etc.

50. Terminal Node Controller
Converts ‘modem’ sounds into a serial stream to the pc. - Hardware: Radio to TNC, then TNC to PC typically via USB or serial. - Kantronics, Byonics, etc. - Mobilinkd TNC uses Bluetooth.

51. Terminal Node Controller
Software: Radio directly to PC via the Mic or Line/Aux input.

52. Terminal Node Controller
Software: Radio directly to PC via the Mic or Line/Aux input. - AGW, Direwolf, Soundmodem.

53. Hardware
Radios with Built-In APRS

54. Hardware
Radios with Built-In APRS - Icom (through DSTAR)

55. Hardware
Radios with Built-In APRS - Icom (through DSTAR) - Kenwood

56. Hardware
Radios with Built-In APRS - Icom (through DSTAR) - Kenwood - Yaesu

57. Hardware
Radios with Built-In APRS - Icom (through DSTAR) - Kenwood - Yaesu
Some GPS units can take data from a APRS receiver and display that data on the screen.

58. Hardware
APRS Devices

59. Hardware
APRS Devices - APRS Shield for Arduino

60. Hardware
APRS Devices - APRS Shield for Arduino - Argent Data Systems

61. Hardware
APRS Devices - APRS Shield for Arduino - Argent Data Systems - Byonics

62. Hardware
APRS Devices - APRS Shield for Arduino - Argent Data Systems - Byonics - Microsat

63. Hardware
APRS Devices - APRS Shield for Arduino - Argent Data Systems - Byonics - Microsat - Mobilinkd TNC

64. Real World Applications
ARES Exercise (from APRS.fi)

65. Real World Applications
Balloon Tracking Boy Scout event

66. Real World Applications
Balloon Tracking Boy Scout event
Rocket Tracking Embry-Riddle

67. Real World Applications
Cover a wider area with a repeater.

68. Real World Applications
Cover a wider area with a repeater. - Adjust transmit delays.

69. Real World Applications
Cover a wider area with a repeater. - Adjust transmit delays. - Collisions with repeater ID’er. - Check with the repeater owner!

70. Real World Applications
Using a non-standard frequency.

71. Real World Applications
Using a non-standard frequency. - Avoid seeing unwanted stations.

72. Real World Applications
Using a non-standard frequency. - Avoid seeing unwanted stations. - Check the bandplan!

73. A Few Links www.aprs.org www.aprs.fi APRSISCE UI-View AGW Direwolf
Soundmodem

74. A Few Links
For Apple - MAC APRS Software: