1. APRS Ad-hoc Networks Appalachian Event 24 Jul 2011

2. APRS Digipeating 101 Digipeating concept:

3. National Digi Infrastructure But sometimes they are down, or you need an ad-hoc network

4. All of these radios can digipeat! Anytime, anywhere Do we want them to? NO! Horendous QRM on channel Impossible to control Absentee operators Never read their messages! Do we want them to? YES! but only when we need it (under our user control)

5. APRS Digipeating 101 Digipeating Mechanisms: MYCALL – APRS VIA WB4APR… APRS,WB4APR*every TNC MYALIAS – APRS VIA RELAY… APRS,RELAY*every TNC ----------------------------------------------------------------------------------------------------------------------------------- UIDIGI - APRS VIA MOBILE… APRS,WB4APR-9*Call substitution ----------------------------------------------------------------------------------------------------------------------------------- UITRACE – APRS VIA WIDE3-3… APRS,WB4APR-9*,WIDE3-2Decrements N & trace UIFLOOD – APRS VIA MDC3-3… APRS,MDC3-2Decrements N UIFLOOD (ID enabled) APRS,DIGIL,MDC3-2Decrements N inserts call of last digi only UIFLOOD (FIRST kenwood ) APRS,DIGI1,MDC3-2Decrements N inserts call of first digi 1978 1980 1995 1998 NetRom, TheNet => Beacons/ Digipeating illegal

6. APRS Digipeating 102 How we use these capabilities for APRS: Universal path for fixed stations,VIA WIDE2-2 For Mobiles VIA WIDE1-1,WIDE2-1 MYCALL – APRS VIA WB4APR-9,WIDE2-2… APRS,WB4APR-9*,WIDE2-2anytime MYALIAS – APRS VIA WIDE1-1,WIDE2-2…APRS,WIDE1-1*,WIDE2-2 untracable ----------------------------------------------------------------------------------------------------------------------------------- UIDIGI - APRS VIA WIDE1-1,WIDE2-2…APRS,WB4APR-9*,WIDE2-2dupes UITRACE – APRS VIA WIDE1-1,WIDE2-1…APRS,WB4APR-9*,WIDE1*,WIDE2-1 *** UIFLOOD – APRS VIA MDC3-3… APRS,MDC3-2local

7. APRS Digipeating 102 How we use these capabilities for APRS: Universal path for fixed stations,VIA WIDE2-2 For Mobiles VIA WIDE1-1,WIDE2-1

8. APRS Digipeating Why do we keep N to 2 or less? UITRACE – APRS VIA WIDE1-1,WIDE2-1…APRS,WB4APR-9*,WIDE1*,WIDE2-1 ***

9. APRS Digipeating Why do we keep N to 2 or less? UITRACE – APRS VIA WIDE1-1,WIDE2-1…APRS,WB4APR-9*,WIDE1*,WIDE2-1 ***

10. SSn-N digipeating Using the path of MD6-6 hits every digi in Maryland only 120 dupes vs 15 copies desired

11. APRS Digipeating Proportional Pathing! Every other packet is simplex direct. Every other is 1 hop. Every 4 th is 2 hops

12. APRS TEMPn-N Digipeating How to use for IMMEDIATE TEMPORARY USE?: EVERY MOBILE and or Emergency back up system should always support TEMPn-N digipeating MYCALL – APRS VIA WB4APR-9,WIDE2-2… APRS,WB4APR-9*,WIDE2-2anytime MYALIAS – APRS VIA WIDE1-1,WIDE2-2…APRS,WIDE1-1*,WIDE2-2 untracable ----------------------------------------------------------------------------------------------------------------------------------- UITRACE – APRS VIA TEMP1-1,WIDE2-1…APRS,WB4APR-9*,TEMP1*,WIDE2-1 *** UIFLOOD – APRS VIA TEMP7-7… APRS,TEMP7-6local

13. APRS Ad- hoc Networks East Coast Backbone

14. Annual Golden Packet Event Appalachian Event 24 Jul 2011

15. Annual Golden Packet Event

16. Simple digipeater node

17. Annual Golden Packet Event Power is the issue

18. APRS HOPn-N Digipeating For the AT Golden Packet Event, we supported 2 paths: HOPn-N (non tracing): arrived as DIGIx,HOP7-1 TEMPn-N (Tracing): arrived as DIGI1,DIGI2,DIGI3,etc GOLDEN packets used HOP7-7,HOP7-7 to make it 15 stations end to end TEST packets used the minimum TEMPn-N to trace their neighbors. ----------------------------------------------------------------------------------------------------------------------------------- UITRACE TEMP - The actual TNC command to set up TEMPn-N support UIFLOOD HOP – The actual TNC command to set up HOPn-N support

19. Link by Link maps Georgia Springer Mountain,

20. Link by Link maps Clingmans Dome Roan Mtn Comers Rock

21. Link by Link maps Comers AO Mtn Hawkbill

22. Link by Link maps White Rock Cliffs Maryland Mountain Gov Dick Hill

23. Link by Link maps

24. Camelback Sam’s Pt Greylock (Highpoint)

25. Link by Link maps Sam’s Point Greylock NH Link? Mt Washington

26. Link by Link maps Greylock Mt Washington Sugarloaf, ME Katahdin!

27. More fun with Google Maps Enter the Bubble and look around!

28. Google Earth! The shack-potato’s tool

30. Live or Google?

31. Annual Golden Packet Event My site. Gov’ Dick Hill

32. Annual Golden Packet Event Lots of hardware to lift

33. Annual Golden Packet Event

34. Highest is NOT best!

35. Highest is NOT Best!

37. Annual Golden Packet Event Sam’s Point used D72 HT (also Mt Wash)

38. Mountain Top RFI! Sam’s Point used D72 HT (also Mt Wash)

39. RF Link Analysis Tool (free) KX4O John Huggins did all analysis

40. 40 Appalachian Trail Golden Packet KX4O John Huggins Complete RF Link Analysis!

41. RF Link Analysis Tool (free) But it worked for me! Also shows statistics. Here is a -10 dB and +10 dB link

42. Annual Golden Packet Event KA1YBS climbed a mile straight up Katahdin

43. APRS TEMPn-N Digipeating How to use for IMMEDIATE TEMPORARY USE?: EVERY MOBILE and or Emergency back up system should always support TEMPn-N digipeating MYCALL – APRS VIA WB4APR-9,WIDE2-2… APRS,WB4APR-9*,WIDE2-2anytime MYALIAS – APRS VIA WIDE1-1,WIDE2-2…APRS,WIDE1-1*,WIDE2-2 untracable ----------------------------------------------------------------------------------------------------------------------------------- UITRACE – APRS VIA TEMP1-1,WIDE2-1…APRS,WB4APR-9*,TEMP1*,WIDE2-1 *** UIFLOOD – APRS VIA TEMP7-7… APRS,TEMP7-6local