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Introduction to APRS By Guy Story, KC5GOI

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Presentation on theme: "Introduction to APRS By Guy Story, KC5GOI"— Presentation transcript:

1 Introduction to APRS By Guy Story, KC5GOI

2 Topics to be covered What is APRS? Why do I want APRS? How do I view APRS? OK, now how do I go mobile? Current software The internet piece of the puzzle Upcoming goodies

3 What is APRS A utomatic P osition R eporting S ystem By Bob Bruninga, WB4APR Brief history

4 History of APRS Initial use as we know it in 1990 to track boats during summer cruises. The following flavors followed. MacAPRS WinAPRS APRS+ pocketAPRS just released PerlAPRS XAPRS released as beta at 1999 Dayton Hamvention

5 Why do I want APRS? For Starters…. Ok, Joe Ham tells me he has a bike rider down but has no clue were he is. Or, Joe Ham has hail coming down and still has no clue were he is. Joe Ham is part of a disaster evaluation team.

6 How do I view APRS?

7 Software There are many flavors to APRS DOS APRS WinAPRS and APRS+SA MacAPRS XAPRS for Linux (currently in beta) pocket APRS (Palm Pilot) APRSdigi, digi software PerlAPRS

8 OK, now how do I go mobile? TNC route Mic-E route Pic-E route GPS receiver Do I have/want to use a laptop?

9 Mobile Equipment

10 TNC Verses Mic-E or Pic-E TNC route requires a separate radio Mic-E and Pic-E can go in-between radio and mic. Either route can be run on separate radio Either route is referred to as a TRACKER

11 Definitions A tracker is a mobile station Posits are position reports UI Frames are frames that do not employ error correction techniques, entirely that is. Digipeaters are stations that act as a simplex repeater except in a digital format IGATES are stations that feed data to and from the internet

12 Definitions GATES are stations that take the HF APRS data and retransmits them on VHF and possible the internet. APRServers are stations that IGATES send data to and redistribute them to the IGATEs

13 How does it work, basically? A tracker or fixed stations sends out a UI frame that has lat/long and possibly other data. If the packet burst passes the checksum, the info is then displayed on the screen. If the checksum fails, the packet is lost. This is not a big deal since the posit will be transmitted again soon.

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16 The Next Level IGATES, why would I want to do this? IGATES provide a feed to the net so everyone can see what is going on and allows for messaging on a world level Balloons, mobile stations, weather events you want to track, using automated watch/warning data to transmit in your area.

17 What else can I do with APRS Connect your weather station DF abilites track vehicles (balloons, trucks, space vehicles, hurricanes) messages Propagation, PropNet

18 Guy Story: W8XF baloon launch on The X indicates max altitude achieved. Guy Story: W8XF baloon launch on The X indicates max altitude achieved.

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20 Digipeater does and donts

21 Other station tips What is my tnc deviation? The target is 3 kHz deviation Greatly improves channel throughput. Go to one/index.html for more data. Open squelch?????? Hidden and deaf transmitters

22 Credits Bob Bruninga, WB4APR TAPR Mark, KB2ICI and Keith, WU2Z, Sproul Brent Hilderbrand, KH2Z Steve Dimse, K4HG Mike Musick, N0QBF Rich Perry, W9IF John Ackerman, N8UR


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