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Topics to be covered

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

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Topics to be covered

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  1. 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

  2. What is APRS • Automatic • Position • Reporting • System • By Bob Bruninga, WB4APR • Brief history

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

  4. 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.

  5. How do I view APRS?

  6. Software • DOS APRS 847 • WinAPRS and MacAPRS 2.4.7/3.4.7 • APRS+SA 1.99 • XAPRS for Linux (currently in beta) 0.4.7 • pocket APRS (Palm Pilot) 1.08 • APRSdigi, digi software • APRSce Version 0.99 (Beta) Build 806 • Xastir 0.3.6 • aprsD 2.1.4 (APRS server software for Linux, no GUI)

  7. OK, now how do I go mobile? • TNC route • Mic-E route • Pic-E route • GPS receiver • So you want to use a laptop?

  8. Mobile Equipment

  9. 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”

  10. A laptop in the vehicle for APRS • A TNC or laptop with a soundcard is required • AWGPE can use the sound card to emulate a TNC • Second radio and antenna • Source of power for laptop, inverter or DC plug to the accessory jack • Extra set of eyes !!

  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 (DIGIS) 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. Basic operational description • 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.

  14. 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.

  15. What else can I do with APRS • Connect your weather station • DF abilites • track vehicles (balloons, trucks, space vehicles, hurricanes) • Messaging, regular format and NTS format • Propagation, PropNet • Send Weather related information • Earthquake origins • Create map overlays for specific points

  16. Guy Story: W8XF baloon launch on 8.3.97. The X indicates max altitude achieved.

  17. Digipeater does and don’ts

  18. Other station tips • What is my tnc deviation? • The target is 3 kHz deviation, not too high or too low • TNC2 clones and XR2211 based TNCs are picky about tone quality and amplitude ratio • Go to http://www.febo.com/layer-one/index.html for more data. • Open squelch?????? • Hidden and deaf transmitters, not good

  19. 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 • Dale Huguley KG5QD

  20. Missing Radio • Kenwood TH-D7 • Owner is Russ McConnel • Sebastian Florida • if found please see registration table

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