- Количество слайдов: 23
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 • • Automatic Position Reporting System • By Bob Bruninga, WB 4 APR • Brief history
History of APRS • • • Initial use as we know it in 1990 to track boats during summer cruises. The following flavors followed. Mac. APRS Win. APRS+ perl. APRS • XAPRS released as beta at 1999 Dayton Hamvention
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.
How do I view APRS?
Software • • • DOS APRS 847 Win. APRS and Mac. APRS 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 aprs. D 2. 1. 4 (APRS server software for Linux, no GUI)
OK, now how do I go mobile? • • • TNC route Mic-E route Pic-E route GPS receiver So you want to use a laptop?
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”
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 !!
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
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
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.
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.
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, Prop. Net • Send Weather related information • Earthquake origins • Create map overlays for specific points
Guy Story: W 8 XF baloon launch on 8. 3. 97. The X indicates max altitude achieved.
Digipeater does and don’ts
Other station tips • What is my tnc deviation? • The target is 3 k. Hz deviation, not too high or too low • TNC 2 clones and XR 2211 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
Credits • • • Bob Bruninga, WB 4 APR TAPR Mark, KB 2 ICI and Keith, WU 2 Z, Sproul Brent Hilderbrand, KH 2 Z Steve Dimse, K 4 HG Mike Musick, N 0 QBF Rich Perry, W 9 IF John Ackerman, N 8 UR Dale Huguley KG 5 QD
Missing Radio • Kenwood TH-D 7 • Owner is Russ Mc. Connel • Sebastian Florida • if found please see registration table