1 / 29

Vehicle Location / APRS

Explore the functionalities of Automatic Vehicle Location (AVL) and the basics of the Automatic Position Reporting System (APRS) utilized in commercial and amateur radio settings. Learn about GPS receivers, NMEA standard, APRS equipment, digipeaters, and more.

anissa
Download Presentation

Vehicle Location / APRS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Vehicle Location / APRS • What is AVL / APRS? • Automatic Vehicle Location • Automatic Position Reporting System • Commercial AVL – CES • APRS – Amateur Radio

  2. Vehicle Location / APRS • Vehicles Equipped with GPS Receiver • Mobile Sends GPS Location Data over RF Path • Fixed End Receives Location Data and Displays on Computer

  3. How does GPS work? http://www.colorado.edu/geography/gcraft/notes/gps/gps_f.html http://electronics.howstuffworks.com/gps.htm

  4. GPS Receivers • Handheld • Garmin • Magellan • Dedicated • Oncore • Receiver / Antenna Combos • Tripmate (Delorme) • Pharos • Tripnav

  5. GPS Receiver Output • Typical output is NMEA Standard (National Marine Electronics Association) • Various NMEA Messages containing: • Location • Speed • Altitude • Direction of Travel • Time • Validity of fix • DOP (accuracy of fix) • # Satellites tracked • Which Satellites are Being Tracked

  6. RMC Message • RMC - Recommended minimum specific GPS/Transit data • RMC,225446,A,4916.45,N,12311.12,W,000.5,054.7,191194,020.3,E*68 • 225446 Time of fix 22:54:46 UTC • A Navigation receiver warning A = OK, V = warning • 4916.45,N Latitude 49 deg. 16.45 min North • 12311.12,W Longitude 123 deg. 11.12 min West • 000.5 Speed over ground, Knots • 054.7 Course Made Good, True • 191194 Date of fix 19 November 1994 • 020.3,E Magnetic variation 20.3 deg East • *68 mandatory checksum

  7. Commercial AVL (CES)

  8. Commercial AVL Uses • Police • Taxis / Limos • Ready-mix Trucks • Delivery Trucks • Construction Equipment • Ambulances

  9. APRS – Basic TNC

  10. APRS Mobile Equipment • GPS Receiver • Anything that outputs NMEA data • APRS Capable TNC • KPC3, KPC3+ • Tiny Tracker • Mobile Radio • Any VHF Mobile

  11. APRS Base Equipment • Any TNC • Mobile Radio • Any VHF Mobile • Mapping Software • APRS + SA • WinAPRS • UIVIEW • DOS APRS

  12. Typical Screen ShotsAPRS + SA

  13. Typical Screen ShotsWinAPRS

  14. Typical Screen ShotsUIVIEW

  15. Typical Screen ShotsDOS APRS

  16. APRS Digipeaters Digipeater – Store & Forward Data Repeater RELAY – Typical home station. Lower ant height – smaller coverage area. Most home stations are set up as RELAY station. WIDE – Wide area coverage. Typically 100’ or higher tower Most WIDEs are set up as WIDE and RELAY. GATE – Digipeats from one band to another. Typically VHF to HF IGATE – Gateway from VHF to the internet.

  17. Area Digipeater Map

  18. APRS Digipeat Paths Typical mobile path : RELAY,WIDE,WIDE Do NOT use RELAY,RELAY! Typical Packet: K9SA-9>GPSMV V RELAY,WIDE,WIDE:$GPRMC, . . . . Typical fixed path: WIDE,WIDE Do NOT use RELAY,WIDE, WIDE (unless you are out of range of any WIDES) WideN-N 1st hop WIDE3-3 2nd hop WIDE3-2 3rd hop WIDE3-1 etc. Typical Packet: K9SA-9>GPSMV V WIDE3-3:$GPRMC, . . . .

  19. Digipeat Path

  20. Wide Area APRS (Worldwide) • Mobiles digipeat from VHF to IGATE • IGATE passes location data to internet APRS server • Server stores locations of ALL received APRS packets • Anyone worldwide can access this information • In some cases IGATES can digipeat from server to VHF

  21. Worldwide APRS • All APRS Programs can download from server to the • computer for display on a map. • Findu http://map.findu.com/k9mot • javAPRS http://www.aprs.net

  22. Typical findu Screen

  23. Typical findu Map

  24. Typical findu Map

  25. Findu Map of NW Suburbs

  26. Typical World findu Map

  27. ACME Mapper View

  28. APRS Uses • Public Service / Parades • Special Events • Balloon / Rocket Launches • Bike Rides • Round the World Flights • Shuttle / Satellite Tracking • Weather Tracking • Wife / Kid Tracker

  29. Weather Tracking

More Related