J-Fall 2014: Decoding the airspace above you with Java and $7 hardware
1 like1,067 views
Github repository with example code: http://github.com/bertjan/java-adsb-receiver
J-Fall 2014: Decoding the airspace above you with Java and $7 hardware
- 1. Decoding the airspace above you with Java and $7 hardware Bert Jan Schrijver bertjan@jpoint.nl @bjschrijver
- 2. Outline • Background • Software Defined Radio • About ADS-B • Decoding ADS-B • Demo @bjschrijver
- 3. TL;DR • Now -> planes & Java • Afterwards -> free beer (at the bar) @bjschrijver
- 4. How it all started… @bjschrijver
- 5. Software Defined Radio • Radio communication system • Components implemented in software • Cheap DVB-T with RTL2832U chip ($7) • Hence: RTL-SDR • Details on www.rtl-sdr.com @bjschrijver
- 6. Software Defined Radio @bjschrijver Demo
- 7. So how about Java? @bjschrijver
- 8. Java and RTL-SDR • RTL_TCP: Provides socket for RTL-SDR device • Java can connect, set frequency and stream data • Decode data signal in Java • First try: AIS (ship traffic) • First tries never succeed… @bjschrijver
- 9. ADS-B • Automatic Dependent Surveillance Broadcast • Monitoring and collision avoidance • Installed on all airliners • Reports identity, position and more • Part of US and EU regulation @bjschrijver
- 10. ADS-B @bjschrijver Source: simflight.nl
- 11. Java and ADS-B • Java connects to RTL_TCP socket • But now what? • No open source Java decoders available • No other option than to write own decoder… or is there? @bjschrijver
- 12. (insert legal notice here) @bjschrijver
- 13. How stuff works @bjschrijver
- 15. How stuff works @bjschrijver
- 16. That’s cool, but… • In-house reception is sub-optimal • Always-on service would be nice • Laptop needed for work now and then @bjschrijver
- 18. We love data • Keep system running for a while • Nicely stocked MongoDB • Now what? • Visualize it! @bjschrijver
- 20. 1 hour of data @bjschrijver
- 27. Thanks for your time! Please care about conference quality.
- 28. Liked it? Tweet it! @bjschrijver bertjan@jpoint.nl