wide area multilateration demonstration system rudolf seller, Ádám szüllő budapest university of...
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![Page 1: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/1.jpg)
Wide Area Multilateration Demonstration System
Rudolf Seller, Ádám Szüllő
Budapest University of Technology and Economics
Radar Research Group
![Page 2: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/2.jpg)
WAMLAT
• Passive distributed radar system to improve ATC reliability
• Wide-area coverage (>10km diameter)• Multiple receivers• Synchronization challenge• GPS based synchronization
Radar Research Group
![Page 3: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/3.jpg)
WAMLAT System
• GPS based synchronization• Data transfer via Ethernet• Server
Radar Research Group
![Page 4: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/4.jpg)
Geometry of the Receivers
• Multilateration is nonlinear• Location dependent position
estimation accuracy• Zone defined
by the receivers
Radar Research Group
![Page 5: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/5.jpg)
Synchronization
• GPS Disciplined Oscillator (GPSDO)• No physical clock distribution network• Tens of nanosecond accuracy
• Long term time difference measurement between two GPSDOs:
Radar Research Group
![Page 6: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/6.jpg)
Arrangement of the Receivers
• Across and around the city of Budapest• Not optimal geometry
Radar Research Group
![Page 7: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/7.jpg)
Results
• Persistent displaying• Fligth information from http://www.flightradar24.com
Radar Research Group
![Page 8: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/8.jpg)
Results
• Mode A and Mode C based multilateration has high false detection rate
Radar Research Group
![Page 9: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/9.jpg)
Results
• Only Mode S based multilateration
Radar Research Group
![Page 10: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/10.jpg)
Results
• „Invisible” aircraft
Radar Research Group
![Page 11: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/11.jpg)
Location dependent accuracy
• Multilateration is nonlinear
Radar Research Group
![Page 12: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/12.jpg)
Accuracy of the system
• Multilateration compared to ADS-B• ADS-B accuracy is questionable
(eg. systematic error because of delay)• Accuracy estimation based
on longterm dataset• Median error is 128 meters• Estimated accuracy is
150 meters
Radar Research Group
![Page 13: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/13.jpg)
Future work
• Develope tracking algorithm
• Expand the system nation-wide
Radar Research Group
![Page 14: Wide Area Multilateration Demonstration System Rudolf Seller, Ádám Szüllő Budapest University of Technology and Economics Radar Research Group](https://reader036.vdocument.in/reader036/viewer/2022070413/5697bfef1a28abf838cba19a/html5/thumbnails/14.jpg)
Thank You!
Radar Research Group