lightning detection and localization using extended kalman filter
DESCRIPTION
National Engeneering School of Tunis. Lightning detection and localization using extended Kalman filter. Ines Ben Saïd U2S(ENIT) SYS’COM Master 2008-2009. U2S. References. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/1.jpg)
Lightning detection Lightning detection and localization using extended and localization using extended
Kalman filterKalman filter
Ines Ben SaïdInes Ben SaïdU2S(ENIT) U2S(ENIT)
SYS’COM Master SYS’COM Master 2008-20092008-2009
National Engeneering School of Tunis
![Page 2: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/2.jpg)
22
ReferencesReferences
1 - 1 - T. G. Wood, Geo-location of individual lightning discharges using impul-
sive vlf electromagnetic waveforms, Phd thesis, The department of electrical
engineering and the committee on graduate studies of stanford university, De-
cember 2004.
2 - 2 - S. A. Cummer, Lightning and ionospheric remote sensing using vlf/elf radio
atmospherics, Phd thesis, The department of electrical engineering and the
committee on graduate studies of stanford university, August 1997.
3 - 3 - R. E. Kalman, A new approach to linear filtering and prediction problems,
Transaction of the ASME Journal of Basic Engineering, (pp. 35{45), March
1960.
![Page 3: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/3.jpg)
33
Lightning DetectionLightning DetectionEarth+ Ionosphere = waveguide[ELF-VLF] = [300Hz-30KHz] [ELF-VLF] = [300Hz-30KHz]
radio atmospherics (‘sferic’) = Waves that propagates in the ELF/VLF band with low attenuation (~3dB/1000Km)
Lightning detection via VLF data analyses
Receivers
Transmitters
![Page 4: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/4.jpg)
44
VLF receiver at LSAMAVLF receiver at LSAMA
Hardware Software
![Page 5: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/5.jpg)
55
VLF receiver schemaVLF receiver schema
Two data types: - narrow band
- broad band
A/D
Converter
![Page 6: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/6.jpg)
66
Broad band signalsBroad band signals
transmitters
sferic
![Page 7: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/7.jpg)
77
Sferic caracteristicsSferic caracteristics
Much of the sferic energy lies in [5KHz-15KHz] band (Much of the sferic energy lies in [5KHz-15KHz] band (Cummer 2004 Cummer 2004 )) Duration ~4ms: - ~ 1ms VLF impulseDuration ~4ms: - ~ 1ms VLF impulse - ~ 3ms ELF slow tail- ~ 3ms ELF slow tail
(Cummer 2004 )(Cummer 2004 )
![Page 8: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/8.jpg)
88
Sferics detection methodSferics detection method
Identification Two successif instants must be separated with an delay >= 4ms (sferic duration) Determinate the simultaneous instants for the N/S and E/W signals.
Proposed procedure N = 60000 samples
Te = 100KHz
![Page 9: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/9.jpg)
99
Lightning localizationLightning localizationIMPACTIMPACT
Tow receivers are sufficientTow receivers are sufficientPrecision depend on optimization methodPrecision depend on optimization method
![Page 10: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/10.jpg)
1010
Lightning localizationLightning localization
Arrival azimuth calculation Arrival azimuth calculation
![Page 11: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/11.jpg)
1111
TriangulationTriangulation
![Page 12: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/12.jpg)
1212
Results and limitesResults and limites
IMPACT method tested by simulation
Source [45°N 60°E]1st receiver : Vieques 2nd receiver : Palmer
![Page 13: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/13.jpg)
1313
Proposed method: Extended Kalman filterProposed method: Extended Kalman filter
Observation
State
Interest : non linear optimization used in GPS localization
State representation
![Page 14: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/14.jpg)
1414
AlgorithmAlgorithm
Initialisation Initialisation
PredictionPrediction
CorrectionCorrection
![Page 15: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/15.jpg)
1515
Simulation resultsSimulation results
Source P1 [45°N 60°E]1st receiver A: Vieques 2nd receiver B: Palmer
Estimated position
![Page 16: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/16.jpg)
1616
Simulations resultsSimulations results
Real Source [45°N 60°E]1st receiver A: Vieques 2nd receiver B: PalmerAzimuth error 1°;Time difference Error 0.1ms Estimated
position
Real source
![Page 17: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/17.jpg)
1717
Real dataReal data
![Page 18: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/18.jpg)
1818
Real data localization Real data localization
Source localized in the triangle using the two methods
A difference of ~200Km between the two methods
Alger
Iso time difference
Extended kalman filter
Iso time difference
Alger
Researsh zone
![Page 19: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/19.jpg)
1919
Conclusion and perspectiveConclusion and perspective
Automatic method for sferic detectionAutomatic method for sferic detection
Localization using extended Kalman filter Localization using extended Kalman filter
Introduction of signal dynamic in physics Introduction of signal dynamic in physics problemsproblems
Test of other optimization methodsTest of other optimization methods
![Page 20: Lightning detection and localization using extended Kalman filter](https://reader035.vdocuments.net/reader035/viewer/2022062409/56814e32550346895dbb986b/html5/thumbnails/20.jpg)