c. papadimitriou 1,2,g. balasis 1, i. a. daglis 2,1 r. haagmans 3 1 institute for astronomy,...
TRANSCRIPT
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VALIDATION OF THE SWARM LEVEL 1B DATA USING THE TIME-FREQUENCY ANALYSIS
TOOL.
C. Papadimitriou1,2,G. Balasis1, I. A. Daglis2,1
R. Haagmans3
1 Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Athens, Greece
2 Department of Physics, University of Athens, Athens, Greece
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Outline
ULF Waves (Pc3) TFA Tool Examples FTP Server & Products Methodology Validation Statistics
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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ULF Waves
Pulsation classes
Continuous pulsationsIrregular
pulsations
Pc 1 Pc 2 Pc 3 Pc 4 Pc 5 Pi 1 Pi 2
T [s] 0.2-5 5-1010-45
45-150
150-600
1-4040-150
f0.2-5
Hz
0.1-0.2 Hz
22-100 mHz
7-22 mHz
2-7 mHz
0.025-1 Hz
2-25 mHz
Compressional Pc 3 dayside upstream relate to wave-particle interaction in the foreshock and shock
Toroidal Pc 3 or multi-harmonics dayside upstream field line resonance harmonics in Pc 3 / Pc 4 range, compressional Pc3 as a driver (coupling with the fundamental toroidal mode)
http://magbase.rssi.ru/REFMAN/SPPHTEXT/ulf.html
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
Examples of TFA output(wave event)
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SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
Examples of TFA output(plasma instabilities)
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SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
Examples of TFA output(instrument differences)
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ftp Server @ IAASARS, NOA, GRip: 195.251.203.216
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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ftp Server @ IAASARS, NOA, GRip: 195.251.203.216
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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ftp Server @ IAASARS, NOA, GRip: 195.251.203.216
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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ftp Server @ IAASARS, NOA, GRip: 195.251.203.216
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Methodology Read Data (daily files) in a day-to-day basis
(+/- a few minutes to avoid edge effects)
Interpolate (small) gaps Filter (cutoff at 20 mHz) Wavelet Transform
(50 logarithmically spaced frequencies from 20 to 100 mHz)
Track Segmentation [-90, +90] degrees in Mag. Lat. Event Detection
Two - step thresholding Parameter Extraction Database Creation Post Processing
Balasis et al. 2013; Earth, Planets and Space
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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SH
UFFLED
SER
IES
MEAN + 3 ST.DEV
Ignoring largest 10%
points to minimize
spike influence
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Balasis et al. ULFwave activity during the 2003 Halloween superstorm: multipoint
observations fromCHAMP, Cluster and Geotail missions,Ann. Geophys., 30, 1751-1768, doi:10.5194/angeo-30-1751-2012
tpeak = 14:42 fpeak = 79 mHz
Δt ~ 23’
Powerpeak = 28 nT2/Hz
Max(|B|) = 5.45 nTMax(|ΔΒ|) = 2.73 nT/sec
roughness(n) ~ 5 103 cm-3 rMAG = (-7o, 40o, 401 km)
MLT = 13:06, Lshell(ONERA IRBEM LIB)
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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tpeak = 14:42 fpeak = 79 mHz
NOT AT THE EDGES
Δt ~ 23’Δt > 2 (1/fpeak)
Powerpeak = 28 nT2/HzEXCLUDE WEAK EVENTS
Max(|B|) = 5.45 nTMax(|ΔΒ|) = 2.73 nT/sec
REMOVE SPIKESMax(|ΔΒ|) vs Max(|B|)
roughness(n) ~ 5 103 cm-3 PLASMA INSTABILITIES
rMAG = (-7o, 40o, 401 km) MLT = 13:06
Balasis et al. ULFwave activity during the 2003 Halloween superstorm: multipoint
observations fromCHAMP, Cluster and Geotail missions,Ann. Geophys., 30, 1751-1768, doi:10.5194/angeo-30-1751-2012
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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tpeak = 14:42 fpeak = 79 mHz
NOT AT THE EDGES
Δt ~ 23’Δt > 2 (1/fpeak)
Powerpeak = 28 nT2/HzEXCLUDE WEAK EVENTS
Max(|B|) = 5.45 nTMax(|ΔΒ|) = 2.73 nT/sec
REMOVE SPIKESMax(|ΔΒ|) vs Max(|B|)
roughness(n) ~ 5 103 cm-3 PLASMA INSTABILITIES
rMAG = (-7o, 40o, 401 km) MLT = 13:06
Balasis et al. ULFwave activity during the 2003 Halloween superstorm: multipoint
observations fromCHAMP, Cluster and Geotail missions,Ann. Geophys., 30, 1751-1768, doi:10.5194/angeo-30-1751-2012
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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1 Hz magnetic field data (ASM scalar & magnitude of VFM vector)
2 Hz electron density data (from LP instrument)
Time span: 15th May 2014 – 15th Nov 2014
> 5,000 Tracks [-90, +90] degrees
~ 1,500 Wave Events per satellite Selected
Additional Data: OmniWeb Servicehttp://omniweb.gsfc.nasa.gov/
Dataset Description
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Overview (SWARM – B, ASM)
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Overview (SWARM – B, VFM)
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Overview (SWARM – A, ASM)
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Overview (SWARM – A, VFM)
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Overview (SWARM – C, ASM)
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Overview (SWARM – C, VFM)
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Statistical Distributions of Wave ParametersSWARM-B, ASM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Statistical Distributions of Wave ParametersSWARM-B, VFM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Statistical Distributions of Wave ParametersSWARM-A, ASM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Statistical Distributions of Wave ParametersSWARM-A, VFM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Statistical Distributions of Wave ParametersSWARM-C, ASM
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Statistical Distributions of Wave ParametersSWARM-C, VFM
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Positional Distributions of Wave ParametersSWARM-B, ASM
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Positional Distributions of Wave ParametersSWARM-B, VFM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Positional Distributions of Wave ParametersSWARM-A, ASM
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Positional Distributions of Wave ParametersSWARM-A, VFM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Positional Distributions of Wave ParametersSWARM-C, ASM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Positional Distributions of Wave ParametersSWARM-C, VFM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Positional Distributions of Wave ParametersCHAMP
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Wave Power MapsSWARM-B, ASM
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Wave Power MapsSWARM-B, VFM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Wave Power MapsSWARM-A, ASM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Wave Power MapsSWARM-A, VFM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Wave Power MapsSWARM-C, ASM
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Wave Power MapsSWARM-C, VFM
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Wave Power MapsCHAMP
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Seasonal VariationsSWARM-B, ASM
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Seasonal VariationsSWARM-B, VFM
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Seasonal VariationsSWARM-A, ASM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Seasonal VariationsSWARM-A, VFM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Seasonal VariationsSWARM-C, ASM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Seasonal VariationsSWARM-C, VFM
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Seasonal Variations
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam
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Summary
Automated Detection Methodology Statistics of Wave Parameters
Variations of Wave Parameters vs Time Comparison between Instruments Comparison between Satellites
Statistical Validity test (more data) Propagation/Polarization parameters
Combination of Satellites
SWARM 4th Data Quality Workshop, 2-5 Dec 2014, GFZ Potsdam