plasmapause detection by means of a meridional magnetometer array balázs heilig, ggih, tihany,...
TRANSCRIPT
Plasmapause detection by means of a meridional magnetometer array
Balázs HEILIG, GGIH, Tihany, HungaryMassimo VELLANTE, University Of L'Aquila, L'Aquila, Italy
Anders JORGENSEN, New Mexico, USAJános LICHTENBERGER, Eötvös University, Budapest, Hungary
Jan REDA, Geophysical Institute of PAS, Warsaw, PolandMauro REGI, University Of L'Aquila, L'Aquila, Italy
Gergely VADÁSZ, GGIH, Budapest, HungaryAndrás CSONTOS, GGIH, Tihany, Hungary
ESWW 10, Antwerp, Belgium, 22 November, 2013
PLASMON
Outline
Introduction
1) Plasmapause detection by ground magnetometer arrays (case study) a) from density (FLR frequency) profile b) from cross phase reversal c) from sudden changes in density
2) Validation using Van Allen Probes EMFISIS in-situ observations
Future plans, conclusions
ESWW 10, Antwerp, Belgium, 22 November, 2013
Ground observation of ULF waves
PLASMON EU FP7 263618EMMA (European quasi-Meridional Magnetometer Array) 2012: MM100 + SEGMA
OUJ-HAN L = 4.1FLRID: finding the resonance frequency
FLRINV: InversionFLR frequency --> plasma mass density
cross phase
amplituderatio
ESWW 10, Antwerp, Belgium, 22 November, 2013
Waters et al., 1991; Berube et al., 2003
Guglielmi, 1989
Gradient-method (Baransky et al. 1985 Waters et al. 1991)0 20 40 60 80 100
0.6
0.8
1
1.2
1.4
frekvencia [mHz]
am
plit
úd
ó a
rán
y
0 20 40 60 80 1000
20
40
60
frekvencia [mHz]
fázi
sk
ülö
nb
sé
g [
°]
Geomagnetic Field Line Resonances
amplitude ratio ~ 1
phase diff. maximum
Menk et al., 2004
FLRID (for PLASMON EMMA)
OUJ-HAN L = 4.1
FLRID: finding the resonance frequency
cross phase
amplituderatio
FLRID uses both cross phase and amplitude information to detect FLRS
FLRID checks for amplitude ratio (value and trend)
FLRID detects both cross phase maxima and minima
ESWW 10, Antwerp, Belgium, 22 November, 2013
EMMA: plasmapause observationsCase study: 28 Sep – 15 Oct, 2012
ESWW 10, Antwerp, Belgium, 22 November, 2013
BRZ-SUWL = 2.6
BEL-ZAGL = 2.2
HAN-NURL = 3.6
NUR-TARL = 3.2
TAR-BRZL = 2.9
OUJ-HANL = 4.1
SOD-OUJL = 4.9
KEV-IVAL = 6.1
PP position from equatorial density profiles
15 October, 2012
2 3 4 5 6-1
0
1
2
3
4E M M A 1 5 O c t 2 0 1 2 , 0 8 :0 0 -0 9 :0 0
L [RE
]lo
g (
eq) [
cm-3
]
2 3 4 5 6-1
0
1
2
3
L [RE
]
log
(eq
) /
L
PP position from equatorial density profiles
2 3 4 5 6-1
0
1
2
3
4E M M A 1 5 O c t 2 0 1 2 , 0 8 :0 0 -0 9 :0 0
L [RE
]
log
(eq
) [cm
-3]
2 3 4 5 6-1
0
1
2
3
L [RE
]
log
(eq
) /
L
2 3 4 5 6-1
0
1
2
3
4E M M A 3 O c t 2 0 1 2 , 0 8 :0 0 -0 9 :0 0
L [RE
]
log
(eq
) [cm
-3]
2 3 4 5 6-1
0
1
2
3
L [RE
]
log
(eq
) /
L 2 3 4 5 6-1
0
1
2
3
4E M M A 1 0 O c t 2 0 1 2 , 0 8 :0 0 -0 9 :0 0
L [RE
]
log
(eq
) [cm
-3]
2 3 4 5 6-1
0
1
2
3
L [RE
]
log
(eq
) /
L
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5-1
0
1
2
3
4E M M A 2 O c t 2 0 1 2 , 1 0 :0 0 -1 3 :0 0
L [RE
]
log
(eq
) [cm
-3]
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5-1
0
1
2
3
L [RE
]
log
(eq
) /
L
Empirical models for comparison:1) PP from CHAMP msFAC observations
Launch : 15 June, 2000
End of mission: 19 Sept, 2010
Orbit: polar orbit (i=87.3°)
Initial altitude: 454 km
Orbital period: 93.55 min
Orbital speed: 7.6 km/s
Drift in LT: 5.5 min/day
Heilig and Lühr., AnGeo, 2013
msFAC boundary as a function of Kp and MLT
New empirical PP model based on FAC observations
ESWW 10, Antwerp, Belgium, 22 November, 2013
272 274 276 278 280 282 284 286 288 2901.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5EMMA and VAP PP 28 Sep - 15 Oct, 2012
DOY 2012
L[RE]
HL
272 274 276 278 280 282 284 286 288 290-150
-100
-50
0
50
DoY 2012
Dst [n
T]
PPCH2012
OM2003
130 131 132 133 134 135 136 1370
2
4
6
DoY 2012
Kp
HAN-NURL = 3.6
NUR-TARL = 3.2
TAR-BRZL = 2.9
PP position from phase reversals
Milling, Mann and Menk, GRL, 2001
272 274 276 278 280 282 284 286 288 2901.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5EMMA and VAP PP 28 Sep - 15 Oct, 2012
DOY 2012
L[RE]
PP position from FLRsSummary
vPP from phase reversals
HAN-NURL = 3.6
NUR-TARL = 3.2
TAR-BRZL = 2.9
OUJ-HANL = 4.1
BRZ-SUWL = 2.6
15 October 201213 October 2012
PP position from abrupt changes of density
286 286.5 287 287.5 288 288.5 289 289.5 2902
2.5
3
3.5
4
4.5
5
5.5EMMA and VAP PP 28 Sep - 15 Oct, 2012
DOY 2012
L[R
E]
PP position from abrupt changes of density
c PP from abrupt density changes
272 274 276 278 280 282 284 286 288 2901.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5EMMA and VAP PP 28 Sep - 15 Oct, 2012
DOY 2012
L[RE]
PP position from FLRsSummary
Validation using in-situPP-crossings
ESWW 10, Antwerp, Belgium, 22 November, 2013
Van Allen ProbesComparison with in-situ PP observations
EMFISIS: Electric and Magnetic Field Instrument Suite and Integrated Science
VAP A 15 Oct, 2012 02:00-08:00 UTMagnetic footprint
VAP Science Gateway, Magnetic Footprint tool (http://athena.jhuapl.edu/)
Van Allen Probes
ESWW 10, Antwerp, Belgium, 22 November, 2013
272 274 276 278 280 282 284 286 288 2901.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5EMMA and VAP PP 28 Sep - 15 Oct, 2012
DOY 2012
L[RE]
Van Allen ProbesComparison with in-situ PP observations
272 274 276 278 280 282 284 286 288 2901.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5EMMA and VAP PP 28 Sep - 15 Oct, 2012
DOY 2012
L[RE]
Van Allen ProbesComparison with in-situ PP observations
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5-1
0
1
2
3
4E M M A 2 O c t 2 0 1 2 , 1 0 :0 0 -1 3 :0 0
L [RE
]
log
(eq
) [cm
-3]
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5-1
0
1
2
3
L [RE
]
log
(eq
) /
L
Summary and future work
Daytime PP can be succesfully detected automatically by a ground-based magnetometer array
PP observations of EMMA are consistent with VAPs' in-situ observation
It would be desirable to increase the density of EMMA near L = 4
New satellite missions (Van Allen Probes, SWARM) yield a unique opportunity to validate/compare ground based methods and the empirical PPCH2012 model
ESWW 10, Antwerp, Belgium, 22 November, 2013
The research leading to these results has received funding from the European Community’s Seventh Framework Programme ([FP7/2007–2013]) under grant agreement number 263218.
Thank you for the attention!
SWARM launch today at 12:02 GMT!
3 CHAMP-like satellites 2 side-by-side with slowly changing separation 1 above them (different orbital plane)
5 November, 2013, Plesetsk, Russia