joint observation of large-scale travelling ionospheric disturbances using superdarn hokkaido radar...
TRANSCRIPT
Joint observation of large-scale travelling ionospheric disturbances using SuperDARN Hokkaido radar and Eastern Siberia chirp
sounders network
Alexey Oinats1, Konstantin Kutelev1, Vladimir Kurkin1, Nozomu Nishitani2
1Institute of Solar-Terrestrial Physics, Russia, 664033, Irkutsk, P.O. Box 291, E-mail: [email protected] 2Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan, E-mail: [email protected]
European Geosciences Union General Assembly 2011
Vienna | Austria | 03 – 08 April 2011
EGU GA, Vienna, April 2011
80 100 120 140 160 180L o n g itu d e (g e o g .)
40
45
50
55
60
65
70
La
titu
de
(g
eo
g.)
H okka ido143.6oE43.5oN
Irkutsk104.0oE52.5oN
N orilsk88.1oE69.4oN
M agadan151.0oE60.1oN
beam 15
beam
0
125.0oE
58.5oN
98 .2oE
61.2oN
Scheme of the instruments location
Chirp oblique incidence sounder data DPS-4 vertical sounder data
MOFMaximal
ObservableFrequency
Time resolution - 5 min Time resolution – 15 min
foF2Critical
Frequency ofF2 layer
hmF2Peak
Height ofF2 layer
EGU GA, Vienna, April 2011
[B.W. Reinisch, D.M. Haines, K. Bibl et al. 1997]
[V.A. Ivanov, V.I. Kurkin, V.E. Nosov et al., 2003]
EGU GA, Vienna, April 2011
80 100 120 140 160 180L o n g itu d e (g e o g .)
40
45
50
55
60
65
70
La
titu
de
(g
eo
g.)
H okka ido143.6oE43.5oN
Irkutsk104.0oE52.5oN
N orilsk88.1oE69.4oN
M agadan151.0oE60.1oN
beam 15
beam
0
125.0oE
58.5oN
98 .2oE
61.2oN
Scheme of the instruments location
SuperDARN HF radar data
17 17.125 17.25 17.375 17.5 17.625 17.75 17.875 18 18.125 18.25 18.375 18.5 18.625 18.75 18.875 190
1000
2000
3000
17 17.125 17.25 17.375 17.5 17.625 17.75 17.875 18 18.125 18.25 18.375 18.5 18.625 18.75 18.875 190
1000
2000
3000
16 16.125 16.25 16.375 16.5 16.625 16.75 16.875 17 17.125 17.25 17.375 17.5 17.625 17.75 17.875 18 18.125 18.25 18.375 18.5 18.625 18.75 18.875 190
1000
2000
3000
Beam 0
Beam 3
Beam 6
0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 21 0
SuperDARN Hokkaido radar. March 16-18, 2007
Time resolution for the beam ~ 1 min
EGU GA, Vienna, April 2011
Chirp oblique incidence sounding andvertical sounding
Ground backscatter sounding at fixed frequency (SuperDARN)
RTI plot for beam 0 (Hok)MOF for Magadan - Irkutsk
EGU GA, Vienna, April 2011
0 3 6 9 12 15 18 21 241000
1250
1500
1750
2000
0 3 6 9 1 2 1 5 1 8 2 16
9
1 2
1 5
1 8
MOF, MHz
UT
P, km
UT
Simulation for undisturbed conditions (IRI 2007)
Chirp oblique incidence sounding andvertical sounding
Ground backscatter sounding at fixed frequency (SuperDARN)
0 3 6 9 12 15 18 21 241000
1250
1500
1750
2000
RTI plot for beam 0 (Hok)
0 3 6 9 1 2 1 5 1 8 2 16
9
1 2
1 5
1 8
MOF for Magadan - IrkutskSimulation for southward LSTID (160o, 1500km, 2.5 h, 10%)
EGU GA, Vienna, April 2011
MOF, MHz
UT
P, km
UT
Pmin
ground backscatter leading edge(minimal group path)
SuperDARN HF radar data
17 17.125 17.25 17.375 17.5 17.625 17.75 17.875 18 18.125 18.25 18.375 18.5 18.625 18.75 18.875 190
1000
2000
3000
17 17.125 17.25 17.375 17.5 17.625 17.75 17.875 18 18.125 18.25 18.375 18.5 18.625 18.75 18.875 190
1000
2000
3000
16 16.125 16.25 16.375 16.5 16.625 16.75 16.875 17 17.125 17.25 17.375 17.5 17.625 17.75 17.875 18 18.125 18.25 18.375 18.5 18.625 18.75 18.875 190
1000
2000
3000
Beam 0
Beam 3
Beam 6
0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 21 0
SuperDARN Hokkaido radar. March 16-18, 2007
EGU GA, Vienna, April 2011
[T.J.T. Karhunen, T.R. Robinson, N.F. Arnold , M.
Lester, 2006]
500
1000
1500
2000
2500
t ime , UT
0
4
8
12
16
20 MOF, MH z
2
4
6
8
10
foF2, MH z
200
240
280
320
360hm F2, kmP, km
Mag-Irk
Nor-Irk
Irk
17 20 23 2 5 8 10 14 17
Observational data during March 17, 2007
EGU GA, Vienna, April 2011
Correlation between variations of obtained parameters during March 17, 2007
EGU GA, Vienna, April 2011
-2
0
2
4
16 18 20 22 24 26 28 30 32 34 36 38-4
-2
0
2
4
-1.0
-0.8
-0.6
-0.4
-0.2
-0.0
0.2
0.4
0.6
0.8
1.0
foF2(Irk) vs MOF(Nor-Irk)
foF2(Irk) vs MOF(Mag-Irk)
-2
-1
0
1
2
3hmF2(Irk) vs minimal group path (Hok)
-2
0
2
4MOF(Nor-Irk) vs MOF(Mag-Irk)
17.03.200716.03.2007
hours after 0UT 16.03.2007
tim
e sh
ift,
ho
urs
21 22 23 24 1 2 3 4 5 6 7time , UT
0
500
1000
1500
P, km
15
0
5
10
1
4
3
2
The absolute deviations of the minimal group path for all 16 beams of the SuperDARN Hokkaido radar on March 17, 2007
EGU GA, Vienna, April 2011
)exp( trkiA
1k
xy kk
)())((1
12 ijijijij ttyyxx
),())((1
12
jiijijij tyyxxtt
15
,0
2)),((),(ijj
jiji tt
Phase difference between two detectors:
Time moment for j-th detector:
Discrepancy between theoretical and measured time moments
Let assume
Determination of the TID parameters using the SuperDARN ground scatter
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15beam num ber
-3000
-2000
-1000
0 t, s
142 144 146 148 150 152Long itude, deg.
42
44
46
48
50
Latit
ude,
de
g.
H ok
0 5
10
15
Determination of the TID parameters using the SuperDARN ground scatter
TID (0.7UT )
EGU GA, Vienna, April 2011
Instrument RCSN SuperDARN
Time, UT 23UT 2UT 23UT (N1) 0.7UT (N2)
Azimuth, deg. 240 220 160 153
Velocity, m/s 190 152 190 189
Possible source of the TID
EGU GA, Vienna, April 2011
0
1 0
2 0
3 0a p
0 3 6 9 1 2 1 5 1 8 2 1 0 3 6 9 1 2 1 5 1 8 2 1 0 3 6 9 1 2 1 5 1 8 2 1U T
Kp=4
16.03.2007 17.03.2007 18.03.2007
Conclusion
Large-scale travelling ionospheric disturbance was observed at the same time by SuperDARN Hokkiado radar and by East-Siberian chirp sounders network on March 17, 2007.
TID mostly propagates in southward direction that is typical for midlatitudes (T~2.5-3 h, ~1700-2000 km, ~190 m/s). The comparison between the two instruments shows a good agreement in estimated TID`s parameters. The possible source of the TID is an area at the boundary of the auroral oval.
The joint use of the SuperDARN Hokkaido HF radar and Russian chirp sounders network data allows to take more information about large-scale TID`s propagating in the Asia north-east. Future expansion of chirp sounders network and also installation of Russian segment SuperDARN radars will allow more possibilities in diagnostics of TIDs and identification their sources.
EGU GA, Vienna, April 2011
Nearest future: Chirp sounders network expansion
EGU GA, Vienna, April 2011
Nearest future: Russian segment of SuperDARN
EGU GA, Vienna, April 2011
Thank you for attention!
Institute of Solar-Terrestrial Physics, Russia
Solar-Terrestrial Environment Laboratory,
Nagoya University, Nagoya, Japan