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TH4.T07: Special session on the great earthquake of East Japan on March 11, 2011
March 11th Japan Earthquake and Tsunami Beyond the Frontiers: What we observed by radar polarimetry
Motoyuki Sato
Si-we Chen Tohoku University
Tohoku University
Sendai International Center
Polarimetric SAR Image-Sendai
HH:R
HV:G
VV:B
Pi-SAR
(NICT)
0 1HHHH HV j HV
VH VV VH VV
S S Se
S S S S
S
Sendai-Natori
Pi-SAR2
(NICT) Mar
12th 2011
HH:R
HV:G
VV:B
Sendai-Natori
Pi-SAR2
(NICT)
Mar 18th 2011
HH:R
HV:G
VV:B
0 0.5 1 1.5 2 2.5 3-60
-50
-40
-30
-20
-10
0
10
20
Distance(km)
Ba
cksca
tte
red
Po
we
r(d
B)
HH
HV
VV
0 0.5 1 1.5 2 2.5 3-60
-50
-40
-30
-20
-10
0
10
20
Distance(km)
Ba
cksca
tte
red
Po
we
r(d
B)
HH
HV
VV
Mar 12th
, 2011
Mar 18th
, 2011,
Pauli Decomposition
1 0 1 0 0 1
0 1 0 1 1 0
HH HV
VH VV
S S
S S
2
HH VVS S
2
HH VVS S
HVS
Single
Bounce
Double
Bounce
Volumetric
Scattering
Single
Bounce
Double
Bounce
ALOS/PALSAR Pauli Decomposition
Ishinomaki-Onagawa
II
I
Slave
II
I
R:HH-VV,G:HV, B:HH+VV
Nov 21st, 2010. Apr 8th, 2011
Onagawa
Yamaguchi decomposition
dP
vP
sP
(red),
(green), and
(blue).
Nov 21st, 2010. Apr 8th, 2011
Pd(red), Pv (green),Ps (blue).
Cloude-Pottier decomposition Entropy
0
0.2
0.4
0.6
0.8
1
Nov 21st, 2010. Apr 8th, 2011
0 0.2 0.4 0.6 0.8 1
dP
vP
sP
(red),
(green), and
Jun 25th,2010 Apr 6th, 2011 Old Kitalami River
Yamaguchi
decomposition
Pd(red) Pv (green) Ps (blue)
Optical image
0 10 20 30 40 50 60 70 80 90(deg)
Entropy
Jun 25th,2010 Apr 6th, 2011,
日本地球惑星科学連合2008年大会
Polarization Orientation Angle
Induced by Ground Surface Patch
Jong-Sen Lee, Dale L. Schuler, et al.
Induced by Dihedral Structure Hiroshi Kimura, et al.
tantan
tan cos sin
Where tanω is the azimuth slope,
tanγ is the range slope, φ is the radar look angle.
tantan
cos
Where tanα is the target azimuth angle,
φ is the radar look angle.
The induced polarization orientation
angle shift θis represented,
Sendai (Pi-SAR)
L-band, HH-VV, 2HV, HH+VV
X-band, HH-VV, 2HV, HH+VV
Residential block
1250m*1250m Estimated PO Angle θ
Estimated PO Angle θ
Jun 25th,2010 Apr 6th, 2011 Ishinomaki
dP
vP (red),
(green), and
Polarization
orientation angle.
Optical images
Yamaguchi
decomposition
Pd(red), Pv (green) Ps (blue).
-40 -30 -20 -10 0 10 20 30 40 (deg)
ALOS/PALSAR
How Radar Polarimetry
can be used for detection
of Damaged Areas?
•Differential Time?
•Interferometry ?
•High Resolution?
