1. TH4.T07: Special session on the great earthquake of East
Japan on March 11, 2011

2. March 11th Japan Earthquake and Tsunami
Beyond the Frontiers:
What we observed by radar polarimetry
Motoyuki Sato
Si-we Chen
Tohoku University

3. Tohoku University

4. Sendai International Center

5. Polarimetric SAR Image-Sendai
 S HH S HV   1 S HV 
S    S  e
0 jHH
 
 VH SVV   SVH SVV 
Pi-SAR
(NICT)
HH:R
HV:G
VV:B

6. Sendai-
Natori

10. Sendai-Natori
Pi-SAR2
(NICT) Mar
12th 2011
HH:R
HV:G
VV:B

11. Pi-SAR2
(NICT)
Mar 18th 2011
HH:R
HV:G
VV:B

12. Mar 12th, 2011
20
Backscattered Power(dB)
10 HH
HV
0
VV
-10
-20
-30
-40
-50
-60
0 0.5 1 1.5 2 2.5 3
Distance(km)
Mar 18th, 2011,
20
HH
Backscattered Power(dB)
10
HV
0 VV
-10
-20
-30
-40
-50
-60
0 0.5 1 1.5 2 2.5 3
Distance(km)

13. Pauli Decomposition
 S HH S HV  1 0 1 0   0 1
        
 SVH SVV  0 1  0 1 1 0
Single Double Volumetric
Bounce Bounce Scattering
S HH  SVV
Single 
Bounce 2
S HH  SVV

Double 2
Bounce
  SHV

14. ALOS/PALSAR Pauli Decomposition
Ishinomaki-Onagawa
Slave
II II
I I
Nov 21st, 2010. Apr 8th, 2011
R:HH-VV,G:HV, B:HH+VV

15. Onagawa

16. Pd Yamaguchi decomposition
(red),
Pv
(green), and
Ps
Pd(red), Pv (green),Ps (blue).
(blue).
Nov 21st, 2010. Apr 8th, 2011

17. Cloude-Pottier decomposition Entropy
1
0.8
0.6
0.4
0.2
0
Nov 21st, 2010. Apr 8th, 2011

18. Jun 25th,2010 Apr 6th, 2011 Old Kitalami River
Pd
(red),
Pv
(green), and
Ps
Optical image
Yamaguchi
decomposition
Pd(red)
Pv (green)
Ps (blue)
0 0.2 0.4 0.6 0.8 1

19. Jun 25th,2010 Apr 6th, 2011,
0 10 20 30 40 50 60 70 80 90 (deg)
Entropy

22. Polarization Orientation Angle
Induced by Ground Surface Patch
Jong-Sen Lee, Dale L. Schuler, et al.
The induced polarization orientation
angle shift θis represented,
 tan 
tan  
 tan  cos   sin 
Where tanω is the azimuth slope,
tanγ is the range slope, φ is the radar look angle.
Induced by Dihedral Structure
Hiroshi Kimura, et al.
 tan 
tan  
cos 
Where tanα is the target azimuth angle,
φ is the radar look angle.

23. Sendai (Pi-SAR)
Residential block L-band, HH-VV, 2HV, HH+VV Estimated PO Angle θ
1250m*1250m X-band, HH-VV, 2HV, HH+VV Estimated PO Angle θ

27. Jun 25th,2010 Apr 6th, 2011 Ishinomaki
Pd
(red),
Pv
ALOS/PALSAR
(green), and
Optical images
Yamaguchi
decomposition
Pd(red),
Pv (green)
Ps (blue).
-40 -30 -20 -10 0 10 20 30 40 (deg)
Polarization
orientation angle.

28. How Radar Polarimetry
can be used for detection
of Damaged Areas?
•Differential Time?
•Interferometry ?
•High Resolution?