POLARIMETRIC OBSERVATION FOR RICE FIELD BY RADARSAT-2 AND ALOS/PALSAR<br />Chinatsu YONEZAWA1) ,Takahiro IMAI1) , Daisuke ...
Introduction<br />Rice Field Monitoring by <br />Multi-temporal Space-borne <br />Full Polarimetric SAR<br />  Full Polari...
Full Polarimetry  ~Three component decomposition~<br />Surface<br />Double Bounce<br />Volume<br /> (Freeman and Durden (1...
Full Polarimetry  ~H-a -A decomposition ~<br /><ul><li>Entropy</li></ul>  Randomness of the scattering<br /><ul><li>Anisot...
ALOS PALSAR<br />Study Area<br />Area 1<br />Area 2<br />1km<br />
ALOS PALSAR<br />Full polarimetric data<br />©MDA<br />1km<br />
ALOS PALSAR<br />3km<br />Three Component Decomposition<br />             27AUG06                      12OCT06  <br />3km<...
ALOS PALSAR<br />Three Component Decomposition<br />Surface<br />©MDA<br />Volume<br />Double bounce<br />24-Aug-08<br />2...
ALOS PALSAR<br />H-a-ADecomposition<br />Area 1<br />Area 2<br />Entropy<br />©MDA<br />Alpha<br />Anisotropy<br />24-Aug-...
ALOS PALSAR<br /><ul><li>Three component decomposition:</li></ul>     Main scattering component of rice field <br />      ...
RADARSAT-2<br />Test Site<br />©MDA<br />Rice field<br />1km<br />
RADARSAT-2<br />Data<br />Full Polarization<br /> Fine QP  (incidence angle 20.1°Des.) resolution: 11×9m<br />29-Jun-09<br...
RADARSAT-2   <br />3km<br />Three Component Decomposition<br />             29JUN09                        23JUL09  <br />...
RADARSAT-2<br />Three Component Decomposition<br />©MDA<br />Surface<br />Volume<br />Double bounce<br />1km<br />
Three Component Decomposition<br />RADARSAT-2<br />ALOS PALSAR<br />Surface<br />Volume<br />Double bounce<br />Double bou...
RADARSAT-2<br />H-a-A decomposition<br />50<br />40<br />30<br />20<br />0.7<br />0.6<br />0.5<br />0.4<br />Entropy<br />...
H-a-A decomposition<br />RADARSAT-2<br />ALOS PALSAR<br />50<br />40<br />30<br />20<br />Alpha<br />Alpha<br />29Jun-09<b...
RADARSAT-2<br /><ul><li>Three component decomposition:</li></ul>     Volume scattering component ratio<br />         – Use...
Summary<br />◆PALSAR(L-band) and RADARSAT-2(C-band) <br />    ⇒rice grain filling season<br /><ul><li>Main scattering comp...
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  1. 1. POLARIMETRIC OBSERVATION FOR RICE FIELD BY RADARSAT-2 AND ALOS/PALSAR<br />Chinatsu YONEZAWA1) ,Takahiro IMAI1) , Daisuke KUNII1) , Manabu WATANABE 2) and Genya SAITO3)<br />1)Tohoku University, 2)JAXA, 3)Tokyo Institute of Technology<br />
  2. 2. Introduction<br />Rice Field Monitoring by <br />Multi-temporal Space-borne <br />Full Polarimetric SAR<br /> Full Polarimetric SAR<br /> :scattering characteristics<br /> ALOS PALSAR  L-band <br /> RADARSAT-2   C-band<br />  ・ Three component decomposition<br />  ・H-a-A decomposition  <br />  <br />
  3. 3. Full Polarimetry  ~Three component decomposition~<br />Surface<br />Double Bounce<br />Volume<br /> (Freeman and Durden (1998))<br />
  4. 4. Full Polarimetry  ~H-a -A decomposition ~<br /><ul><li>Entropy</li></ul>  Randomness of the scattering<br /><ul><li>Anisotropy</li></ul>  Relative scattering of the second and the third eigenvalues<br /><ul><li>Alpha</li></ul>  Indicator of the type of scattering mechanism<br />  0°:plane45°:dipole 90°:dihedral corner reflector<br /> (Cloude and Pottier(1996, 1997))<br />
  5. 5. ALOS PALSAR<br />Study Area<br />Area 1<br />Area 2<br />1km<br />
  6. 6. ALOS PALSAR<br />Full polarimetric data<br />©MDA<br />1km<br />
  7. 7. ALOS PALSAR<br />3km<br />Three Component Decomposition<br /> 27AUG06 12OCT06  <br />3km<br /> 18MAY06 24AUG08  <br />  <br />  <br />R:Double Bounce<br />G:Volume<br />B:Surface<br />  <br />
  8. 8. ALOS PALSAR<br />Three Component Decomposition<br />Surface<br />©MDA<br />Volume<br />Double bounce<br />24-Aug-08<br />27-Aug-06<br />27-Aug-09<br />A<br />A<br />A<br />D<br />D<br />A<br />D<br />D<br />A<br />D<br />A<br />1km<br />
  9. 9. ALOS PALSAR<br />H-a-ADecomposition<br />Area 1<br />Area 2<br />Entropy<br />©MDA<br />Alpha<br />Anisotropy<br />24-Aug-08<br />27-Aug-06<br />27-Aug-09<br />
  10. 10. ALOS PALSAR<br /><ul><li>Three component decomposition:</li></ul> Main scattering component of rice field <br /> :Grain filling season - Double bounce scattering<br /> :Harvested ~ Transplanting season - Surface scattering <br /><ul><li>H-a-A decomposition:</li></ul>Alpha angle <br /> -relationship with rice filed condition <br />
  11. 11. RADARSAT-2<br />Test Site<br />©MDA<br />Rice field<br />1km<br />
  12. 12. RADARSAT-2<br />Data<br />Full Polarization<br /> Fine QP  (incidence angle 20.1°Des.) resolution: 11×9m<br />29-Jun-09<br />23-Jul-09 <br />16-Aug-09<br />9-Sep-09    <br />©MDA<br />
  13. 13. RADARSAT-2   <br />3km<br />Three Component Decomposition<br /> 29JUN09 23JUL09  <br />3km<br /> 16AUG09 9SEP09  <br />  <br />  <br />R:Double Bounce<br />G:Volume<br />B:Surface<br />  <br />
  14. 14. RADARSAT-2<br />Three Component Decomposition<br />©MDA<br />Surface<br />Volume<br />Double bounce<br />1km<br />
  15. 15. Three Component Decomposition<br />RADARSAT-2<br />ALOS PALSAR<br />Surface<br />Volume<br />Double bounce<br />Double bounce scattering<br />Volume scattering<br />©MDA<br />Dominant scattering component on grain filling season <br />1km<br />
  16. 16. RADARSAT-2<br />H-a-A decomposition<br />50<br />40<br />30<br />20<br />0.7<br />0.6<br />0.5<br />0.4<br />Entropy<br />Alpha<br />29Jun-09<br />23-Jul-09 <br />9-Sep-09 <br />29Jun-09<br />23-Jul-09 <br />9-Sep-09 <br />16-Aug-09<br />16-Aug-09<br />0.7<br />0.6<br />0.5<br />0.4<br />Anisotropy<br />29Jun-09<br />23-Jul-09 <br />9-Sep-09 <br />16-Aug-09<br />
  17. 17. H-a-A decomposition<br />RADARSAT-2<br />ALOS PALSAR<br />50<br />40<br />30<br />20<br />Alpha<br />Alpha<br />29Jun-09<br />23-Jul-09 <br />9-Sep-09 <br />16-Aug-09<br />0.7<br />0.6<br />0.5<br />0.4<br />Anisotropy<br />Anisotropy<br />29Jun-09<br />23-Jul-09 <br />9-Sep-09 <br />16-Aug-09<br />
  18. 18. RADARSAT-2<br /><ul><li>Three component decomposition:</li></ul> Volume scattering component ratio<br /> – Useful to estimate rice growing process<br /><ul><li>H-a-A decomposition:</li></ul>Alpha angle<br />– Increasing with growth<br />©MDA<br />1km<br />
  19. 19. Summary<br />◆PALSAR(L-band) and RADARSAT-2(C-band) <br />    ⇒rice grain filling season<br /><ul><li>Main scattering component on three component decomposition</li></ul> PALSAR: double bounce scattering<br /> RADARSAT-2: volume scattering<br />    ⇒scattering mechanism difference<br /> L-band transmit paddy rice field <br />★H-a-A decomposition <br />PALSAR, RADARSAT-2: <br /> Entropy: 0.5~0.6 Alpha: 40 ~ 50 °Anisotropy: 0.6~0.7<br />
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