IEEE IGARSS Vancouver, July 27, 2011 TEST OF EQUI-SCATTERING MECHANISMS FOR POLINSAR APPLICATIONS WITH TANDEM-X Armando Marino Juan M. Lopez-Sanchez University Institute of Computing Research (IUII) University of Alicante Spain Shane R. Cloude AEL Consultants Cupar Scotland

IEEE IGARSS Vancouver, July 27, 2011 Motivations  TanDEM-X has a small bistatic angle  We are interested in knowing if this bistaic angle can change significantly the scattering mechanisms. Courtesy of DLR

IEEE IGARSS Vancouver, July 27, 2011 Outlook  Development of an Equi-Scattering Mechanism (ESM) test for dual polarimetry (suitable for TanDEM-X)  Parameterization and Setting of threshold  Test on TanDEM-X data

IEEE IGARSS Vancouver, July 27, 2011 Quad vs Dual polarimetry

IEEE IGARSS Vancouver, July 27, 2011 Quad vs dual polarimatry Covariance matrix Example: lexicographic basis. Scattering vector Covariance matrix Reciprocity & monostatic Example: lexicographic basis.

IEEE IGARSS Vancouver, July 27, 2011 ESM test

IEEE IGARSS Vancouver, July 27, 2011 Partial target detector: dual-pol Based on a coherence Independent on the overall amplitude Gain factor Power of target Total Power : target to detect : perturbed target

IEEE IGARSS Vancouver, July 27, 2011 Change detector: Dual polarimetry

IEEE IGARSS Vancouver, July 27, 2011 Threshold settings: dual polarimetry

IEEE IGARSS Vancouver, July 27, 2011 What we want to do: We need to set RedR and T Definition of difference between the SM: Parameterisation in order to relate: Difference Model Detector Eigenvalues

IEEE IGARSS Vancouver, July 27, 2011 Parameterisation(1) vs SM Partial vector Change of basis Polar coordinates in the new basis SCR

IEEE IGARSS Vancouver, July 27, 2011 Parameterisation(2) We want to exploit a model to give a more direct interpretation Eigenvalues model with Final relationship

IEEE IGARSS Vancouver, July 27, 2011 Final Relationship SCRRedR SCRRedR

IEEE IGARSS Vancouver, July 27, 2011 Test on TanDEM-X data (Kryckland, Sweden)

IEEE IGARSS Vancouver, July 27, 2011 Detector Samples: 15x15 ENL: 63 RGB TX ML 0.9 RGB RX Red: HH Blue: VV Green: HH-VV

IEEE IGARSS Vancouver, July 27, 2011 Detector Samples: 15x15 ENL: 63 RGB TX ML 0.98 RGB RX

IEEE IGARSS Vancouver, July 27, 2011 TX Alpha RX Eigenvalues Entropy RX

IEEE IGARSS Vancouver, July 27, 2011 Test on TanDEM-X data (Wallerfing, Germany)

IEEE IGARSS Vancouver, July 27, 2011 Detector Samples: 15x15 ENL: 63 RGB TX ML 0.9 RGB RX

IEEE IGARSS Vancouver, July 27, 2011 Detector Samples: 15x15 ENL: 63 RGB TX ML 0.98 RGB RX

IEEE IGARSS Vancouver, July 27, 2011 Alpha RX Eigenvalues Entropy RX TX

IEEE IGARSS Vancouver, July 27, 2011 Detector Samples: 15x15 ENL: 63 RGB TX ML 0.9 RGB RX

IEEE IGARSS Vancouver, July 27, 2011 Detector Samples: 15x15 ENL: 63 RGB TX ML 0.98 RGB RX

IEEE IGARSS Vancouver, July 27, 2011 Alpha RX Eigenvalues Entropy RX TX

IEEE IGARSS Vancouver, July 27, 2011 Conclusions  A test for ESM was developed for dual polarimetric data  The test is independently of the overall amplitude  A parameterisation was developed in order to set the parameters  The algorithm was tested with TanDEM-X data  Future: To find a link between interferometric coherence and the test

IEEE IGARSS Vancouver, July 27, 2011 Thank you for your attention.

IEEE IGARSS Vancouver, July 27, 2011 Detector Samples: 15x15 ENL: 63 RGB TX ML 0.9 RGB RX

IEEE IGARSS Vancouver, July 27, 2011 Detector Samples: 15x15 ENL: 63 RGB TX ML 0.98 RGB RX