SAN FRANCISCO BAY. L-band 1988 AIRSAR. DC8 P, L, C-Band (Quad) Microwaves and Radar Institute, Wolfgang Keydel

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1 SAN FRANCISCO BAY L-band 1988 AIRSAR DC8 P, L, C-Band (Quad)

2 TARGET GENERATORS HH+VV T11=2A0 HV T33=B0-B HH-VV T22=B0+B

3 TARGET GENERATORS Sinclair Color Coding HH HV VV Pauli Color Coding HH+VV T11=2A0 HV T33=B0-B HH-VV T22=B0+B

4 H / A / DECOMPOSITION ENTROPY (H) 0.5 ANISOTROPY (A) 1.0

5 TARGET GENERATORS 2 A0 db B0 B db B0 B db -15dB -30dB 0dB

6 IGARSS 2006 Denver, Cororado, 2006 Polarimetric Analysis of Radar Signature of a Manmade Structure J.S. Lee, T. Ainsworth NRL, Washington DC 20375, USA Ernst Krogager Danish Defence Research Establishment, Copenhagen, Denmark Wolfgang-Martin Boerner University of Illinois at Chicago, IL, USA

7 Polarimetric SAR Image RANGE FLIGHT Pauli Vector, HH-VV, HV, HH+VV EMISAR C-Band Polarimetric SAR Image of StoreBelt Bridge

8 Store Bridge Signature during Construction Flight Direction HH (A) HH image (B) HV image (C) VV image HV VV 3

9 Surface and Double Bounce Scatterings Surface (Bragg) scattering HH and VV are in phase Dihedral scattering HH and VV is 180 out of phase Realiter, phase difference of Bragg scattering, albeit small, is a function of incidence angle & dielectric constant. Two perpendicular conducting plates 1

10 Multi- Bounce Scattering Triple Double Singl e L d Roundtrip distances: Single bounce return: 2( L d cos ) Double bounce return: 2L Triple bounce return: 2( L d cos ) is the local incidence angle. 2

11 Polarimetric Target Decomposition High-resolution POLSAR signature of a suspension bridge under construction - the deck was not installed. RANGE FLIGHT Pauli Decomposition, HH-VV, HV, HH+VV Aerial Photo Krogager SDH Decomposition Blue= Sphere Green = Helix Red = Diplane. EMISAR C-Band Polarimetric SAR Image of StoreBelt Bridge 4

12 Cloude and Pottier Decomposition Bridge under construction - deck not installed. H Entropy Double bounce from cables Direct bounce from cables Triple bounce from cables Aerial Photo Alpha Angle (Rotational invariant) Dominant scattering mechanisms are extracted by applying target decomposition: Blue= Surface Green = Dipole Red = Double Bounce. EMISAR C-Band Polarimetric SAR Image of StoreBelt Bridge

13 BRIDGE RADAR SIGNATURES After Completion of Bridge Construction HH+VV HH-VV HV (EMISAR C- Band)

14 Polarimetric Target Decomposition After Completion RANGE FLIGHT HV HH-VV HH+VV SDH

15 Cloude and Pottier Decomposition After Completion Entropy Angle 6 Dominant scattering mechanisms are extracted by applying target decomposition: Microwaves and Radar Institute,=Wolfgang Keydel Red = Double Bounce. Blue= Surface Green Dipole

16 Higher Order Multiple Bounces After Completion Alpha 6c Roundtrip distances: A: Triple bounces, 2( L d cos ) B: 5 (or 7) bounces, 2( L d cos ) 2d C: 7 (or 9) bounces, 2( L d cos ) 4d D: 9 (or 11) bounces, 2( L d cos ) 6d ( ) indicates additional two bounces from the bottom of the deck. 7 Dominant scattering mechanisms are extracted by applying target decomposition: Blue= Surface Green = Dipole Red = Double Bounce.

17 BRIDGE AND BUOY RADAR SIGNATURES (EMISAR C- Band) Polarimetric SAR Image ( HH-VV, HV, HH+VV ) Navigation Map of Storebelt, Denmark