Octavio Ponce, Pau Prats , Marc Rodriguez-Cassola, Rolf Scheiber, Andreas Reigber Microwave and Radar Institute (HR) German Aerospace Center Processing of Circular SAR Trajectories with Fast Factorized Back-Projection
Circular SAR (CSAR)
Fast Factorized Back Projection (FFBP)
FFBP for Circular SAR
Acquisition Geometry .
Resolution – Stripmap 2D IRF 2D Sinc Time Domain Frequency Domain y x
Resolution – CSAR 2D IRF Time Domain Frequency Domain Soumekh et al, IEEE TIP, 1996 y x
Polarimetric Results - Subapertures Pauli 1240 x 1240 m; Δφ =10°
CSAR vs Strimap SAR 1500 x 1500 m E-SAR L-band, 94MHz bandwidth
CSAR vs Strimap SAR E-SAR L-band, 94MHz bandwidth
E-SAR L-band, 94MHz bandwidth CSAR vs Strimap SAR
E-SAR L-band, 94MHz bandwidth CSAR vs Strimap SAR 180 x 180 m
E-SAR L-band, 94MHz bandwidth Circular SAR vs Strimap SAR 180 x 180 m
DEM + 0m Tomography CSAR DEM + 2m DEM + 3m DEM + 4m E-SAR L-band, 94MHz bandwidth
Luneberg Lens 1500 x 1500 m
Tree E-SAR L-band, 94MHz bandwidth Tomography CSAR -5m < H < 15m 300 x 300 m
FFBP adapted to CSAR successfully:
High improvement in the Speed-up Factor
Implementation in a graphic processor unit (GPU)
Experimental results with DLR’s E-SAR data have been used to validate the algorithm
Currently processing new “multi-circular” F-SAR campaign
Thanks for your attention!
Octavio Ponce: [email_address]
Pau Prats: [email_address]
DLR (German Aerospace Center)
HR (Microwaves and Radar Institute)
H. Oriot, H. Cantalloube, “Circular SAR imagery for urban remote sensing” , EUSAR 2008.
A. Ishimaru, Chan, Kuga, “An Imaging Technique Using Confocal Circular Synthetic Aperture Radar”, IEEE Transactions on Geoscience and Remote Sensing, Vol. 36, No.5, Septemper 1998.
M. Soumekh, “Synthetic Aperture Radar Signal Processing with Matlab Algorithms”, John Wiley & Sons, Inc.
M. Pinheiro, P. Prats, R. Scheiber, M. Nannini, and A. Reigber, “Tomographic 3D reconstruction from airborne circular SAR,” in Geoscience and Remote Sensing Symposium, 2009 IEEE International, IGARSS 2009, 2009, vol. 3, pp. III–21 – III–24.
Lars M. H. Ulander and et. al., “Synthetic-Aperture Radar Processing Using Fast Factorized Back-Projection,” IEEE Transactions on Aerospace and Electronic Systems, vol. 39, no. 3, pp. 760–776, July 2003.
M. Rodriguez-Cassola, P. Prats, G. Krieger, and A. Moreira, “Efficient Time-Domain Focussing for General Bistatic SAR Configurations: Bistatic Fast Factorised Backprojection,” in European Conference on Synthetic Aperture Radar (EUSAR), Jun 2010.