Evaluating VHF-Band SAR Autofocus Algorithms using a Forest Backscatter Model
Paper in proceedings, 2009

The objective of this paper is to assess the accuracy of an autofocus method developed for the Fast Factorized Back-Projection (FFBP) algorithm in simulated scenarios. We specifically address the question whether correlation measurements between subimages will suffice in the focusing process in one arbitrary merging step. A forest clutter model is used together with a model of the impulse responses to simulate two SAR sub-images of a forest. Correlation is used for sub-image matching and residual displacement errors are compiled using simulation. We conclude that the matching error increases with increased number of trees per resolution cell but can be restored with a larger image size in the correlation measurements. We also conclude that the autofocus method will be successful.

SAR

Autofocus

Back-Projection

VHF-Band

Author

Annelie Wyholt

Chalmers, Department of Radio and Space Science, Radar Remote Sensing

Lars Ulander

Chalmers, Department of Radio and Space Science, Radar Remote Sensing

2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009; Cape Town; South Africa; 12 July 2009 through 17 July 2009

Vol. 4 9-12

Subject Categories

Signal Processing

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/IGARSS.2009.5417608

ISBN

978-1-4244-3395-7

More information

Created

10/7/2017