Evaluating VHF-Band SAR Autofocus Algorithms using a Forest Backscatter Model
Paper i proceeding, 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

Författare

Annelie Wyholt

Chalmers, Institutionen för radio- och rymdvetenskap, Radarfjärranalys

Lars Ulander

Chalmers, Institutionen för radio- och rymdvetenskap, Radarfjärranalys

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

Ämneskategorier

Signalbehandling

Annan elektroteknik och elektronik

DOI

10.1109/IGARSS.2009.5417608

ISBN

978-1-4244-3395-7

Mer information

Skapat

2017-10-07