PolSAR imaging of wetlands: New insights into backscatter physics

F. J. Ahern, B. Brisco, K. Murnaghan, L. White, Shimon Wdowinski, S. H. Hong, D. Atwood

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

It is commonly-accepted that the enhanced backscatter from wetlands that consist of many emergent stems over open water (swamps and marshes) is dominated by double-bounce backscatter. Recent observations with fully polarimetric data from Radarsat-2 over the extensive wetlands of the Everglades and numerous small wetlands in Ontario are not consistent with this interpretation of the backscatter physics. In this paper we use several forms of polarimetric analysis and decomposition. All of these indicate that the backscatter from small marshes and swamps in Ontario has polarimetric characteristics normally attributed to the odd-bounce mechanism. A recently-proposed form of Bragg scattering provides a conceptual model to explain these observations. However, detailed electromagnetic backscatter modelling is still needed to provide a new and reliable understanding of backscattering from wetlands with emergent vegetation.

Original languageEnglish (US)
Title of host publicationInternational Geoscience and Remote Sensing Symposium (IGARSS)
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1171-1174
Number of pages4
ISBN (Print)9781479957750
DOIs
StatePublished - Nov 4 2014
EventJoint 2014 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2014 and the 35th Canadian Symposium on Remote Sensing, CSRS 2014 - Quebec City, Canada
Duration: Jul 13 2014Jul 18 2014

Other

OtherJoint 2014 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2014 and the 35th Canadian Symposium on Remote Sensing, CSRS 2014
CountryCanada
CityQuebec City
Period7/13/147/18/14

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Keywords

  • polarimetry
  • Radar
  • SAR
  • wetlands

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Computer Science Applications

Cite this

Ahern, F. J., Brisco, B., Murnaghan, K., White, L., Wdowinski, S., Hong, S. H., & Atwood, D. (2014). PolSAR imaging of wetlands: New insights into backscatter physics. In International Geoscience and Remote Sensing Symposium (IGARSS) (pp. 1171-1174). [6946639] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IGARSS.2014.6946639