Polarimetric features of oyster farm observed by AIRSAR and JERS-1

Seung Kuk Lee, Sang Hoon Hong, Sang Wan Kim, Yoshio Yamaguchi, Joong-sun Won

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The polarimetric features of an oyster farm in a coastal area are analyzed to verify the applicability of radar polarimetry and interferometry. L-band Airborne Synthetic Aperture Radar (AIRSAR) data and Japan Earth Resources Satellite (JERS-1) data are used to examine the unique structure of an oyster farm located in South Korea. A specific feature of the oyster farm is the presence of numerous arrays of structures of various orientations that consist of exercise-bar-shaped poles protruding above sea level. This paper demonstrates that tide level is strongly correlated with the double-bounce scattering power from the vertical pole structures. This phenomenon is also verified by laboratory measurements using a network analyzer. In the laboratory experiment, double-bounce scattering and total power showed increasing trends with increased height of the vertical poles. Single-bounce scattering is sensitive to the orientation of horizontal poles relative to antenna orientation. HH-polarization is the most effective technique for imaging oyster farms from L-band polarimetric AIRSAR data. The authors were able to use a three-component decomposition of the AIRSAR data to distinguish an exposed tidal flat from a submerged tidal flat. The characteristics of the exposed tidal flat are similar to those of the carbon sponge in the laboratory test, except that the double-bounce scattering power is slightly greater in the real-world example. The single-bounce scattering component in AIRSAR data is generally greater than that in laboratory measurements because of sea-surface conditions and oyster growth. When the horizontal pole was aligned normal to the radar look direction, single-bounce scattering was greater than the double-bounce scattering, even under water-covered conditions. While a difference in tide height of 10 cm contributed approximately 3.0 dB in the laboratory experiment, a difference in tide height of 20 cm contributed to only approximately 1.7 dB in the JERS-1 SAR image intensity. JERS-1 SAR image intensity for areas dominated by double- and single-bounce scattering was 0.78 and 0.56, respectively. Results confirm that polarimetric SAR data are useful in selecting areas dominated by double-bounce scattering in oyster farms.

Original languageEnglish
Pages (from-to)2728-2735
Number of pages8
JournalIEEE Transactions on Geoscience and Remote Sensing
Volume44
Issue number10
DOIs
Publication statusPublished - 2006 Dec 1

Fingerprint

Synthetic aperture radar
Farms
synthetic aperture radar
scattering
farm
Scattering
Poles
Tides
tidal flat
tide
Radar
radar
JERS
Polarimeters
Electric network analyzers
Sea level
interferometry
Interferometry
sponge
antenna

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Earth and Planetary Sciences(all)

Cite this

Lee, Seung Kuk ; Hong, Sang Hoon ; Kim, Sang Wan ; Yamaguchi, Yoshio ; Won, Joong-sun. / Polarimetric features of oyster farm observed by AIRSAR and JERS-1. In: IEEE Transactions on Geoscience and Remote Sensing. 2006 ; Vol. 44, No. 10. pp. 2728-2735.
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Polarimetric features of oyster farm observed by AIRSAR and JERS-1. / Lee, Seung Kuk; Hong, Sang Hoon; Kim, Sang Wan; Yamaguchi, Yoshio; Won, Joong-sun.

In: IEEE Transactions on Geoscience and Remote Sensing, Vol. 44, No. 10, 01.12.2006, p. 2728-2735.

Research output: Contribution to journalArticle

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