Land surface observation using multi-polarization ENVISAT ASAR data

Chinatsu Yonezawa, Nobuhiro Tomiyama, Takao Yamakoshi

Research output: Contribution to conferencePaperpeer-review

Abstract

Multi-polarized space borne SAR data can be used to detect changes in land cover. The ENVISAT ASAR has the ability to acquire images using two polarizations simultaneously. This paper discusses the capability of detecting land surface characteristics using ENVISAT ASAR dual polarization data. The applicability of image mode and alternative polarization mode data are investigated, and backscattering coefficients for images with different polarizations are compared. Optical images and GIS data are used as reference data. Two types of land cover in Japan are examined: forest on an active volcano (Miyakejima, a volcanic island that erupted in 2000), and an urban area (central Tokyo). Differences were evident between bare land and forest areas in the HH and HV polarized data sets. City street patterns exhibit differences in backscattering characteristics between like- and cross- polarized SAR images: cross-polarization backscattering is increased for streets that are inclined to the radar irradiation direction.

Original languageEnglish
Pages4564-4567
Number of pages4
Publication statusPublished - 2004
Externally publishedYes
Event2004 IEEE International Geoscience and Remote Sensing Symposium Proceedings: Science for Society: Exploring and Managing a Changing Planet. IGARSS 2004 - Anchorage, AK, United States
Duration: 2004 Sep 202004 Sep 24

Other

Other2004 IEEE International Geoscience and Remote Sensing Symposium Proceedings: Science for Society: Exploring and Managing a Changing Planet. IGARSS 2004
CountryUnited States
CityAnchorage, AK
Period04/9/2004/9/24

Keywords

  • Alternating polarization
  • Disaster monitoring
  • Land cover
  • Urban
  • Volcano

ASJC Scopus subject areas

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

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