The impact of the structure and composition of shrub-coppice dune landscapes on MASTER reflectance anisotropy

M. Chopping, A. Schmugge, J. Ritchie, W. Kustas

Research output: Contribution to journalArticlepeer-review

Abstract

This study assesses the effects of physical structure and composition of shrub-coppice dune landscapes on anisotropy in the NASA MODIS-ASTER Airborne Simulator (MASTER) solar channels, and investigates the viability of simulating multi-angular data sets using off-nadir airborne imaging radiometry from a single overpass by means of data segmentation. Segmentation data are plant density and cover and spectral measures derived from high-resolution aerial photography and classified Landsat 7 Enhanced Thematic Mapper imagery. The directional signal contributes a variation of 5-10% in reflectance, necessitating angular corrections. For most areas the signal appears to differ only slightly with changes in landscape structure and composition because the view/illumination geometry is poor and reflectance is dominated by bright soils. Further work is required to determine whether simple models would be adequate for angular corrections.

Original languageEnglish
Pages (from-to)162-167
Number of pages6
JournalIAHS-AISH Publication
Issue number267
StatePublished - 1 Dec 2001

Keywords

  • Anisotropy
  • Dunes
  • Landscape
  • Mesquite
  • Multiple view angle
  • New Mexico
  • Structure

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