Synthetic Aperture Radar (L band) and Optical Vegetation Indices for Discriminating the Brazilian Savanna Physiognomies: A Comparative Analysis | Zendy

Edson Eyji Sano | Zendy; Laerte Guimarães Ferreira | Zendy; Alfredo Huete | Zendy

Open Access

Synthetic Aperture Radar (L band) and Optical Vegetation Indices for Discriminating the Brazilian Savanna Physiognomies: A Comparative Analysis

Author(s) -

Edson Eyji Sano,

Laerte Guimarães Ferreira,

Alfredo Huete

Publication year - 2005

Publication title -

earth interactions

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.309

H-Index - 38

ISSN - 1087-3562

DOI - 10.1175/ei117.1

Subject(s) - vegetation (pathology) , remote sensing , environmental science , synthetic aperture radar , normalized difference vegetation index , backscatter (email) , radar , hydrometeorology , enhanced vegetation index , biosphere , meteorology , geography , climate change , geology , vegetation index , precipitation , ecology , computer science , medicine , telecommunications , oceanography , pathology , biology , wireless

The all-weather capability, signal independence to the solar illumination angle, and response to 3D vegetation structures are the highlights of active radar systems for natural vegetation mapping and monitoring. However, they may present significant soil background effects. This study addresses a comparative analysis of the performance of L-band synthetic aperture radar (SAR) data and optical vegetation indices (VIs) for discriminating the Brazilian cerrado physiognomies. The study area was the Brasilia National Park, Brazil, one of the test sites of the Large-Scale Biosphere–Atmosphere (LBA) experiment in Amazonia. Seasonal Japanese Earth Resources Satellite-1 (JERS-1) SAR backscatter coefficients (σ°) were compared with two vegetation indices [normalized difference vegetation index (NDVI) and enhanced vegetation index (EVI)] over the five most dominant cerrados’ physiognomies plus gallery forest. In contrast to the VIs, σ° from dry and wet seasons did not change significantly, indicating primar...

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