Title :
Polarimetric analysis over African savanna woodland using ALOS/PALSAR
Author :
Paradzayi, Charles ; Annegarn, Harold ; Erasmus, Barend ; Schmullius, Christiane
Author_Institution :
Dept. of Geogr., Environ. Manage. & Energy Studies, Univ. of Johannesburg, Johannesburg, South Africa
Abstract :
This paper presents polarimetric analysis over African Savanna woodland using ALOS/PALSAR to investigate the trend between backscatter and biomass levels. An extensive field inventory was carried out combining Differential GPS and conventional topographic mapping techniques. Geographic position, basal diameter and height of trees in sampled plots were measured. Plot level biomass quantities were obtained using established allometry for the region. Geocoded ALOS/PALSAR level 1.1 and 1.5 data is checked for accuracy against existing geospatial data for the case study area. Sigma nought, Freeman and Pauli component are extracted for the sampled plots to investigate the relationship between biomass, volume and double bounce scattering. Finally a comparison of sigma nought, Freeman and Pauli components is carried out to analyze trend against volume and double bounce scattering.
Keywords :
Global Positioning System; backscatter; radar polarimetry; synthetic aperture radar; topography (Earth); vegetation mapping; ALOS observation; African savanna woodland; Freeman component; PALSAR observation; Pauli component; Phased Array type L-band Synthetic Aperture Radar; backscatter; basal diameter; biomass levels; differential GPS techniques; double bounce scattering; geographic position; polarimetric SAR; polarimetric analysis; sigma nought component; topographic mapping techniques; tree height; volume scattering; Africa; Animals; Backscatter; Biomass; Earth; Environmental management; Geography; Global Positioning System; Radar scattering; Spaceborne radar; ALOS/PALSAR; biomass; double bounce scattering; polarimetric SAR; sigma nought; volume scattering;
Conference_Titel :
Geoscience and Remote Sensing Symposium,2009 IEEE International,IGARSS 2009
Conference_Location :
Cape Town
Print_ISBN :
978-1-4244-3394-0
Electronic_ISBN :
978-1-4244-3395-7
DOI :
10.1109/IGARSS.2009.5417957
