Dr. Iulia Dana Negula Profile

Dr. Iulia Dana Negula

at Agentia Spatiala Romana

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Proceedings Article | 12 August 2016 Paper

Land degradation monitoring in Braila agricultural area using RADARSAT2 data

Violeta Poenaru, Alexandru Badea, Iulia Dana Negula, Cristian Moise, Sorin Cimpeanu

Proceedings Volume 9688, 968815 (2016) https://doi.org/10.1117/12.2240394

KEYWORDS: Agriculture, Picosecond phenomena, Synthetic aperture radar, Interferometry, Polarimetry, Vegetation, Scattering, Polarization, Data acquisition, Image processing

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The estimation of degradation in agricultural lands from fully polarimetric synthetic aperture radar (SAR) data at C-band using differential SAR interferometry is investigated. To this aim, we used a dataset of high resolution SAR images collected in the joint ESA-CSA SOAR Europe-16605 scientific proposal framework that have been processed through the persistent scattering – DInSAR technique. Moreover, to improve PSInSAR analysis, we used polarimetric optimization method on multi-temporal polarimetric SAR data. Optimization is based on the selection of the most stable scattering mechanism over time since the unitary complex column vector is related to the geometric and electromagnetic features of the target. We applied this method on a dataset including 14 compact polarization SAR data (HH/HV/VV) acquired by RADARSAT2 from August 2014 to November 2015 over Braila agricultural area. The area has been affected by land degradation due to salinization and irrigation water overexploitation. The results reveal that the use of an optimum scattering mechanism provides a significant improvement in increasing the PS density and hence the density of the pixels with valid deformation results with respect to single-pol data (about 50% more than single channel datasets).

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