MODIFIED AUTO-FOCUSING ALGORITHM FOR HIGH SQUINT DIVING SAR IMAGING BASED ON THE BACK-PROJECTION ALGORITHM WITH SPECTRUM ALIGNMENT AND TRUNCATION

Modified Auto-Focusing Algorithm for High Squint Diving SAR Imaging Based on the Back-Projection Algorithm with Spectrum Alignment and Truncation

The study focuses on addressing the image defocusing issue caused by motion errors in highly squinted Synthetic Aperture Glasses Radar (SAR).The traditional auto-focusing algorithm, Phase Gradient Autofocus (PGA), is not effective in this mode due to difficulties in estimating the phase gradient accurately from strong point targets.Two main reasons

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Avaliação da concentração de mercúrio em sedimentos e material particulado no rio Acre, estado do Acre, Brasil Mercury concentration assessment in botton sediments and suspended solids from Acre river, in the State of Acre, Brazil

A avaliação dos teores de mercúrio em sistemas aquáticos sem influência direta de fontes antropogênicas conhecidas não tem sido conduzida com freqüência na região Amazônica.Visando contribuir para esclarecer a ocorrência de valores elevados de Hg em peixes consumidos pela população de Rio Branco - AC, o Instituto Evandro Chagas - IEC,

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