We compared SAR distributions in major anatomical structures of the brain of a homogeneous and a heterogeneous model using FDTD calculations. Our results proved a good correlation between SAR values in lobes of the brain where tumors may arise more frequently. However SAR values at some specific locations were shown to be under or overestimated. key words: brain, epidemiological study, health e...

Abstract — This paper describes the implementation of a 8-bit 50 MS/s SAR ADC using 180nm TSMC CMOS VLSI Process in Mentor Graphics. Here main building blocks of SAR ADC lik e comparator, sample and hold, SAR Register and DAC are implemented. The supply voltage for this SAR ADC is ±1.8 V. The simulation result shows speed of 50 MHz achieved with input frequency of 1 MHz and power dissipation of...

Image Classification is the evolution of separating or grouping an image into different parts. The good act of recognition algorithms based on the quality of classified image. The good feat of recognition algorithms based on the quality of classified image. An important problem in SAR image application is accurate classification. Image segmentation is the mainly practical loom among virtually a...

For merging Synthetic Aperture Radar (SAR) with georeferenced data, one usually uses processing software to orthorectify the SAR images in order to add them in a GIS. Nevertheless, this projection involves an important alteration of the information of SAR images and are often specific to some particular SAR sources. Moreover, the transformation of radarcoding data from a GIS into the radar geom...

INTRODUCTION A multi-antenna transmitter, e.g. in Multi-Input Multi-Output (MIMO) systems, will be implemented in the user equipment (UE) of mobile communication systems in the near future [1]. Applying the standardized procedures [2][3] for obtaining the maximum average Specific Absorption Rate (SAR), which is an evaluation index for RF exposure to human, requires the measurement of the three-...

The work reported in this paper was carried out under an ESA contract (15600/01/I-LG) with the purpose of demonstrating the potential of polarimetric SAR compared with single-polarization data for some key application areas to support the decisions on future satellite SAR systems. Three key application areas were identified (a) SAR polarimetry for agriculture classification, (b) SAR polarimetry...

The relation between the sodium adsorption ratio (SAR) and pHc derived here predicts SAR of the drainage water (SARdw) better than existing empirical equations. Inaccuracies in SAR estimates from the new relationship can be anticipated by the extent to which the derived conditions are valid. Empirical equations provide no understanding of why they are sometimes inaccurate. Due to the relative i...

Long-wavelength SAR backscattering from glacier ice is of high relevance for glaciological applications since it contains information about both surface and subsurface structure of the ice. For this reason, SAR sensors can be used to discriminate and delineate the different glacier facies and to extract information on the ice density, which today can only be estimated on point basis. In this pa...

On synthetic aperture radar (SAR) images acquired over the ocean often sea surface signatures of atmospheric gravity waves (AGWs) as well as of oceanic internal waves are visible. They often look quite similar and it is not always easy to decide whether the wave-like patterns result from AGWs or from oceanic internal waves. In this paper we present criteria how to discriminate between these two...

We develop a method for the formation of spotlight-mode synthetic aperture radar (SAR) images with enhanced features. The approach is based on a regularized reconstruction of the scattering field which combines a tomographic model of the SAR observation process with prior information regarding the nature of the features of interest. Compared to conventional SAR techniques, the method we propose...