The present research is an introductory paper on Synthetic Aperture Radar (SAR) systems. A review on topics and techniques related to the longrange and shortrange SAR systems are presented. The longrange SAR image is constructed using RangeDoppler Algorithm (RDA); while the RangeMigration Algorithm (RMA) is implemented with shortrange SAR for image formation. The simulation results indica...

Researchers at the Alaska SAR Facility (ASF) have developed a hybrid package of YMP and T3D based SAR processing algorithms using the Arctic Region Supercomputing Center (ARSC). The capabilities include; radiometric calibration, low-pass filtering, creation of simulated SAR images, image-to-image correlation, terrain correction, incidence angle normalization, and large scale mosaicking. Using t...

It is possible to interpret the shape of buildings based on synthetic aperture radar (SAR) images acquired using airborne SAR systems. However, the pixel values of SAR images have high dynamic range intensity, and SAR images are not displayable without dynamic range intensity compression. We therefore have developed a dynamic range intensity compression method suitable for SAR image features. U...

The synthesis of protein A in Staphylococcus aureus is regulated by global regulatory loci such as sar and agr. Phenotypic data indicate that both sar and agr suppress protein A synthesis; like agr, sar also regulates protein A production at the transcriptional level. To determine the genetic requirement of sar in protein A suppression, we transformed shuttle plasmids containing various sar fra...

We investigated the fitness benefits of systemic acquired resistance (SAR) in Arabidopsis thaliana using a mutational and transformational genetic approach. Genetic lines were designed to differ in the genes determining resistance signaling in a common genetic background. Two mutant lines (cpr1 and cpr5) constitutively activate SAR at different points in SAR signaling, and one mutant line (npr1...

Radar Polarimetry Radar Interferometry and Polarimetric SAR Interferometry represent the current culmination in ‘Microwave Remote Sensing’ technology, but we still need to progress very considerably in order to reach the limits of physical realizability. Whereas with radar polarimetry the textural fine-structure, target orientation, symmetries and material constituents can be recovered with con...

The high squint diving SAR is widely used to provide the information in advance. Large squint angle deduces the deeper coupling of range and azimuth of SAR echoes which makes SAR imaging more difficult. Especially, the large range migration of the deep couple heavily burdens the imaging processing time and storage units. The diving motion of platform worsens the situation. This paper proposes t...

Many applications require the ability to use airborne sensor data to perform accurate geopositioning. Synthetic Aperture Radar’s (SAR) ability to image from long distances and in poor weather makes it advantageous for such geopositioning. However, the ability to accurately position using SAR data is reliant on having accurate sensor support data (sensor position, velocity, etc...). This paper e...

The CORSAR project (Carbon Observation and Retrieval from SAR), which is supported by the UK Natural Environment Research Council (NERC), has the objective to examine polarimetric decomposition and polarimetric SAR interferometry methods for estimating the effects of canopy structure in biomass-backscatter relationships. Forest canopy height is a useful input parameter to yield models, carbon c...