نتایج جستجو برای: synthetic aperture radar sar
تعداد نتایج: 203812 فیلتر نتایج به سال:
This paper presents results from an Adaptable Data Fusion Testbed (ADFT) which has been constructed to analyze simulated or real data with the help of modular algorithms for each of the main fusion functions and image interpretation algorithms. The results obtained from data fusion of information coming from an imaging Synthetic Aperture Radar (SAR) and non-imaging sensors (ESM, IFF, 2-D radar)...
An experimental Unmanned Aerial Vehicle (UAV) Synthetic Aperture Radar (SAR) Sensor has been designed and developed at Multimedia University, Malaysia. This airborne system is an inexpensive C-band, single polarisation, linear FM airborne radar sensor. The system will be used for monitoring and management of earth resources such as paddy fields, oil palm plantation and soil surface. A series of...
Urban structure detection, in terms of both geometric and electromagnetic features, from a single Synthetic Aperture Radar (SAR) image is, nowadays, an interesting still open challenge. Within this framework a new deterministic approach for the extraction of the height of an isolated building on a rough terrain is presented. The approach is based on a sound electromagnetic model which fully rep...
Interferometric methods are well established in optics and radio astronomy. In recent years, interferometric concepts have been applied successfully to synthetic aperture radar (SAR) and have opened up new possibilities in the area of earth remote sensing. However interferometric SAR applications require thorough phase control through the imaging process. The phase accuracy of SAR images is aff...
Synthetic Aperture Radar (SAR) is an indispensable source of information in earth observation since SAR is the only spaceborne sensor that has highresolution, all-weather and day-and-night imaging capability. Within the next 10 years more than 20 spaceborne SAR systems from different nations will be launched. Increased demand for larger swath width and higher geometric resolution poses contract...
Polarimetry is the measurement and interpretation of different polarizations of electro-magnetic waves. Synthetic Aperture Radar (SAR) has been proven to be a powerful earth observation tool and emerging Polarimetric SAR (POLSAR) adds another dimension to SAR information content. Polarimetric SAR has been used in retrieval of soil moisture and surface roughness, snow and ice mapping and land-co...
A directional filter algorithm for intensity synthetic aperture radar (SAR) image based on nonsubsampled contourlet transform (NSCT) and immune clonal selection (ICS) is presented. The proposed filter mainly focuses on exploiting different features of edges and noises by NSCT. Furthermore, ICS strategy is introduced to optimize threshold parameter and amplify parameter adaptively. Numerical exp...
This paper presents statistical modelling of sea clutter in airborne S-band fully polarimetric synthetic aperture radar (SAR) data. The modelling was performed by using squared radius and trace statistic for singlelook and multilook fully polarimetric SAR data, respectively. Both homogeneous and texture models were investigated and evaluated quantitatively. From the obtained results, it was fou...
Characterizing and Correcting Residual RFI Signatures in Operationally Processed ALOS-PALSAR Imagery
Radio-frequency interference (RFI) has long been identified as a problem in L-band Synthetic Aperture Radar (SAR), as it is limiting the application, performance, and data quality of SAR at many areas around the globe. Several algorithms for RFI mitigation have been developed throughout the recent decades (Le, et al., 1998; Reigber and Ferro-Famil, 2005; Rosen, et al., 2008) in response to this...
The product quality with respect to radiometric accuracy of current and future space-borne synthetic aperture radar (SAR) systems depends on the grade of the utilized external calibration targets. This paper presents the first steps taken in designing and building a highly accurate active target (transponder), which exhibits high radar cross section stability (in the order of a tenth of a decib...
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