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  • Articles  (37)
  • 2010-2014  (37)
  • 2011  (37)
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  • Articles  (37)
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  • 2010-2014  (37)
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  • 1
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    IEEE Geoscience and Remote Sensing Letters publication information (2011)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publication Date: 2011-12-23
    Description: Provides a listing of current society officers.
    Print ISSN: 1545-598X
    Electronic ISSN: 1558-0571
    Topics: Architecture, Civil Engineering, Surveying , Geography , Geosciences
    Published by Institute of Electrical and Electronics Engineers (IEEE)
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  • 2
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    Explore IEL IEEE's most comprehensive resource (2011)
    Institute of Electrical and Electronics Engineers (IEEE)
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    Publication Date: 2011-12-23
    Print ISSN: 1545-598X
    Electronic ISSN: 1558-0571
    Topics: Architecture, Civil Engineering, Surveying , Geography , Geosciences
    Published by Institute of Electrical and Electronics Engineers (IEEE)
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  • 3
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    IEEE Geoscience and Remote Sensing Letters information for authors (2011)
    Institute of Electrical and Electronics Engineers (IEEE)
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    Publication Date: 2011-12-23
    Description: Provides instructions and guidelines to prospective authors who wish to submit manuscripts.
    Print ISSN: 1545-598X
    Electronic ISSN: 1558-0571
    Topics: Architecture, Civil Engineering, Surveying , Geography , Geosciences
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  • 4
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    IEEE Geoscience and Remote Sensing Letters institutional listings (2011)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publication Date: 2011-12-23
    Print ISSN: 1545-598X
    Electronic ISSN: 1558-0571
    Topics: Architecture, Civil Engineering, Surveying , Geography , Geosciences
    Published by Institute of Electrical and Electronics Engineers (IEEE)
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  • 5
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    Support-Vector-Based Hyperspectral Anomaly Detection Using Optimized Kernel Parameters (2011)
    Institute of Electrical and Electronics Engineers (IEEE)
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    Publication Date: 2011-11-01
    Description: In this letter, a method to optimally determine the kernel bandwidth of the Gaussian radial basis function (RBF) kernel for support vector (SV)-based hyperspectral anomaly detection is presented. In this method, the support of a local background distribution is first nonparametrically learned by a technique called SV data description (SVDD). The SVDD optimally models an enclosing hypersphere around the local background data in a high-dimensional feature space associated with the Gaussian RBF kernel. Any test pixel that lies outside this hypersphere surrounding the local background is considered an anomaly and, hence, a possible target pixel. Considerable improvement in detection performance due to kernel parameter optimization can be seen in the simulation results when the algorithm is applied to hyperspectral images.
    Print ISSN: 1545-598X
    Electronic ISSN: 1558-0571
    Topics: Architecture, Civil Engineering, Surveying , Geography , Geosciences
    Published by Institute of Electrical and Electronics Engineers (IEEE)
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  • 6
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    InSAR Tropospheric Stratification Delays: Correction Using a Small Baseline Approach (2011)
    Institute of Electrical and Electronics Engineers (IEEE)
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    Publication Date: 2011-11-01
    Description: Interferometric synthetic aperture radar (SAR) (InSAR) phase is affected by atmospheric path delay. It is common to separate the path delay into one component related to turbulent mixing processes and one component related to tropospheric stratification. Tropospheric stratification introduces phase delays correlating with topography, limiting interpretation of InSAR data in areas with steep topography. Improved access to SAR time series has led to the development of several innovative multitemporal InSAR algorithms. Small baseline (SB) is one such time-series method, based on combining and inverting a set of unwrapped interferograms to estimate surface displacement. In this letter, we present a method for estimating and correcting the effects of tropospheric stratification observed in an SB stack of interferograms. We demonstrate the value of this approach using InSAR data from the Envisat spacecraft and compare the InSAR estimated delays with results from a Global Positioning System network.
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    Topics: Architecture, Civil Engineering, Surveying , Geography , Geosciences
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  • 7
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    Mesoscale Terrestrial Laser Scanning of Fluvial Gravel Surfaces (2011)
    Institute of Electrical and Electronics Engineers (IEEE)
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    Publication Date: 2011-11-01
    Description: Terrestrial laser scanning (TLS) point cloud data were gathered in the field of exposed gravel surfaces for sampling sites with a spatial extent of 6m × 6m. We propose in this letter a novel two-stage mean-based filter scheme for processing the point cloud to generate the digital surface model (DSM) at a resolution of 1 cm. To the authors' knowledge, this letter reports the first work of generating a DSM of a gravel surface of such a large spatial extent with high spatial resolution using TLS. The elevation variations attributed to gravel clasts and single grains can both be captured in the point cloud data. To eliminate data voids due to the obstruction of the line of sight, a multiple-scan strategy is employed, which includes four scans at the corners of the sampling site and two supplementary scans for the central 2m × 2m area. The resultant DSM exhibits good agreement with elevation profiles obtained using a traditional manual profiler. The proposed method is an effective tool for obtaining a quality DSM of fluvial gravel surfaces using TLS with fewer scans than previous study.
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    Topics: Architecture, Civil Engineering, Surveying , Geography , Geosciences
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  • 8
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    Correlation Coefficients Between Polarization Signatures for Evaluating Polarimetric Information Preservation (2011)
    Institute of Electrical and Electronics Engineers (IEEE)
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    Publication Date: 2011-11-01
    Description: In order to evaluate quantitatively the preservation performance of polarimetric information for polarimetric synthetic aperture radar (PolSAR) speckle filters, this letter presents correlation coefficients between the original and the filtered polarimetric data based on the theory of polarization synthesis. The copolarized and the cross-polarized correlation coefficients are furthermore discussed in cases whether the transmitting and receiving radar antennas are characterized by the same or orthogonal polarization state. To show how these coefficients can be exploited in evaluating the preservation of polarimetric information, they are demonstrated with a German Aerospace Center (DLR) Experimental Synthetic Aperture Radar L-band full-polarized image of the Oberpfaffenhofen Test Site Area (DE), Germany, which was obtained on September 30, 2000. Results make evident that the correlation coefficients are efficient to describe quantitatively the performance in preserving polarimetric information for PolSAR speckle filters.
    Print ISSN: 1545-598X
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    Topics: Architecture, Civil Engineering, Surveying , Geography , Geosciences
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  • 9
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    Inverse Profiling via an Effective Linearized Scattering Model and MRF Regularization (2011)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publication Date: 2011-11-01
    Description: The aim of this letter is to show how a joint adoption of a suitable regularization scheme and a proper rewriting of the traditional electromagnetic scattering equation allows introducing an interesting linear inversion tool which allows achieving nice reconstructions in many cases of practical interest. In particular, an innovative inversion approach which takes definite advantage from the joint use of the Contrast Source-Extended Born model and a Markov-random-field-based regularization scheme is proposed. Numerical examples, confirming accuracy usefulness, are reported and discussed.
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    Topics: Architecture, Civil Engineering, Surveying , Geography , Geosciences
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  • 10
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    Interferometric Circular SAR Method for Three-Dimensional Imaging (2011)
    Institute of Electrical and Electronics Engineers (IEEE)
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    Publication Date: 2011-11-01
    Description: The aperture of 360° gives circular synthetic aperture radar (SAR) (CSAR) the capability to detect hidden target when its orientation is unknown. Subwavelength resolution can also be achieved when the target in the spotted area is observed under a complete circular aperture. Furthermore, the aspect angle diversity inherent to the circular trajectory makes possible a 3-D target reconstruction. However, the latter two potentials require certain target reflectivity homogeneity. For a highly directive scatterer, it has no resolving ability in the direction normal to the data collection plane. In this letter, a new interferometric CSAR method is presented to enhance the tomographic imaging capability for highly directive scatterers without sacrificing other scatterers' resolutions. This method takes advantage of the coherence and the phase difference between a pair of 3-D SAR images formed from data collected at two separate circular apertures to eliminate targets that focused at a wrong elevation. In addition, it uses two different transmit frequencies to solve the problem of phase cycle ambiguities. Finally, simulation results validate this new approach.
    Print ISSN: 1545-598X
    Electronic ISSN: 1558-0571
    Topics: Architecture, Civil Engineering, Surveying , Geography , Geosciences
    Published by Institute of Electrical and Electronics Engineers (IEEE)
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