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This paper presents an effective registration method between two geophysical images from different modalities, namely magnetic and electrical, in order to increase the information obtained from the two original images independently. In order to achieve the registration, random local transformations were applied in 5 × 5 randomly chosen windows of the sensed image while the mutual information was used...
A high-contrast inpainting scheme, based on the Complex Ginzburg-Landau equation, is successfully applied to restoration of SAR interferograms. The algorithm demonstrates quite effective in recovering the phase values in low coherence regions. The validation setup has been carried out in the presence of additive phase noise with a suitable probability density function. Results show that the application...
One of the goals of LIDAR scientists is to obtain long term monitoring of water vapor using Raman LIDAR [1]. Previous LIDAR research suggests that the measurement of water vapor can be improved by better analysis of the LIDAR system's calibration factor. Currently LIDAR scientists generally use radiosonde data to calibrate LIDAR data. We are using a standard lamp calibration technique to calibrate...
The accuracy of the digital elevation model (DEM) generated by the interferometric synthetic aperture radar (SAR) partly depends on the accuracy of system parameters, so it is necessary to calibrate the system parameters. The traditional calibration method models the elevation error as a linear function of parameter biases, and solves the biases through the sensitivity equations. This paper presents...
Ground surface deformation can be monitored from time series of SAR interferograms. Conventional approaches to that problem usually require unwrapping of the interferograms that can be limiting due to decorrelation. We present a method producing denoised wrapped phase time series from a set of differential interferograms. The different paths linking two dates are combined to derive the most likely...
In this paper we propose some ionospheric correction schemes for space-borne synthetic aperture radar (SAR) and polarimetric interferometric SAR (PolInSAR). The spatial and temporal variation of the free electron density in the upper-most atmosphere affects the propagation of the radar pulse resulting in image distortions. We estimate the total electron content (TEC) by applying the Appleton-Hartree...
The Human Visual System (HVS) has been observed to process visual information on a multi-channel filtering basis in the early stages of analysis. This has given rise to a number of texture segmentation techniques that seek to mimic the HVS multi-channel filtering theory.
SMOS is the acronym for the Soil Moisture and Ocean Salinity mission by the European Space Agency (ESA) [1]. Its single payload, the Microwave Imaging Radiometer using Aperture Synthesis (MIRAS), was successfully launched in November 2009. A six months Commissioning Phase was devoted to bring the satellite into a fully operational condition and to characterize the payload using specific orbits to...
This paper proposes a new polarimetric Synthetic Aperture Radar (PolSAR) calibration method that applies an incoherent decomposition model to the uncalibrated covariance data measured for the forest and surface, and determines the polarimetric distortion matrix (PDM). The Freeman-Durden model [1] is used to express the polarization dependent signal reflection from and penetration through the forest...
It is a huge challenge to utilise them for interferometry due to the impacts of non-linear azimuth phases and insufficient parameters, although the TerraSAR-X ScanSAR system is able to provide SLC data with both large coverage and high resolution. A Blind Estimation Method for Azimuth Phase Elimination (BEMAPE) is proposed here aiming to resolve these problems through eliminating the azimuth phases...
The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) has acquired more than 1 million data with along-track stereovision. These data are processed to make digital elevation model (DEM) with orthorectified images. Using multiple DEMs obtained at different times, it is expected to enhance the spatial resolution. In this work, the methodology to enhance the resolution of DEM, especially...
In this contribution, the relation between the principal components of the covariance matrix of a hyperspectral image and the spectra of the endmembers is studied. When the data satisfy the spectral mixing model, from this relation the spectra of the endmembers and the abundance of each endmember in the pixels of the image can be theoretically obtained through a non-lineal minimization process. The...
A novel method of registering the satellite images is introduced in this paper. The existing vector road maps are used as control information instead of the ground control points. The whole process is divided into 4 issues: find the initial relationship between the road maps and the satellite image with the help of the initial rough value of RPCs (the Rational Polynomial Coefficients);find the corresponding...
An underlying assumption in retrievals of biophysical and geological parameters from remotely sensed satellite data is an existence of inter-band relationship. Such relationships are often visualized as isolines in cross plots of reflectance spectra. One type of isolines observed under constant soil properties is the soil isoline, which would provide useful information in retrievals of soil parameters...
In this paper we provide a review of developments in the field of polarimetric SAR interferometry or POLInSAR, beginning with its origins in data from the SIR-C mission in 1994 and culminating in its latest application to Tandem-X, a space-borne single pass X-Band interferometer launched in 2010. Linking these two important developments in technology we trace the parallel development of signal processing,...
In this study, we used the generalized estimating equation (GEE) method to examine the relationship between terrain factors (height, slope and aspect) and NDVI in the western Liaoning, northeast China. Time-series data of NDVI derived from satellite images of the Moderate Resolution Imaging Spectroradiometer (MODIS) were used to show the growing curve of corn field and the impact of terrain factors...
The various applications of polarimetric SAR data have brought to the fore questions of polarimetric calibration. Most polarimetric calibration methods based on distributed targets employed reflection symmetry assumption, which might be inconsistent with the truth due to a possible orientation angle shift, and therefore would skew the polarimetric signatures of targets. In this paper, a model incorporating...
A new edge detector for polarimetric SAR images based on polarimetric whitening filter aiming at making better use of polarimetric information is proposed. The relativity between different polarization channels including the phase difference and correlation efficient is better utilized in the new algorithm. Therefore, the missing rate is reduced, the continuity of detected edges is enhanced, and the...
River bathymetry plays a key role in estimating river discharge as well as improving our modeling capabilities of fluvial geomorphology. Genetic algorithm techniques can be used to derive river bed topography using only water surface elevations and the corresponding temporal and spatial rates of change. Each river bathymetric estimate, also referred to as a solution, is modeled as a successive collection...
The determination of aerosol's effect contains much uncertainty. During quantification of aerosols via remote sensing, surface reflectance error of 0.01 could bring Aerosol Optical Depth (AOD) error of 0.1. In order to avoid this, simultaneous retrieval of AOD and surface properties would be a promising method. In this paper, we present a novel analytic solution to atmospheric radiative transfer equation...
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