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Interferometrie Synthetic Aperture Radar (InSAR) can derive accurate 3D information with image acquiring all time and all weather. But the accuracy of derived 3D information is heavily determined by the length of perpendicular baseline. We know that the longer baseline is, the more accurate Digital Elevation Model (DEM) can be derived in condition of other parameters are the same. Meanwhile the phase...
This study provides a comparison of built-up area detection methods from Sentinel-1A SAR images. The selected methods are based on local area statistics (speckle divergence and difference between the local mean and local median) and repeat-pass interferometric coherence. The dataset comprises VV and VH polarization SAR images acquired during ascending and descending orbits over two study areas in...
InSAeS4 is an Italian X band airborne SAR system, recently upgraded to a multi-antenna interferometric configuration. The system is able to acquire single pass across-track and along-track multi-baseline data with different acquisition modes characterized by different geometric resolutions and across-track swaths. In recent work we have analyzed the high resolution InSAeS4 products (obtained by transmitting...
In this paper we investigate the surface displacement pattern before and after the 2011 Tohoku earthquake using persistent scatterer interferometry of ALOS/PALSAR and TerraSAR-X images. For confirming the accuracy of the estimated displacement, interferometric phase components were evaluated and simulated data were created. Using the simulated data, the accuracy of filtering methods to mitigate tropospheric...
In the recent years, multi-channel Interferometric SAR (InSAR) techniques have proved to be effective in reconstructing the Digital Elevation Model (DEM) by unwrapping the interferometric phase. Commonly, multi-baseline or multi-frequency configurations are adopted for this aim. In this paper, the possibility of jointly exploiting multi-baseline and multi-frequency approaches for SAR interferometry...
The precision of the mutilsquint methods effects by several factors. This paper deduces the effects of these factors on the multisquint estimation accuracy. Expression of the estimation accuracy is deduced, which provides theoretical bases for the parameter choice and system design of the airborne interferometric SAR.
ALOS-2 satellite has been successfully launched by JAXA on May 24th 2014, it is equipped with an L-Band (PALSAR-2) fully polarimetric SAR. Many improvements have been made with respect to the former ALOS satellite: the exploitation of a dual receiving antenna allows to broaden the imaged swath whereas spotlight mode ensures a very high resolution on a specific location. The revisit time has been lowered...
Despite several studies using the multiple-aperture interferometry (MAI) technique, X-band SAR has rarely been applied to MAI-based studies due to their shorter decorrelation timescale. However, the relatively short antenna length and high temporal resolution of the COSMO-SkyMed X-band SAR system provides an opportunity to measure the precise displacement in the along-track direction. In this study,...
The accuracy of COSMO-SkyMed DEMs is investigated using StripMap mode images, acquired during the interferometric Tandem-Like mission characterized by a temporal baseline of 24 hours and spatial baselines maintained around 150–200 m. Some Couples of both Ascending and Descending interferometric pairs, acquired on selected test sites located in the California have been processed using the open source...
This paper is focused on an operational case study related to the adoption of a Multi-Temporal Coherence (MTC) color composite approach to support monitoring activities of volcanic eruption events. A specific case study related to the volcanic eruption in Fogo Island (Cape Verde), which started on late November 2014 will be presented and discussed. A MTC analysis based on data acquired by the COSMO-SkyMed...
The TanDEM-X mission aims the generation of an accurate global Digital Elevation Model (DEM). On the other hand, due to their flexibility regarding baseline configuration, frequency of acquisition, time and revisit time, airborne SAR interferometers remain viable for the generation of DEMs with very high vertical and horizontal accuracies at a local scale. In this paper, we present an experiment demonstrating...
With this work, we present a method for the detection of alpine permafrost surface deformations by using DInSAR (Differential SAR Interferometry) technique, integrating RADARSAT-2 and COSMO-SkyMed data through Support Vector Machine (SVM). On our test dataset, the combination of the two sensors produces an increase of classification accuracy equal to 8.5% with respect to the case in which only one...
The results of a two-year precision agriculture project have clearly demonstrated that TanDEM-X can successfully classify crops morphology through cultivation period. It has been found that TanDEM-X mission is capable of tracking the crop height, and the accuracy of the height estimation depends on the crop morphology, which causes a diversity between canopy top and acquisition phase center. In this...
EEG based biometric system can be used for authentication, with advantages like confidentiality retention and forgery prevention. Signals which are taken from maximum brain regions show some sort of unique information that can be used for extracting the subject dependent pattern. This paper presents an approach to find the relationships among signals generated in different brain regions which give...
Interferometric Synthetic Aperture Radar (InSAR) is a remote sensing technology used for estimating displacement of the earth's surface. Phase unwrapping is the most important step in InSAR processing and relies on successful selection of points that appear stable across a set of satellite images taken over time. This paper presents a new algorithm for selecting these points, a problem known as persistent...
In this study, we compared several classifiers for the supervised distinction between normal elderly and Alzheimer's disease individuals, based on resting state electroencephalographic markers, age, gender and education. Three main preliminary procedures served to perform features dimensionality reduction were used and discussed: a Support Vector Machines Recursive Features Elimination, a Principal...
Earthquake is one of the most catastrophic disasters to affect mankind especially in urban areas. Reliable and fast collapsed building detection is vitally important to timely rescue and scientific decision making. A modified detection method for collapsed buildings is proposed in this paper by jointly using interferometric information and polarimetric information. The method was tested on two single-polarimetric...
The P-band ultra-wideband synthetic aperture radar interferometry (InSAR) not only has the capability of foliage penetration, but also has the advantage in determining the absolute interferometric phase, which plays a key role in the InSAR data processing. In this paper, a novel absolute phase determination approach for P-band UWB InSAR is presented. A reference phase is generated from the registration...
This paper proposes a texture feature which is applied on human breast Optical Coherence Microscopy (OCM) images to classify different types of breast tissues. Inspired by local binary pattern (LBP) texture features, a new variant of LBP feature, block based LBP (BLBP) is proposed. Instead of representing intensity differences between neighbors and a center pixel, BLBP feature extracts the intensity...
In this paper, a method is proposed to predict the putt outcomes of golfers based on their electroencephalogram (EEG) signals recorded before the impact between the putter and the ball. This method can be used into a brain-computer interface system that encourages golfers for putting when their EEG patterns show that they are ready. In the proposed method, multi-channel EEG trials of a golfer are...
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