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For a variety of oceanographic applications, airborne LIDAR is very attractive, because of its ability to cover large areas in a short amount of time and at low cost compared with traditional research vessel surveys. One application we have investigated is the detection of plankton in the ocean. We have found that zooplankton layers can be detected, structure within those layers can be tracked, and...
This article presents step-by-step applied methodology to design a 905-nm 5-kHz rep. rate diode-laser biaxial lidar ceilometer prototype beginning from the definition of initial specs, and related trade-offs to the first measurement tests. It is shown how key variables such as the received and background power, the range-dependent signal-to-noise ratio (SNR), the integration time, and the overlap...
Recently, a novel general method for the contextual reconstruction of cloud-contaminated areas in multitemporal multispectral images has been proposed in the literature. Though promising, this method does not fully exploit all available information, thus leaving room for further methodological enhancements. The aim of this work is to improve the contextual reconstruction process by opportunely capturing...
It is a challenging problem to automatically register the SAR and optical satellite images in remote sensing applications. In this paper, a novel intensity based multiscale registration method using steerable Simoncelli filters is proposed to register JERS-1 SAR and ASTER images. The mutual information is used as the similarity measure, and a hybrid search technique is used to do the parameter optimization...
Research on road extraction from digital imagery is motivated by the need for data acquisition and update for geographic information systems (GIS). Roads usually have parallelism of road sides, and on the images, especially the edge map, there are dual edges for each road. In this paper, we propose an approach for automatically extracting road from ETM panchromatic image with a resolution of 15 meters...
This contribution addresses the utilization of near field 3D-SAR imaging algorithms applied to radar data from an ultra wideband (UWB) ground penetrating radar (GPR) system. The measured data were collected at the test field of the multi sensor mine signature (MsMs) group at the European Joint Research Centre (JRC) in Ispra/IT. The layout of this test field was designed for the more difficult problem...
This paper addresses object recognition problem in SAR images with SVM classifier; the work has been mainly focused on feature vector definition. Actually, each object is represented by a feature vector and SVM aims to estimate the best hyperplanes that separate classes in the feature space. Very robust definition of feature vector is proposed and tested on real data (MSTAR database). Confusion matrices...
Following SPOT satellite family, PLEIADES-HR is a high resolution optical earth observation system developed by CNES and consisting in two satellites with a first launch by the end of 2009. Pleiades-HR will deliver both 70 cm Panchromatic images and 2.8 m multispectral (blue-green-red-near infrared) images with a 21km swath. As for SPOT images, Pleiades-HR ground segment includes a systematic and...
Geochronological dating with the fission-track method is based on time-consuming counts of the spontaneous and induced tracks. Automatic extraction and identification of tracks would not only improve the speed of track counting but also eliminate variation due to the observer. Pixel values alone are not enough to distinguish between tracks and background. Traditional pixel-based approaches are therefore...
A two-step electromagnetic detection procedure is proposed to characterize a dielectric obstacle buried at low depth under a rough surface from single frequency and multiple incidence data. First, a properly defined correlation function is constructed to provide an estimation of the surface roughness. Second, this surface profile geometry is introduced into a finite element code thanks to a conformal...
The aim of this work is to exploit the MUSIC algorithm performance in order to enhance target separability in range and azimuth, i.e. achieve point targets separation inside a resolution cell. Simulations have been done in order to plan and check the feasibility of a super-resolution experiment that took place in September 2006 on the test site of Oberpfaffenhofen (Germany). The data set has been...
Foliage obscured man-made targets detection and identification is of great interest to many applications. In this paper, the backscattered laser signals from a multiwavelength polarimetric lidar were used to detect a vehicle hidden inside a vegetated area. The polarimetric reflectance data from the lidar at two separate laser wavelengths at 1064 nm and 532 nm revealed distinct target characteristics...
In this paper, the cross validation algorithm is used to estimate the number of clusters for the unsupervised classification of fully polarimetric SAR data. Three different cross validation algorithms are applied for comparison, which are the dispersion measure method, the V-fold cross validation (VFCV) and the Monte-Carlo cross validation (MCCV). Our current experiments show that the dispersion measure...
Radar Polarimetry, Radar Interferometry and Polarimetric SAR Interferometry represent the current culmination in active 'Microwave Remote Sensing' technology, but we still need to progress considerably more 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...
We present a study of the polarimetric information content of dual-pol imaging modes, e.g. (HH, HV) and (VV, VH), and compare these against full quad-pol datasets. We discuss classification accuracies for various dual-pol datasets over several terrain/vegetation types with respect to the full quad-pol classification. The linear polarization modes implemented on space borne SAR systems are of primary...
In this work, a preliminary study on the use of polarimetric persistent scatterers for differential interferometric applications within an urban environmental is presented. The PolSAR measurements campaign that the RSLab of UPC is carrying on in the village of Salient using an X-Band ground- based SAR sensor is first described. The work is then focused on the additional information the knowledge of...
Soil moisture retrieval from passive microwave remote sensing over densely vegetated areas, such as forests, has become a pertinent subject in the light of ESA's upcoming soil moisture and ocean salinity (SMOS) mission. Even though it is probably not possible to retrieve soil moisture over forested areas with the accuracy required by SMOS, understanding forest radiative transfer properties at L-band...
Dual-polarization and dual-frequency radar observables are simulated at 3, 35, and 94 GHz frequencies for remote sensing of clouds. Their use in ice crystal classification, ice water content and particle size estimation are evaluated.
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