Search results for " x-band"

showing 3 items of 3 documents

A Comparison between Drifter and X-Band Wave Radar for Sea Surface Current Estimation

2016

This paper deals with exploitation of the wave radar system for sea surface current estimation in a coastal zone. In particular, we present the results of the processing of the radar data collected by an X-band marine radar installed in Capo Granitola site, which is located in the south-west part of Sicily, on 15 May 2015. The effectiveness of the data processing is analyzed by comparing the wave radar estimated sea surface current with that provided by the Lagrangian drifters along its movement trajectory. During the measurement campaign, three drifter releases are carried out and for each one the comparison is provided in terms of the mean error and standard deviation. In addition, we rep…

010504 meteorology & atmospheric sciencesmarine X-band radar0211 other engineering and technologiesX bandsea state monitoring02 engineering and technologySea state01 natural sciencesStandard deviationlaw.inventionlawLagrangian driftersRadarsea surface current estimationlcsh:SciencePhysics::Atmospheric and Oceanic Physics021101 geological & geomatics engineering0105 earth and related environmental sciencesRemote sensingSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaGeodesyDrifterWavelengthWave radarGeneral Earth and Planetary Scienceslcsh:QSignificant wave heightGeologyRemote Sensing
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A DRO-based X-band injection-locked amplifier without input non-reciprocal elements

2009

Conventional design of injection-locked amplifiers (ILA's) implies the use of a non-reciprocal (ferrite, usually) element for separating the input signal from the synchronized output signal. In this paper a novel topological structure is proposed which permitted the realization of a wide-band, transmission-type, ILA with no need for separating input-port isolator or preamplifier. The prototype, realized in HMIC technology, while intended only as demonstrator of the newly proposed approach in the design of ILA's, shows quite satisfactory performances at X-band, with a simple, compact and low-cost structure.

Engineeringbusiness.industryPreamplifierAmplifierBandwidth (signal processing)IsolatorX bandElectrical engineeringila rila tila injection x-band branchline coupler dielectric resonatorDielectric resonatorSettore ING-INF/01 - ElettronicaElectronic engineeringFerrite (magnet)businessReciprocal2009 European Conference on Circuit Theory and Design
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Time series of Cosmo-SkyMed data for landcover classification and surface parameter retrieval over agricultural sites

2012

This paper reports on the results of an Italian project aimed at investigating the use of X-band COSMO-SkyMed (CSK) SAR data for applications in agriculture and hydrology. Existing classification and retrieval algorithms have been tailored to CSK data and time series of crop, leaf area index and soil moisture maps have been retrieved and assessed through the comparison with in situ data collected over three agricultural sites. In addition, the CSK-derived surface parameters have been integrated into crop growth and hydrologic models and the resulting improvements have been assessed. Results indicate that multi-temporal dual-polarized CSK data are very well-suited for agricultural crop class…

Synthetic aperture radarSeries (mathematics)Contextual image classificationbusiness.industryCOSMO-SkyMedHydrological modellingSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaVegetationCOSMO-SkyMed; SAR; X-bandHydrology (agriculture)AgricultureEnvironmental scienceSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliSAR COSMO-SkyMed X-bandX-bandLeaf area indexbusinessSettore ICAR/06 - Topografia E CartografiaRemote sensingSAR
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