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dc.contributor.authorRamos Pérez, Isaac
dc.contributor.authorForte Veliz, Giuseppe Francesco
dc.contributor.authorCamps Carmona, Adriano José
dc.contributor.authorBosch Lluís, Xavier
dc.contributor.authorValencia Domènech, Enric
dc.contributor.authorRodríguez Álvarez, Nereida
dc.contributor.authorHyuk, Park
dc.contributor.authorVall-Llossera Ferran, Mercedes Magdalena
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.date.accessioned2013-01-21T16:58:17Z
dc.date.created2012-06-28
dc.date.issued2012-06-28
dc.identifier.citationRamos, I. [et al.]. Calibration, performance, and imaging tests of a fully digital synthetic aperture interferometer radiometer. "IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing", 28 Juny 2012, vol. 5, núm. 3, p. 723-734.
dc.identifier.issn1939-1404
dc.identifier.urihttp://hdl.handle.net/2117/17449
dc.description.abstractThis work presents the calibration, characterization, and imaging tests of the Passive Advanced Unit-Synthetic Aperture instrument (PAU-SA). PAU-SA is a fully digital -shaped two-dimensional synthetic aperture interferometric radiometer operating at the Global Positioning System (GPS) L1 band ( GHz), conceived as a test-bed for potential technological improvements in future instruments. Calibration of instrumental offsets is performed by looking to a microwave absorber and the “cold” sky. Since the instrument operates in the GPS L1 band, GPS satellites are imaged therefore, a new way to compute the Flat Target Response (FTR) has been devised. Internal phase/amplitude calibration is performed using a new technique that consists of injecting pseudo-random noise signals. Different paths from the input switch to the antennas are calibrated by means of an external beacon. A near-field to far-field transformation is applied to compensate for differences in the propagation paths. Finally, absolute amplitude calibration is achieved by imaging the GPS satellites constellation when pointing to the zenith. Evaluation of the images’ quality in terms of angular resolution, radiometric resolution and precision, show the goodness of the techniques applied to compensate for instrumental errors, the imaging capabilities of the instrument, and demonstrate their applicability in future missions.
dc.format.extent12 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Radionavegació
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Satèl·lits i ràdioenllaços
dc.subject.lcshGlobal Positioning System
dc.subject.lcshArtificial satellites in navigation
dc.subject.otherCalibration
dc.subject.otherGPS
dc.subject.otherimage reconstruction
dc.subject.otherinterferometric radiometer
dc.subject.otherperformance
dc.subject.otherpseudo-random noise
dc.titleCalibration, performance, and imaging tests of a fully digital synthetic aperture interferometer radiometer
dc.typeArticle
dc.subject.lemacSistema de posicionament global
dc.subject.lemacLocalització per satèl·lits, Sistemes de
dc.contributor.groupUniversitat Politècnica de Catalunya. CTE-CRAE - Grup de Recerca en Ciències i Tecnologies de l'Espai
dc.contributor.groupUniversitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
dc.identifier.doi10.1109/JSTARS.2012.2193118
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6197242
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac10740059
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorRamos, I.; Giuseppe Forte; Camps, A.; Bosch, X.; Valencia, E.; Rodriguez, N.; Hyuk, P.; Vall-llossera, M.
local.citation.publicationNameIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
local.citation.volume5
local.citation.number3
local.citation.startingPage723
local.citation.endingPage734


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