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Calibration, performance, and imaging tests of a fully digital synthetic aperture interferometer radiometer
dc.contributor.author | Ramos Pérez, Isaac |
dc.contributor.author | Forte Veliz, Giuseppe Francesco |
dc.contributor.author | Camps Carmona, Adriano José |
dc.contributor.author | Bosch Lluís, Xavier |
dc.contributor.author | Valencia Domènech, Enric |
dc.contributor.author | Rodríguez Álvarez, Nereida |
dc.contributor.author | Hyuk, Park |
dc.contributor.author | Vall-Llossera Ferran, Mercedes Magdalena |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions |
dc.date.accessioned | 2013-01-21T16:58:17Z |
dc.date.created | 2012-06-28 |
dc.date.issued | 2012-06-28 |
dc.identifier.citation | Ramos, 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.issn | 1939-1404 |
dc.identifier.uri | http://hdl.handle.net/2117/17449 |
dc.description.abstract | This 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.extent | 12 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Radionavegació |
dc.subject | Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Satèl·lits i ràdioenllaços |
dc.subject.lcsh | Global Positioning System |
dc.subject.lcsh | Artificial satellites in navigation |
dc.subject.other | Calibration |
dc.subject.other | GPS |
dc.subject.other | image reconstruction |
dc.subject.other | interferometric radiometer |
dc.subject.other | performance |
dc.subject.other | pseudo-random noise |
dc.title | Calibration, performance, and imaging tests of a fully digital synthetic aperture interferometer radiometer |
dc.type | Article |
dc.subject.lemac | Sistema de posicionament global |
dc.subject.lemac | Localització per satèl·lits, Sistemes de |
dc.contributor.group | Universitat Politècnica de Catalunya. CTE-CRAE - Grup de Recerca en Ciències i Tecnologies de l'Espai |
dc.contributor.group | Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció |
dc.identifier.doi | 10.1109/JSTARS.2012.2193118 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6197242 |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 10740059 |
dc.description.version | Postprint (published version) |
dc.date.lift | 10000-01-01 |
local.citation.author | Ramos, I.; Giuseppe Forte; Camps, A.; Bosch, X.; Valencia, E.; Rodriguez, N.; Hyuk, P.; Vall-llossera, M. |
local.citation.publicationName | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
local.citation.volume | 5 |
local.citation.number | 3 |
local.citation.startingPage | 723 |
local.citation.endingPage | 734 |
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