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dc.contributor.authorBará Temes, Francisco Javier
dc.contributor.authorCamps Carmona, Adriano José
dc.contributor.authorCorbella Sanahuja, Ignasi
dc.contributor.authorTorres Torres, Francisco
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.date.accessioned2010-11-03T12:43:24Z
dc.date.available2010-11-03T12:43:24Z
dc.date.created2001-02
dc.date.issued2001-02
dc.identifier.citationBara, F. [et al.]. The specification of channel filters for an interferometric radiometer. "Radio science", Febrer 2001, vol. 36, núm. 2, p. 97-106.
dc.identifier.issn0048-6604
dc.identifier.urihttp://hdl.handle.net/2117/10083
dc.description.abstractDifferences among the channels that form an interferometric radiometer result in amplitude and phase errors in the cross correlations measured from the signals collected by each pair of antennas (visibility samples). Since point source calibration of a satellite-embarked instrument operating in a radio astronomy protected band is, in principle, not possible, and although separable phase errors can be corrected, the nonseparable ones produce an irrecoverable loss of information and have to be kept below specified limits. Preliminary work performed by the authors established basic requirements on the channel transfer function so as to meet these strict specifications imposed by proper calibration and inversion procedures. These requirements were set, from a simple filter model, in terms of three basic parameters: center frequency, bandwidth, and overall group delay. The purpose of this work is, for any kind of filter, to translate these requirements into a given insertion loss mask that must be satisfied by all filters so as to keep nonseparable error terms under certain specified bounds. The numerical results and computer simulations presented are based on the specifications of MIRAS, a two-dimensional aperture synthesis radiometer currently under study by the European Space Agency, and its proposed in-orbit calibration procedure.
dc.format.extent10 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació
dc.subject.lcshAntenna arrays
dc.subject.lcshSignal theory (Telecommunication)
dc.titleThe specification of channel filters for an interferometric radiometer
dc.typeArticle
dc.subject.lemacSenyal, Teoria del (Telecomunicació)
dc.contributor.groupUniversitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
dc.rights.accessOpen Access
local.identifier.drac789781
dc.description.versionPostprint (published version)
local.citation.authorBara, F.; Camps, A.; Corbella, I.; Torres, F.
local.citation.publicationNameRadio science
local.citation.volume36
local.citation.number2
local.citation.startingPage97
local.citation.endingPage106


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