@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

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              In this thesis, we present the definition, the construction and the tests of a new V.H.F. multifrequency and multipolarization radar.<br />This system called M.O.S.A.R., radar for the analysis of target resonance (in french : Maquette Orientée pour un Système d'Analyse de Résonances) deals with the aircraft Radar Cross Section measurements in the low V.H.F. frequency band (20 - 100 MHz).<br />At first, we present the basic characteristics of this project such as the pulse width, the pulse rate, the number of frequency, ... . In a second part, we describe the M.O.S.A.R. system. It consists of a coherent, pulsed, monostatic radar controled by a computer, which is able to measure and record the aircraft backscattered signals. Two different antenna arrays are used for the transmitter and the receiver, each of them constitued by four log-periodic antennas. Then, target parameters (magnitude, phase and Doppler frequency) are obtained by processing methods based on autoregressive spectrum analysis algorithms using forward and backward linear prediction.<br />Finally, we characterise the behavior and the limitations of this radar and we present several experimental results which confirm the theoretical developments.
            """ ;
    dct:identifier "tel-00085136" ;
    dct:issued "2026-05-10T02:57:04.026439"^^xsd:dateTime ;
    dct:language "fr" ;
    dct:modified "2026-05-10T02:57:04.026443"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Définition, Réalisation et Tests d'un radar VHF Multifréquence et Multipolarisation - Projet MOSAR" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
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    dcat:keyword "acquisition-de-signaux",
        "analyse-spectrale-haute-resolution",
        "antennes-log-periodique",
        "emetteur",
        "furtivite",
        "infoeu-reposemanticsdoctoralthesis",
        "multifrequence",
        "multipolarisation",
        "radar",
        "recepteur",
        "reseaux-dantennes",
        "ser",
        "spisignalengineering-sciences-physicssignal-and-image-processing",
        "theses",
        "vhf" ;
    dcat:landingPage <https://theses.hal.science/tel-00085136> .

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    dct:issued "2026-05-10T02:57:04.034272"^^xsd:dateTime ;
    dct:modified "2026-05-10T02:57:04.011816"^^xsd:dateTime ;
    dct:title "Définition, Réalisation et Tests d'un radar VHF Multifréquence et Multipolarisation - Projet MOSAR" ;
    dcat:accessURL <https://theses.hal.science/tel-00085136> .

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