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Star in the sky, the SMOS playload: MIRAS / M. Drinkwater in ESA bulletin, n° 137 (February 2009)  

Public [article]  inESA bulletin > n° 137 (February 2009) . - pp 16 - 21 Titre : Star in the sky, the SMOS playload: MIRAS Type de document : Article/Communication Auteurs : M. Drinkwater, Auteur ; M. Martin-Neira, Auteur ; Yann H. Kerr, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 16 - 21 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Missions spatiales [Termes IGN] charge utile [Termes IGN] Microwave Imaging Radiometer with Aperture Synthesis [Termes IGN] SMOS Résumé : (Auteur) MIRAS is more than just the payload of SMOS. It is a radio telescope pointed towards Earth, an instrument that has challenged the fundamental theories of radio astronomy, and made a major contribution to science even before being launched. Copyright European Space Agency Numéro de notice : A2009-057 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article DOI : sans En ligne : http://www.esa.int/esapub/bulletin/bulletin137/bul137c_martin_neira.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29687 [article]

MIRAS end-to-end calibration: application to SMOS L1 processor / I. Corbella in IEEE Transactions on geoscience and remote sensing, vol 43 n° 5 (May 2005)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 43 n° 5 (May 2005) . - pp 1126 - 1134 Titre : MIRAS end-to-end calibration: application to SMOS L1 processor Type de document : Article/Communication Auteurs : I. Corbella, Auteur ; F. Torres, Auteur ; et al., Auteur Année de publication : 2005 Article en page(s) : pp 1126 - 1134 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] bruit (théorie du signal) [Termes IGN] erreur [Termes IGN] étalonnage radiométrique [Termes IGN] Microwave Imaging Radiometer with Aperture Synthesis [Termes IGN] radiomètre à hyperfréquence [Termes IGN] reconstruction d'image [Termes IGN] Soil Moisture and Ocean Salinity Mission [Termes IGN] température de luminance Résumé : (Auteur) End-to-end calibration of the Microwave Imaging Radiometer by Aperture Synthesis (MIRAS) radiometer refers to processing the measured raw data up to dual-polarization brightness temperature maps over the earth's surface, which is the level 1 product of the Soil Moisture and Ocean Salinity (SMOS) mission. The process starts with a self-correction of comparators offset and quadrature error and is followed by the calibration procedure itself. This one is based on periodically injecting correlated and uncorrelated noise to all receivers in order to measure their relevant parameters, which are then used to correct the raw data. This can deal with most of the errors associated with the receivers but does not correct for antenna errors, which must be included in the image reconstruction algorithm. Relative S-parameters of the noise injection network and of the input switch are needed as additional data, whereas the whole process is independent of the exact value of the noise source power and of the distribution network physical temperature. On the other hand, the approach relies on having at least one very well-calibrated reference receiver, which is implemented as a noise injection radiometer. The result is the calibrated visibility function, which is inverted by the image reconstruction algorithm to get the brightness temperature as a function of the director cosines at the antenna reference plane. The final step is a coordinate rotation to obtain the horizontal and vertical brightness temperature maps over the earth. The procedures presented are validated using a complete SMOS simulator previously developed by the authors. Numéro de notice : A2005-216 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2004.840458 En ligne : https://doi.org/10.1109/TGRS.2004.840458 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27353 [article]

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MIRAS reference radiometer: a fully polarimetric noise injection radiometer / A. Colliander in IEEE Transactions on geoscience and remote sensing, vol 43 n° 5 (May 2005)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 43 n° 5 (May 2005) . - pp 1135 - 1143 Titre : MIRAS reference radiometer: a fully polarimetric noise injection radiometer Type de document : Article/Communication Auteurs : A. Colliander, Auteur ; S. Tauriainen, Auteur ; et al., Auteur Année de publication : 2005 Article en page(s) : pp 1135 - 1143 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] bruit (théorie du signal) [Termes IGN] corrélation automatique de points homologues [Termes IGN] étalonnage d'instrument [Termes IGN] formule de Stokes [Termes IGN] Microwave Imaging Radiometer with Aperture Synthesis [Termes IGN] polarisation Résumé : (Auteur) A prototype reference radiometer for the Microwave lmaging Radiometer Using Aperture Synthesis (MIRAS) instrument of the Soil Moisture and Ocean Salinity satellite has been developed. The reference radiometer is an L-band fully polarimetric noise injection radiometer (NIR). The main purposes of the NIR are : 1) to provide precise measurement of the average fully polarimetric brightness temperature scene for absolute calibration of the MIRAS image map and 2) to measure the noise temperature level of the noise distribution network of the MIRAS for individual receiver calibration. The performance of the NIR is a decisive factor of the MIRAS performance. In this paper, we present the operation principles and calibration procedures of the NIR, a measurement technique called blind correlation making measurements of full Stokes vector possible with the noise injection method, and finally experimental results verifying certain aspects of the design. Numéro de notice : A2005-217 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2004.840667 En ligne : https://doi.org/10.1109/TGRS.2004.840667 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27354 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-05051	RAB	Revue	Centre de documentation	En réserve L003	Disponible