TERMIUM Plus^®

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A covariance matrix is generated using the echo returns. The presence of at least one target within a single range cell is detected. A plurality of consecutive pulses are transmitted in a direction of the single range cell within a sufficiently short period so that at least one target remains within the single range cell while the plurality of consecutive pulses are transmitted. An echo signal is sampled from each of the plurality of pulses. An updated covariance matrix is estimated each time the echo signal is sampled. An eigenvalue decomposition is updated each time the covariance matrix is updated. The number of targets in the single range cell is estimated, based on the updated eigenvalue decomposition.  2, fiche 1, Anglais, - covariance%20matrix

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covariance matrix: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  3, fiche 1, Anglais, - covariance%20matrix

Fiche 1,  Justifications,  Français

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La matrice de covariance permet d'obtenir une description des propriétés diffusantes de la cible.  2, fiche 1, Français, - matrice%20de%20covariance

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matrice de covariance : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  2, fiche 1, Français, - matrice%20de%20covariance

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

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The error matrix, also called the covariance matrix, is the inverse of the second derivative matrix of the (log-likelihood or chisquare) function with respect to its free parameters, usually assumed to be evaluated at the best parameter values (the function minimum). The diagonal elements of the error matrix are the squares of the individual parameter errors, including the effects of correlations with the other parameters.  2, fiche 2, Anglais, - covariance%20matrix

Fiche 2,  Justifications,  Français

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Français

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

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Alternative to the correlation matrix, the covariance matrix is used as an error model for the GPS baseline for insertion to the least squares adjustment.  1, fiche 4, Anglais, - covariance%20matrix

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it is also the product of a network adjustment, and reflects the precision of the adjusted coordinates.  1, fiche 4, Anglais, - covariance%20matrix

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Term and definition provided by the Canadian Hydrographic Service.  1, fiche 4, Anglais, - covariance%20matrix

Fiche 4,  Justifications,  Français

Record number: 4, Textual support number: 1 DEF

Solution de remplacement de la matrice de corrélation, la matrice de covariance est utilisée à titre de modèle d'erreur pour la ligne de base GPS à insérer dans la compensation par les moindres carrés. Elle est également un produit d'une compensation de réseau et reflète la précision des coordonnées compensées.  1, fiche 4, Français, - matrice%20de%20covariance

Fiche 4,  Justifications,  Espagnol