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Communication dans un congrès
On the Use of Variational Adjoint Approach on Wide-Angle Approximation of Parabolic Equation with the Method of Split-Step Wavelet
Abstract : This paper introduces a validation step for inferring atmosphere from RF data in an effort towards an 'refractivity from clutter' (RFC) system. The method retrieves the vertical refractive index distribution point-by-point in the lower troposphere from the measurements sampled in bistatic configuration. The new method utilizes wide-angle parabolic equation (WAPE) solved with the method of split-step wavelet (SSW) as the forward model, which is less computationally costly than the typical method used in the literature. The gradient of the cost function is estimated via the adjoint SSW solver developed by means of the variational adjoint approach. The high-dimensional problem is taken into account via gradient based optimization method. Thus the validation of the gradient is crucial. The accuracy of the new method is validated by comparing the gradient to the method of finite differences.
Littérature citée [5 références]
https://hal-enac.archives-ouvertes.fr/hal-02521101
Contributeur : Rémi Douvenot Connectez-vous pour contacter le contributeur
Soumis le : vendredi 27 mars 2020 - 11:23:16
Dernière modification le : mercredi 3 novembre 2021 - 08:16:56
Contributeur : Rémi Douvenot Connectez-vous pour contacter le contributeur
Soumis le : vendredi 27 mars 2020 - 11:23:16
Dernière modification le : mercredi 3 novembre 2021 - 08:16:56
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