2021
DOI: 10.1109/tap.2021.3060073
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A Variational Adjoint Approach on Wide-Angle Parabolic Equation for Refractivity Inversion

Abstract: Radar systems performance under anomalous propagation conditions can be predicted if the atmosphere is properly known. This paper introduces a tomographic approach to estimate refractivity in the troposphere with an adjoint-based inversion method. A new adjoint model is developed for the two-dimensional wide-angle parabolic equation using variational adjoint approach, to invert refractivity from phaseless data measured with an array of radio receivers in open-sea environment. The obtained adjoint model is vali… Show more

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Cited by 6 publications
(5 citation statements)
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“…To conclude, we note that using this approach allows us to model more precisely the effects of the sea. This is of high importance for the RFC inverse problem [2,3], where an accurate and fast forward model is needed. This latter is studied in Section 3.8 for various sea conditions.…”
Section: Propagation Above the Seamentioning
confidence: 99%
See 3 more Smart Citations
“…To conclude, we note that using this approach allows us to model more precisely the effects of the sea. This is of high importance for the RFC inverse problem [2,3], where an accurate and fast forward model is needed. This latter is studied in Section 3.8 for various sea conditions.…”
Section: Propagation Above the Seamentioning
confidence: 99%
“…In this last numerical test, we study the propagation above the sea from the antenna of a ship, which corresponds to the forward model of RFC [2,3]. The main objective is to show that the surface geometry must be taken into account in this context.…”
Section: Forward Model For the Rfc Problemmentioning
confidence: 99%
See 2 more Smart Citations
“…In [38,39], the inverse problem of retrieving the atmospheric duct structure in equation (1.1) is investigated by the adjoint approach with the regularization technique, where the adjoint is derived from the split-step Fourier parabolic equation method. Then, these methods are extended in [22,23] to the Helmholtz equation in cylindrical coordinates…”
Section: Introductionmentioning
confidence: 99%