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Journal articles
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 validated considering propagation through range-independent medium over flat perfectly-electric-conducting surface at horizontal polarization. The ill-posedness of the regarded inverse problem is shown with the optimization landscapes. The parametric study indicates the potential use of this method as a refractivity gradient retrieval system under certain circumstances.
https://hal-enac.archives-ouvertes.fr/hal-03156207
Contributor : Laurence Porte <>
Submitted on : Tuesday, March 2, 2021 - 1:34:18 PM
Last modification on : Tuesday, March 2, 2021 - 4:44:28 PM
Long-term archiving on: : Monday, May 31, 2021 - 6:48:36 PM
Contributor : Laurence Porte <>
Submitted on : Tuesday, March 2, 2021 - 1:34:18 PM
Last modification on : Tuesday, March 2, 2021 - 4:44:28 PM
Long-term archiving on: : Monday, May 31, 2021 - 6:48:36 PM
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