PolTimeSAR: Link between the measurement of a time series of N Jones vectors, and the measurement of a single Stokes vector integrating all these measurements. Application to (HH,HV) or (VH,VV) SAR time series - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2024

PolTimeSAR: Link between the measurement of a time series of N Jones vectors, and the measurement of a single Stokes vector integrating all these measurements. Application to (HH,HV) or (VH,VV) SAR time series

Résumé

This paper addresses radar time series acquired with two polarization channels, one copolar and the other contrapolar. We show that the Eigenvalue decomposition of the coherence-covariance matrix of the complex Jones vectors contains the same information as the Stokes vector that would have been obtained by integrating all measurements into a single Stokes intensity measurement. We use two main parameters of this equivalent Stokes vector: its degree of polarization and its principal orientation. We then proposed two polarimetric decompositions: the "Equivalent-Stokes" representation, totally independent of the total intensity, and the "Polarimetric with main orientation" representation. We test these decompositions on the (HH,HV) Tandem-X, and (VV,VH) Sentinel-one time series of the same area.
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Dates et versions

hal-04045501 , version 1 (24-03-2023)
hal-04045501 , version 2 (23-08-2024)

Identifiants

  • HAL Id : hal-04045501 , version 2

Citer

Elise Colin. PolTimeSAR: Link between the measurement of a time series of N Jones vectors, and the measurement of a single Stokes vector integrating all these measurements. Application to (HH,HV) or (VH,VV) SAR time series. 2024. ⟨hal-04045501v2⟩
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