Space-Based Radar Polarimetry, Demythologized

Raney, R. K.

doi:10.1002/essoar.10511388.1

Cited by 1 publication

(1 citation statement)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The prf must be doubled for two reasons, to respect the Nyquist lower sampling bound for each channel, and to assure coherence between the respective cross-polarized backscatter constituents. Quad-pol's principal user disincentives include major restrictions on potential area coverage, the impossibility to implement ScanSAR, limited span of radar incident angles, and doubled data burden per pixel [18,19]. One advantage of quad-pol is that its complete scattering matrix supports generation of polarimetric signatures [17], based on a transfer function relationship in the Stokes (averaged power) domain.…”

Section: Modern Quad-pol Radarmentioning

confidence: 99%

Radar Polarimetry: Classical Versus Quad-Pol Methodologies

Raney

2024

IEEE Geosci. Remote Sensing Lett.

View full text Add to dashboard Cite

In the synthetic aperture radar (SAR) context, "fully polarized" has two conflicting meanings: measurement of the scattering matrix, or an output image product that is a complete polarimetric characterization of an observed scene. Modern quad-pol SARs focus on the scattering matrix, while the typical user's objective is a fully polarimetric output product. Conventional quad-pol polarimetric retrieval processing relies on matrix decomposition, which leads to output products that are not fully polarimetric. The Stokes parameters from classical radar architectures are fully polarimetric, thus meeting users' objectives. A quad-pol SAR will produce fully polarimetric output products if and only if it is polarization-conserving, via the Mueller matrix for example. On this path, decomposition algorithms are not needed. Approximations and models are not needed. Classical full-polarimetry-which has no use for the scattering matrix-achieves the same goal by transmitting circular polarization, and receiving two orthogonal polarizations, sufficient to evaluate the Stokes vector. Circular polarization (either L or R) coupled with a dual-polarized receiver are required. Both classical and user-oriented quad-pol approaches are founded on fundamental principles from classical optics, the Stokes parameters. These provide a full polarimetric portrait of the incoming electromagnetic field, including polarized and unpolarized constituents. Both approaches share a requirement for circularly polarized transmissions, actually realized in the classical precedent, but virtually emulated in a quad-pol radar only when polarizationconserving methods are used.

show abstract

Section: Modern Quad-pol Radarmentioning

confidence: 99%

Radar Polarimetry: Classical Versus Quad-Pol Methodologies

Raney

2024

IEEE Geosci. Remote Sensing Lett.

View full text Add to dashboard Cite

show abstract

Space-Based Radar Polarimetry, Demythologized

Cited by 1 publication

References 17 publications

Radar Polarimetry: Classical Versus Quad-Pol Methodologies

Radar Polarimetry: Classical Versus Quad-Pol Methodologies

Contact Info

Product

Resources

About