Application of Polarization Coherence Tomography to GB-POLInSAR Data

Abstract

Abstract-Recently, a new radar imaging technique -PolarizationCoherence Tomography or PCT -has been proposed in the literature. This technique uses the variation of interferometric coherence with polarization to reconstruct a vertical profile function in penetrable volume scattering. In this paper we apply PCT for the first time to ground-based polarimetric interferometric data. We first demonstrate how a vertical profile function can be efficiently represented as a Fourier-Legendre series and then show how to reconstruct this series up to second order with only single baseline data. Polarimetric tomographic reconstructions of Australian native plants show the consistencies and merits of PCT compared with other coherence based parameter retrieval models of the polarimetric SAR interferometry technique.

Dual-Baseline Coherence Tomography

“…For example, with a single-baseline interferometer, up to three coefficients, a 10 and a 20 from the two observations (amplitude and phase of coherence) together with a 00 = 1 obtained from an additional normalization constraint on the structure function, can be estimated. Single-baseline applications have been considered in [6]- [9], but with the addition of a second baseline (with a different corresponding k z value), we add two further parameters and so can formulate tomography as a 5×5 matrix inversion, as shown in the following, where superscripts A and B now relate to the two baselines used:…”

“…Ground-based radar measurements provide a well-controlled environment for new algorithm development and validation [9]- [11]. To demonstrate practical application of dual-baseline tomography, sample data are employed from one such sensor, the EMSL at JRC-Ispra, Italy [11].…”

A hybird vegetation height inversion method for dual frequency PolInSAR

“…The coherence amplitude algorithm [7] is sensitive to variations in vertical structure of forest and is generally applied to compensate the underestimated height.…”

“…For the L-band data, in order to remove the phase bias and improve the accuracy of surface topography estimation, we employ the method of coherence line [7] to estimate the surface phase. According Equation (1), the accurate surface phase can be calculated as shown in Equation (4).…”