Introduction to the new metasensing ground-based SAR: Technical description and data analysis

Rödelsperger, Sabine; Coccia, Alex; Vicente, Daniel; Meta, Adriano

doi:10.1109/igarss.2012.6352542

Cited by 12 publications

(8 citation statements)

References 3 publications

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“…Today, several ground-based radar systems are available, operating in C [22]- [24], X [25], [26] or Ku band [22], [23], [27], [28]. The majority of these systems are based on aperture synthesis, using a moving antenna on a rail.…”

Section: A State Of the Artmentioning

confidence: 99%

Polarimetric Calibration of the Ku-Band Advanced Polarimetric Radar Interferometer

Baffelli

Frey

Werner

et al. 2018

IEEE Trans. Geosci. Remote Sensing

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Abstract-Differential interferometry using groundbased radar systems permits to monitor displacements in natural terrain with high flexibility in location, time of acquisition and revisit time. In combination with polarimetric imaging, discrimination of different scattering mechanisms present in a resolution cell can be obtained simultaneously with the estimation of surface displacement. In this paper we present the pre-processing steps and the calibration procedure required to produce high-quality calibrated polarimetric single-look complex imagery with KAPRI, a new portable Ku-band polarimetric radar interferometer. The processing of KAPRI data into SLC images is addressed, including the correction of beam squint and of azimuthal phase variations. A polarimetric calibration model adapted to the acquisition mode is presented and used to produce calibrated polarimetric covariance matrix data. The methods are validated by means of a scene containing five trihedral corner reflectors. Data pre-processing is assessed by analyzing the oversampled response of a corner reflector and the polarimetric calibration quality is verified by computing polarimetric signatures and residual calibration parameters.

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Section: A State Of the Artmentioning

confidence: 99%

Polarimetric Calibration of the Ku-Band Advanced Polarimetric Radar Interferometer

Baffelli

Frey

Werner

et al. 2018

IEEE Trans. Geosci. Remote Sensing

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“…In this case, the assumed linear function of the refractivity index with respect to a topographic height must be more generalized for estimating a global trend of the APS along the slant range axis. Here we model the refractivity index as a quadratic 2D polynomial function with respect to a topographic height z and a slant range The (8) states the stratified APS model based on the 2D polynomial function 2Dpoly N in (7). The LS regression is then performed to estimate the β similarly as the APS-MRM method [6].…”

Section: A Stratified Aps Modeling and Compensationmentioning

confidence: 99%

“…The performance of the polynomial stratified APS model is first evaluated. In this evaluation, the pixels with mean interferometric coherence higher than 0.85 from the 5 × 3 (range × cross-range) multi-looked images, are used for solving the unknown coefficients β of the polynomial model in (8). The two pairs of the measured differential phase are selected for visualization of estimated phase change of both the APS-MRM and the polynomial stratified APS model along with a slant range.…”

Section: A Investigation Of the Stratified Apsmentioning

confidence: 99%

Iterative Atmospheric Phase Screen Compensation for Near-Real-Time Ground-Based InSAR Measurements Over a Mountainous Slope

Izumi

Zou

Kikuta

et al. 2020

IEEE Trans. Geosci. Remote Sensing

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In this paper, an atmospheric phase screen (APS) compensation algorithm for a near real-time Ground-Based InSAR (GB-InSAR) over a mountainous area is investigated. A novel APS compensation scheme is proposed to compensate the fluctuated APS caused by a spatial 3D inhomogeneous refractivity index distribution without any a priori knowledge of moving location. The proposed method simultaneously addresses to identify moving pixels by a criterion of absolute velocity estimated by the Coherent Pixels Technique (CPT). The proposed method consists mainly of three steps; (1) the stratified APS compensation, (2) identification of moving pixel candidate, and (3) the residual APS (remained APS after (1)) compensation by Kriging interpolation. The steps mentioned above are iteratively applied in order to increase the accuracy of the whole process. In this framework, we develop the 2D quadratic polynomial model of the refractivity index with respect to slant range and topographic height for modeling the stratified APS. Furthermore, a prediction of the residual APS is achieved by applying the IRF-k Kriging interpolation, taking into account the non-stationarity of the residual APS. We evaluate the proposed method using zerobaseline GB-DInSAR data over a mountainous area located in Minami-Aso, Kumamoto, Japan through the near real-time postlandslide measurement campaign.

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“…It is well known that polarimetry can provide highly profitable information in different applications of radar imaging of natural media, such as rough, bare, and vegetated soil, snow, and glaciers: The availability of polarimetric data provided by recent SAR satellite missions has strongly pushed studies based on spaceborn, large scale, data [4]. On the other hand, so far in GB-SAR imaging, this approach has been 2 of 22 rarely used, and only a few case studies have been discussed in the literature [5][6][7][8]. The main reason of this lack of research is probably due to the fact that commercial terrestrial radars do not provide multi-polarization capability, and they usually operate in single co-polar configuration (mostly vertical).…”

Section: Introductionmentioning

confidence: 99%

Ku Band Terrestrial Radar Observations by Means of Circular Polarized Antennas

Luzi

Dematteis

2019

Remote Sensing

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This paper reports some experimental results obtained by means of a commercial apparatus used by many researchers and users, where a pair of novel and specifically developed circular polarized antennas, designed to operate with Ku band-terrestrial radar interferometers, are used alternatively to the most conventional linear vertical polarized horns provided by the manufacturer of the apparatus. These radar acquisitions have been carried out to investigate for the first time the potential of circular polarization (CP) configurations for terrestrial radar interferometers (TRI) applications, aiming at improving monitoring of landslides, mines, and semi-urban areas. The study tries to evaluate whether the circular polarization response of natural and man-made targets can improve the interpretation of the radar images, with respect to the standard approach used in terrestrial radar interferometry, usually carried out in co-polar vertical polarization. The goal is to investigate how different polarization combinations, in terrestrial radar interferometry, affect the coherence and amplitude dispersion of natural media, potentially improving the identification of stable scatter.

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Introduction to the new metasensing ground-based SAR: Technical description and data analysis

Cited by 12 publications

References 3 publications

Polarimetric Calibration of the Ku-Band Advanced Polarimetric Radar Interferometer

Polarimetric Calibration of the Ku-Band Advanced Polarimetric Radar Interferometer

Iterative Atmospheric Phase Screen Compensation for Near-Real-Time Ground-Based InSAR Measurements Over a Mountainous Slope

Ku Band Terrestrial Radar Observations by Means of Circular Polarized Antennas

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