Ku Band Terrestrial Radar Observations by Means of Circular Polarized Antennas

Abstract

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.

A multidisciplinary investigation of deep-seated landslide reactivation triggered by an extreme rainfall event: a case study of the Monesi di Mendatica landslide, Ligurian Alps

“…11, we plotted the postevent velocity projected along the slope (V SLOPE ) of both ascending and descending Sentinel-1 datasets. The rotational landslide (L1) was not subject to any continuous monitoring, but some short experimental GB-SAR monitoring campaigns were performed in 2017 and 2018 (Luzi and Dematteis 2019). We could only estimate the displacement by comparing the pre-and postevent DTMs and analysing the aerial photographs.…”

Analysis of Ground Based SAR Images Acquired In A Small Urban Area Using Diverse Polarization Configurations

“…To evaluate the actual capability of the radar system in separating the different polarization configurations, several radar acquisitions in real aperture mode (RAR) have been carried out, analyzing the response of single targets: in [9] the reader can find a detailed description of the tests carried out to this aim. In this paper, we report some interesting results focused on the image applications, i.e.…”

“…DA and COH for the different combinations analyzed in the short interval series of image acquisition. Map coordinates are expressed in meters for range direction, and radians for azimuth direction (After[9]).…”

Passive Bistatic Ground-Based Synthetic Aperture Radar: Concept, System, and Experiment Results

“…More synchronized receivers can be employed to generate a high-resolution digital elevation model (DEM) of the observation scene by setting a proper spatial baseline. Moreover, since both the right-hand and left-hand circular polarizations have been employed by the satellite digital TV broadcasting in Japan, a PB-GB-SAR system that can measure different polarizations should be employed to have a better understanding of the imaging scene, like that in GB-SAR [19][20][21]. Furthermore, in the derivation of the displacement estimation formula in Equation 35, the assumption of "the target only has the displacement along the LoS direction of the surveillance antenna" has been used.…”

“…For example, by using a transponder based monostatic and bistatic GB-SAR system or several conventional GB-SAR/MIMO systems simultaneously, the 2D or 3D displacement vector of the target can be obtained [14][15][16][17][18]. Furthermore, advanced polarimetric GB-SAR imaging and interferometry techniques have also been studied [19][20][21]. More details and potential development directions of GB-SAR can be found in [1,3,8].…”