Volume Structure Retrieval Using Drone-Based SAR Interferometry with Wide Fractional Bandwidth
Kim S, Krieger G, Villano M (2024)
Publication Type: Journal article
Publication year: 2024
Journal
Book Volume: 16
Article Number: 1352
Journal Issue: 8
DOI: 10.3390/rs16081352
Abstract
Synthetic aperture radar (SAR) interferometry (InSAR) is a well-established remote sensing technique capable of providing accurate topographic information of an area. Multiple scattering occurring at different heights within a single resolution cell, however, cannot be resolved using a single baseline and results in a degradation of the height accuracy. Techniques such as polarimetric InSAR and SAR tomography tackle this problem using additional measurements to obtain the three-dimensional structure of the volume. However, polarimetry-based methods assume orthogonal and deterministic scattering mechanisms and tomography requires numerous observations. This paper presents a novel approach to retrieving the three-dimensional structure of semitransparent media using wide fractional bandwidth InSAR. The frequency dependency of the InSAR coherence is exploited to retrieve the three-dimensional structure, assuming that signals with wide fractional bandwidth are available, as is the case for unmanned aerial vehicles (UAVs) or drones. As the extinction is, in general, frequency-dependent, a third observation may improve the inversion results. Simulations of different scenarios show that the frequency profile can be inverted to obtain information about the three-dimensional scattering structure. The acquired data also enable retrieval of the phase center depth as a function of frequency. This method allows for frequent and accurate monitoring of semitransparent targets, e.g., forests and vegetation, using a swarm of two or three drones.
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Germany (DE)How to cite
APA:
Kim, S., Krieger, G., & Villano, M. (2024). Volume Structure Retrieval Using Drone-Based SAR Interferometry with Wide Fractional Bandwidth. Remote Sensing, 16(8). https://doi.org/10.3390/rs16081352
MLA:
Kim, Sumin, Gerhard Krieger, and Michelangelo Villano. "Volume Structure Retrieval Using Drone-Based SAR Interferometry with Wide Fractional Bandwidth." Remote Sensing 16.8 (2024).
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