IN005-07
Developing a data library for GPR responses to lava tubes

Monday, 7 December 2020: 19:18
Virtual
Sanaz Esmaeili1, Sarah Kruse2, Sajad Jazayeri1, Kathleen Grady-Weil3, Soraya Alfred3, Patrick Whelley4, Jacob A Richardson2, Ernest Bell5, William Brent Garry4 and Kelsey Young4, (1)University of South Florida Tampa, Tampa, FL, United States, (2)University of South Florida, Tampa, FL, United States, (3)University of South Florida Tampa, School of Geoscience, Tampa, FL, United States, (4)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (5)University of Maryland, Department of Geology, Maryland, United States
Abstract:
As a part of the TubeX project, we are developing a library of lava tube geometries and their corresponding raw and migrated ground penetrating radar (GPR) images. The GPR image library will encompass a range of lava tube geometries, including tubes of different heights, widths, geometries, and structures (e.g., pillars), plus a variety of floor textures (e.g., smooth, ropey, rubbly) and overhead thicknesses.

The library is based on a set of combined GPR profiles and LiDAR point clouds of lava tubes at Lava Beds National Monument (LBNM). The collection will include both the field acquired GPR data and synthetic data based on the LiDAR-derived tube geometries. Both the observed data and synthetic model outputs will initially be processed with standard techniques. Then we will perform novel processing and modeling techniques including 2D migration required to account for the void space of the lava tubes. This library will be used to assess the distinct influences of surface roughness, profile orientation, antenna orientation, antenna frequency, antenna spacing, tube geometry, and floor texture on the radar returns. This library will serve as an asset for determining the utility of deploying GPR technology in mapping tubes in volcanic environments in space missions.

We have designed and developed a website to store and present the data with an embedded search mechanism. The library which will be accessible to the public, designed for users with varying levels of expertise. The geo-tagged data will be presented on aerial maps enabling visualization of the GPR transects’ locations relative to the Lava Bed National Monument caves, with easy access to their data/images. All data, images, and videos will be downloadable.

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