Christopher Gerekos

Christopher Gerekos
University of Texas at Austin | UT · Institute for Geophysics

Doctor of Engineering

About

13
Publications
1,492
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69
Citations
Introduction
M.Sc. in Physics, PhD. in ICT. Working on planetary radar sounder technology, computational electromagnetics, surface and subsurface scattering.

Publications

Publications (13)
Article
Lava tubes are buried channels that transport thermally insulated lava. Nowadays, lava tubes on the Moon are believed to be empty and thus indicated as potential habitats for humankind. In recent years, several studies investigated possible lava tube locations, considering the gravity anomaly distribution and surficial volcanic features. This artic...
Article
Understanding the implications of Europa's roughness on backscattered radar signals is central to ensure that the future radar sounding instruments heading for the Jovian icy moons, the Radar for Icy Moons Exploration (RIME) and the Radar for Europa Assessment and Sounding: Ocean to Near-surface (REASON), will yield fruitful observations over their...
Conference Paper
Full-text available
We present an approach aimed at comprehensively simulating passive and active radar acquisitions from orbit in the noisy radio environment of the Jovian system. By comparing how a given representative target area on the icy moons appears in both cases, we expect to be able to extract valuable informations with regard both to the feasibility and val...
Article
The possibility to apply passive radar sounding techniques to the Jovian icy moons, making use of Jupiter's strong decametric emissions (DAM), has recently garnered large research interest. In this paper, we propose a radar sounding simulation approach being able to simulate and compare passive and active acquisitions for a given scenario. The prop...
Article
Spaceborne radar sounders are nadir-looking sensors operating in the high frequency (HF) or very high frequency (VHF) bands with subsurface sensing capabilities. Due to technological limitations, this type of sensors often deploys omnidirectional antennas. This results in undesired artifacts such as off-nadir clutter which could hinder data interpr...
Article
Full-text available
This work is aimed at showing the present capabilities and future potentialities of an imaging radar system that can be mounted onboard flexible aerial platforms, such as helicopters or small airplanes, and may operate in the UHF and VHF frequency bands as Sounder and as Synthetic Aperture Radar (SAR). More specifically, the Sounder operates at 165...
Conference Paper
Reliable electromagnetic simulators are of prime importance for the design of radar sounder instruments and for supporting the subsequent interpretation of their data. In this paper we present a coherent simulator based on the facet method that can compute radar echoes from the subsurface of a target area with an arbitrary number of geological laye...
Conference Paper
Spaceborne radar sounders are nadir-looking sensors operating in HF/VHF bands. Their relatively low frequency allows the penetration of the transmitted signals into a given sub-surface to infer its geoelectrical properties and composition by analyzing the radar echoes. These type of sensors are affected by unwanted artifacts such as off-nadir clutt...
Conference Paper
Lunar lava tubes are buried channels that contained thermally insulated lava during the volcanic period of the Moon. Nowadays , they are believed to be empty and thus, identified as potential habitats for humans. In recent years, numerous studies investigated the possible locations of these tubes by taking into account the distribution of gravity a...
Article
Reliable electromagnetic simulators are of prime importance for the design of radar sounder instruments and for supporting the subsequent analysis of their data. In this paper, we present a coherent, facet method-based simulator that can compute radar echoes from the subsurface of a target area with an arbitrary number of geological layers, thus go...
Article
Full-text available
Lunar lava tubes have attracted special interest as they would be suitable shelters for future human outposts on the Moon. Recent experimental results from optical images and gravitational anomalies have brought strong evidence of their existence, but such investigative means have very limited potential for global mapping of lava tubes. In this pap...