Water detection in the Martian subsurface

Essam Heggy, P. Paillou, F. Demontoux, G. Ruffié, G. Grandjean

Research output: Contribution to journalArticle

Abstract

Performances of low frequency sounding radars, in term of penetration depth and signal to noise ratio, are mainly function of electric and magnetic losses, volume scattering, and interface roughness. In order to evaluate experimentally the impact of each of those parameters on the future sounding radar missions foreseen for Mars exploration, we conducted series of measurements of the electromagnetic properties of volcanic and sedimentary materials that may be present in the near Martian subsurface layers. Results were used to construct some representatives geoelectrical profiles of the Martian subsurface for the 1-20 MHz frequency range. We considered in particular a simple 3-layered model, which is a primary model to describe terrains where recently observed fluvial-like features raise the possibility that liquid water may exist at shallow depths (100 to 500 meters). We used expected subsurface geophysical conditions such as temperature gradient, rock porosity that may exist for such sites (Clifford, 1993) to construct representative laboratory samples for each layer. We integrated the measured EM characteristics in a geoelectrical model including interface roughness and volume scatterers. We then used the Finite Difference Time Domain (FDTD) algorithm to simulate the radar backscattered echo and evaluate the ability of future sounders to detect the probable presence of ground ice-water interface in such a geological configuration.

Original languageEnglish
Pages (from-to)466-470
Number of pages5
JournalProceedings of SPIE-The International Society for Optical Engineering
Volume4758
DOIs
Publication statusPublished - 2002
Externally publishedYes

Fingerprint

sounding
Water
Roughness
Radar
roughness
Surface roughness
Electric losses
water
Magnetic leakage
Mars exploration
radar echoes
radar measurement
Mars
Evaluate
Finite-difference Time-domain (FDTD)
electromagnetic properties
Ice
Probable
Porosity
scattering

Keywords

  • Mars
  • Radar
  • Subsurface
  • Water

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Water detection in the Martian subsurface. / Heggy, Essam; Paillou, P.; Demontoux, F.; Ruffié, G.; Grandjean, G.

In: Proceedings of SPIE-The International Society for Optical Engineering, Vol. 4758, 2002, p. 466-470.

Research output: Contribution to journalArticle

Heggy, Essam ; Paillou, P. ; Demontoux, F. ; Ruffié, G. ; Grandjean, G. / Water detection in the Martian subsurface. In: Proceedings of SPIE-The International Society for Optical Engineering. 2002 ; Vol. 4758. pp. 466-470.
@article{cc24ad07f58b4200b5059623296e6b42,
title = "Water detection in the Martian subsurface",
abstract = "Performances of low frequency sounding radars, in term of penetration depth and signal to noise ratio, are mainly function of electric and magnetic losses, volume scattering, and interface roughness. In order to evaluate experimentally the impact of each of those parameters on the future sounding radar missions foreseen for Mars exploration, we conducted series of measurements of the electromagnetic properties of volcanic and sedimentary materials that may be present in the near Martian subsurface layers. Results were used to construct some representatives geoelectrical profiles of the Martian subsurface for the 1-20 MHz frequency range. We considered in particular a simple 3-layered model, which is a primary model to describe terrains where recently observed fluvial-like features raise the possibility that liquid water may exist at shallow depths (100 to 500 meters). We used expected subsurface geophysical conditions such as temperature gradient, rock porosity that may exist for such sites (Clifford, 1993) to construct representative laboratory samples for each layer. We integrated the measured EM characteristics in a geoelectrical model including interface roughness and volume scatterers. We then used the Finite Difference Time Domain (FDTD) algorithm to simulate the radar backscattered echo and evaluate the ability of future sounders to detect the probable presence of ground ice-water interface in such a geological configuration.",
keywords = "Mars, Radar, Subsurface, Water",
author = "Essam Heggy and P. Paillou and F. Demontoux and G. Ruffi{\'e} and G. Grandjean",
year = "2002",
doi = "10.1117/12.462293",
language = "English",
volume = "4758",
pages = "466--470",
journal = "Proceedings of SPIE - The International Society for Optical Engineering",
issn = "0277-786X",
publisher = "SPIE",

}

TY - JOUR

T1 - Water detection in the Martian subsurface

AU - Heggy, Essam

AU - Paillou, P.

AU - Demontoux, F.

AU - Ruffié, G.

AU - Grandjean, G.

PY - 2002

Y1 - 2002

N2 - Performances of low frequency sounding radars, in term of penetration depth and signal to noise ratio, are mainly function of electric and magnetic losses, volume scattering, and interface roughness. In order to evaluate experimentally the impact of each of those parameters on the future sounding radar missions foreseen for Mars exploration, we conducted series of measurements of the electromagnetic properties of volcanic and sedimentary materials that may be present in the near Martian subsurface layers. Results were used to construct some representatives geoelectrical profiles of the Martian subsurface for the 1-20 MHz frequency range. We considered in particular a simple 3-layered model, which is a primary model to describe terrains where recently observed fluvial-like features raise the possibility that liquid water may exist at shallow depths (100 to 500 meters). We used expected subsurface geophysical conditions such as temperature gradient, rock porosity that may exist for such sites (Clifford, 1993) to construct representative laboratory samples for each layer. We integrated the measured EM characteristics in a geoelectrical model including interface roughness and volume scatterers. We then used the Finite Difference Time Domain (FDTD) algorithm to simulate the radar backscattered echo and evaluate the ability of future sounders to detect the probable presence of ground ice-water interface in such a geological configuration.

AB - Performances of low frequency sounding radars, in term of penetration depth and signal to noise ratio, are mainly function of electric and magnetic losses, volume scattering, and interface roughness. In order to evaluate experimentally the impact of each of those parameters on the future sounding radar missions foreseen for Mars exploration, we conducted series of measurements of the electromagnetic properties of volcanic and sedimentary materials that may be present in the near Martian subsurface layers. Results were used to construct some representatives geoelectrical profiles of the Martian subsurface for the 1-20 MHz frequency range. We considered in particular a simple 3-layered model, which is a primary model to describe terrains where recently observed fluvial-like features raise the possibility that liquid water may exist at shallow depths (100 to 500 meters). We used expected subsurface geophysical conditions such as temperature gradient, rock porosity that may exist for such sites (Clifford, 1993) to construct representative laboratory samples for each layer. We integrated the measured EM characteristics in a geoelectrical model including interface roughness and volume scatterers. We then used the Finite Difference Time Domain (FDTD) algorithm to simulate the radar backscattered echo and evaluate the ability of future sounders to detect the probable presence of ground ice-water interface in such a geological configuration.

KW - Mars

KW - Radar

KW - Subsurface

KW - Water

UR - http://www.scopus.com/inward/record.url?scp=0036058475&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036058475&partnerID=8YFLogxK

U2 - 10.1117/12.462293

DO - 10.1117/12.462293

M3 - Article

VL - 4758

SP - 466

EP - 470

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

SN - 0277-786X

ER -