Computer Science – Sound
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgre..11106s21n&link_type=abstract
Journal of Geophysical Research, Volume 111, Issue E6, CiteID E06S21
Computer Science
Sound
18
Planetary Sciences: Solar System Objects: Mars, Planetary Sciences: Solid Surface Planets: Polar Regions, Planetary Sciences: Solid Surface Planets: Remote Sensing, Physical Properties Of Rocks: Instruments And Techniques, Radio Science: Radio Wave Propagation
Scientific paper
Determining the three-dimensional (3-D) structure of the Martian polar caps is fundamental to understanding their hydrologic history, dynamic behavior, past climatic changes, and the underlying lithosphere, and radar sounding is the most promising technique to do so. We model the dielectric profile of the Martian polar layered deposits (PLD), apply it to a 1-D electromagnetic plane wave propagation model, and calculate the relative strength of radar reflections produced by layering within these deposits. Variations in dust fraction with depth derive from albedo profiles of a northern polar trough and a radiative transfer model. Detection of the fine-scale layering present in the polar deposits with SHARAD is likely under a wide range of possible dielectric properties of the ice and silicate inclusions as long as minimum inclusion volumetric fractions are larger than 10-3. Our models indicate also that stratigraphic mapping of the PLD is feasible with a vertical resolution of ~20 m under ideal conditions. Penetration depths depend greatly on the dielectric properties of silicate inclusions, reaching at least 250 m for ice rich in highly conductive altered basaltic dust to at least 2 km for weakly conducting silicate inclusions. Because of the wide parameter space and unconstrained composition, interpretation of polar radar data will be best accomplished in conjunction with updated thermal models and other data sets, such as the recently published results from orbital infrared remote sensing that impose limits on ice grain size and dust.
Nunes Daniel Cahn
Phillips Roger J.
No associations
LandOfFree
Radar subsurface mapping of the polar layered deposits on Mars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Radar subsurface mapping of the polar layered deposits on Mars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radar subsurface mapping of the polar layered deposits on Mars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1064025