Radar determination of Mars surface properties
Radar studies of Mars have provided measurements of surface texture on scales of centimeters to hundreds of meters and measurements of surface material properties. Texture (rms surface tilts and estimates of small-scale roughness) may be inferred from dispersion and/or polarization of the radar echo...
Main Authors: | , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
1992
|
Subjects: | |
Online Access: | http://ntrs.nasa.gov/search.jsp?R=19930043875 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:19930043875 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:19930043875 2023-05-15T16:38:15+02:00 Radar determination of Mars surface properties Simpson, Richard A. Harmon, John K. Zisk, Stanley H. Thompson, T. W. Muhleman, Duane O. Unclassified, Unlimited, Publicly available 1992 http://ntrs.nasa.gov/search.jsp?R=19930043875 unknown http://ntrs.nasa.gov/search.jsp?R=19930043875 Accession ID: 93A27872 Copyright Other Sources 91 In: Mars (A93-27852 09-91); p. 652-685. 1992 ftnasantrs 2012-02-15T20:04:04Z Radar studies of Mars have provided measurements of surface texture on scales of centimeters to hundreds of meters and measurements of surface material properties. Texture (rms surface tilts and estimates of small-scale roughness) may be inferred from dispersion and/or polarization of the radar echo; material properties (reflectivity of dielectric constant) are derived from echo strength. Mars is a diverse target; depending on location, rms surface tilts have been found to vary over the range 0.25 to 10 deg while reflectivity covers at least 3 to 13 percent. Plains units are the most variable, having both the smoothest and roughest surfaces, cratered terrain can be considered predictable and 'average' by comparison. Recent data identify scattering by small structures (perhaps rocks on or near the surface) as playing a more important role than previously recognized. Scattering by the residual ice cap near Mars' south pole is particularly unusual. The present state of radar surface studies is summarized. Other/Unknown Material Ice cap South pole NASA Technical Reports Server (NTRS) South Pole |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
91 |
spellingShingle |
91 Simpson, Richard A. Harmon, John K. Zisk, Stanley H. Thompson, T. W. Muhleman, Duane O. Radar determination of Mars surface properties |
topic_facet |
91 |
description |
Radar studies of Mars have provided measurements of surface texture on scales of centimeters to hundreds of meters and measurements of surface material properties. Texture (rms surface tilts and estimates of small-scale roughness) may be inferred from dispersion and/or polarization of the radar echo; material properties (reflectivity of dielectric constant) are derived from echo strength. Mars is a diverse target; depending on location, rms surface tilts have been found to vary over the range 0.25 to 10 deg while reflectivity covers at least 3 to 13 percent. Plains units are the most variable, having both the smoothest and roughest surfaces, cratered terrain can be considered predictable and 'average' by comparison. Recent data identify scattering by small structures (perhaps rocks on or near the surface) as playing a more important role than previously recognized. Scattering by the residual ice cap near Mars' south pole is particularly unusual. The present state of radar surface studies is summarized. |
format |
Other/Unknown Material |
author |
Simpson, Richard A. Harmon, John K. Zisk, Stanley H. Thompson, T. W. Muhleman, Duane O. |
author_facet |
Simpson, Richard A. Harmon, John K. Zisk, Stanley H. Thompson, T. W. Muhleman, Duane O. |
author_sort |
Simpson, Richard A. |
title |
Radar determination of Mars surface properties |
title_short |
Radar determination of Mars surface properties |
title_full |
Radar determination of Mars surface properties |
title_fullStr |
Radar determination of Mars surface properties |
title_full_unstemmed |
Radar determination of Mars surface properties |
title_sort |
radar determination of mars surface properties |
publishDate |
1992 |
url |
http://ntrs.nasa.gov/search.jsp?R=19930043875 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
Ice cap South pole |
genre_facet |
Ice cap South pole |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19930043875 Accession ID: 93A27872 |
op_rights |
Copyright |
_version_ |
1766028525155909632 |