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Mars Orbiter Laser Altimeter: Experiment summary after the first year of global mapping of Mars
The Mars Orbiter Laser Altimeter (MOLA), an instrument on the Mars Global Surveyor spacecraft, has measured the topography, surface roughness, and 1.064-μm reflectivity of Mars and the heights ofExpand
Three‐dimensional seismic structure and physical properties of the crust and shallow mantle beneath the East Pacific Rise at 9°30'N
The seismic structure of the crust and shallow mantle beneath the East Pacific Rise near 9°3O′N is imaged by inverting P wave travel time data. Our tomographic results constrain for the first timeExpand
Ancient Geodynamics and Global-Scale Hydrology on Mars
The release of carbon dioxide and water accompanying the emplacement of Tharsis magmas may have sustained a warmer climate than at present, enabling the formation of ancient valley networks and fluvial landscape denudation in and adjacent to the large-scale trough. Expand
Internal structure and early thermal evolution of Mars from Mars Global Surveyor topography and gravity.
The strength of the lithosphere beneath the ancient southern highlands suggests that the northern hemisphere was a locus of high heat flow early in martian history and the thickness of the elastic lithosphere increases with time of loading in the northern plains and Tharsis. Expand
Seismic structure of the Iceland mantle plume
Oceanic hotspots are generally accepted to be the manifestations of plumes of hot, upwelling mantle material1,2, but the nature of such flows remains enigmatic. Iceland, for example, is one of theExpand
The Crust of the Moon as Seen by GRAIL
The Moon's gravity field shows that the lunar crust is less dense and more porous than was thought, and high-resolution gravity data obtained from the dual Gravity Recovery and Interior Laboratory (GRAIL) spacecraft show that the bulk density of the Moon's highlands crust is substantially lower than generally assumed. Expand
The global topography of Mars and implications for surface evolution.
Elevations measured by the Mars Orbiter Laser Altimeter have yielded a high-accuracy global map of the topography of Mars. Dominant features include the low northern hemisphere, the Tharsis province,Expand
Localization of gravity and topography: constraints on the tectonics and mantle dynamics of Venus
SUMMARY We develop a method for spatio-spectral localization of harmonic data on a sphere and use it to interpret recent high-resolution global estimates of the gravity and topography of Venus in theExpand
Microearthquake Characteristics of a Mid‐Ocean Ridge along‐axis high
We report results from a 3-week microearthquake survey of the segment of the Mid-Atlantic Ridge axis near 26°N. The segment is centered on an along-axis median valley bathymetric high that includesExpand
The Mars Observer laser altimeter investigation
The primary objective of the Mars Observer laser altimeter (MOLA) investigation is to determine globally the topography of Mars at a level suitable for addressing problems in geology and geophysics.Expand