A surface gravity traverse on Mars indicates low bedrock density at Gale crater

@article{Lewis2019ASG,
  title={A surface gravity traverse on Mars indicates low bedrock density at Gale crater},
  author={Kevin W. Lewis and Stephen Peters and Kurt Gonter and Shaunna M. Morrison and Nicholas Charles Schmerr and Ashwin R. Vasavada and Travis S. J. Gabriel},
  journal={Science},
  year={2019},
  volume={363},
  pages={535 - 537}
}
Teaching Curiosity to do gravimetry Gravimetry—the measurement of tiny changes in gravitational fields—can be used to weigh mountains. Large-scale gravimetric mapping can be done from orbit, but examining small details requires a vehicle on the ground. The Curiosity rover on Mars carries several accelerometers used for routine navigation. Lewis et al. recalibrated these accelerometers to allow them to be used for gravimetry. They measured how the local gravitational field changed as the rover… 

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References

SHOWING 1-10 OF 49 REFERENCES

Gravity Field of the Moon from the Gravity Recovery and Interior Laboratory (GRAIL) Mission

The Moon's gravity field reveals that impacts have homogenized the density of the crust and fractured it extensively, and GRAIL elucidates the role of impact bombardment in homogenizing the distribution of shallow density anomalies on terrestrial planetary bodies.

Subsurface density structure of Taurus‐Littrow Valley using Apollo 17 gravity data

The Traverse Gravimeter Experiment (TGE) from the Apollo 17 mission was the first and only successful gravity survey on the surface of the Moon, revealing the local gravity field at Taurus‐Littrow

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.

Redox stratification of an ancient lake in Gale crater, Mars

The results will aid the understanding of where and when Mars was once habitable and constrain the chemical environment within the lake in Gale crater, as well as short- and long-term climate variations in and around Gale crater.

Growth and form of the mound in Gale Crater, Mars: Slope wind enhanced erosion and transport

Ancient sediments provide archives of climate and habitability on Mars. Gale Crater, the landing site for the Mars Science Laboratory (MSL), hosts a 5-km-high sedimentary mound (Mount Sharp/Aeolis

Modeling the thermal and physical evolution of Mount Sharp's sedimentary rocks, Gale Crater, Mars: Implications for diagenesis on the MSL Curiosity rover traverse

Gale Crater, the Mars Science Laboratory (MSL) landing site, contains a central mound, named Aeolis Mons (informally Mount Sharp) that preserves 5 km of sedimentary stratigraphy. Formation scenarios

Measurement of the Earth tides with a MEMS gravimeter

A microelectromechanical system (MEMS) device with a sensitivity of 40 microgal per hertz1/2 only a few cubic centimetres in size is presented, used to measure the Earth tides, revealing the long-term stability of the instrument compared to any other MEMS device.

A hematite-bearing layer in Gale Crater, Mars: Mapping and implications for past aqueous conditions

Oversampled Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) visible and near-infrared hyperspectral data over Mount Sharp in Gale Crater, Mars, were used to generate spatially sharpened