No evidence for thick deposits of ice at the lunar south pole

@article{Campbell2006NoEF,
  title={No evidence for thick deposits of ice at the lunar south pole},
  author={Donald B. Campbell and Bruce A. Campbell and Lynn M. Carter and Jean-Luc Margot and Nick J. S. Stacy},
  journal={Nature},
  year={2006},
  volume={443},
  pages={835-837}
}
Shackleton crater at the Moon’s south pole has been suggested as a possible site of concentrated deposits of water ice, on the basis of modelling of bi-static radar polarization properties and interpretations of earlier Earth-based radar images. This suggestion, and parallel assumptions about other topographic cold traps, is a significant element in planning for future lunar landings. Hydrogen enhancements have been identified in the polar regions, but these data do not identify the host… Expand
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TLDR
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[1] The Mini-RF radar instrument on the Lunar Reconnaissance Orbiter spacecraft mapped both lunar poles in two different RF wavelengths (complete mapping at 12.6 cm S-band and partial mapping at 4.2Expand
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[1] We present new polarimetric radar data for the surface of the north pole of the Moon acquired with the Mini-SAR experiment onboard India's Chandrayaan-1 spacecraft. Between mid-February andExpand
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References

SHOWING 1-10 OF 33 REFERENCES
Arecibo Radar Mapping of the Lunar Poles: A Search for Ice Deposits
The Arecibo 12.6-centimeter wavelength radar system was used to image the polar regions of the moon at a resolution of 125 meters in a search for ice deposits in areas of possible permanent shadowExpand
Evidence for water ice near the lunar poles
Improved versions of Lunar Prospector thermal and epithermal neutron data were studied to help discriminate between potential delivery and retention mechanisms for hydrogen on the Moon. ImprovedExpand
Regolith properties in the south polar region of the Moon from 70-cm radar polarimetry
Abstract The south polar region of the Moon contains areas permanently shadowed from solar illumination, which may provide cold traps for volatiles such as water ice. Previous radar studies haveExpand
Integration of lunar polar remote‐sensing data sets: Evidence for ice at the lunar south pole
In order to investigate the feasibility of ice deposits at the lunar south pole, we have integrated all relevant lunar polar data sets. These include illumination data, Arecibo ground-basedExpand
High-Resolution Radar Imaging of Mercury's North Pole
Abstract The recently upgraded Arecibo S-band (λ12.6-cm) radar was used to make delay-Doppler images of Mercury's north polar region, where earlier observations had shown strong echoes from putativeExpand
Radar mapping of lunar cryptomaria east of Orientale basin
[1] Lunar cryptomare deposits represent early basaltic volcanic material that has been mantled by or incorporated into highland-rich ejecta from basin- or crater-forming impacts. Mapping these buriedExpand
Topography of the lunar poles from radar interferometry: a survey of cold trap locations.
TLDR
Detailed topographic maps of the lunar poles have been obtained by Earth-based radar interferometry with the 3.5-centimeter wavelength Goldstone Solar System Radar using digital elevation models to locate regions that are in permanent shadow from solar illumination and may harbor ice deposits. Expand
Mercury Radar Imaging: Evidence for Polar Ice
The first unambiguous full-disk radar mapping of Mercury at 3.5-centimeter wavelength, with the Goldstone 70-meter antenna transmitting and 26 antennas of the Very Large Array receiving, has providedExpand
Ice in the lunar polar regions
The idea that ice and other trapped volatiles exist in permanently shadowed regions near the lunar poles was proposed by Watson, Murray, and Brown [1961]. It is reexamined in the present paper, inExpand
Radar Mapping of Mercury: Full-Disk Images and Polar Anomalies
TLDR
A random-code technique used at Arecibo to obtain delay-Doppler radar images of the full disk of Mercury revealed anomalously bright features at the north and south poles and a variety of more subdued reflectivity features ranging in size from hundreds to thousands of kilometers. Expand
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