An upper limit for ice in Shackleton crater as revealed by LRO Mini-RF orbital
[1] Although diverse measurements have indicated H + , OH À , or H 2 O species in the lunar polar regions, pinpointing its location, form, and abundance in specific reservoirs has proven elusive. Here we report on the first orbital radar measurements of Shackleton crater near the lunar south pole. M...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1046.6448 2023-05-15T18:22:21+02:00 An upper limit for ice in Shackleton crater as revealed by LRO Mini-RF orbital B J Thomson D B J Bussey C D Neish J T S Cahill E Heggy R L Kirk G W Patterson R K Raney P D Spudis T W Thompson E A Ustinov The Pennsylvania State University CiteSeerX Archives 2012 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1046.6448 http://www.spudislunarresources.com/Bibliography/p/106.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1046.6448 http://www.spudislunarresources.com/Bibliography/p/106.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.spudislunarresources.com/Bibliography/p/106.pdf text 2012 ftciteseerx 2020-04-05T00:19:55Z [1] Although diverse measurements have indicated H + , OH À , or H 2 O species in the lunar polar regions, pinpointing its location, form, and abundance in specific reservoirs has proven elusive. Here we report on the first orbital radar measurements of Shackleton crater near the lunar south pole. Mini-RF observations indicate a patchy, heterogeneous enhancement in CPR (circular polarization ratio) on the crater walls whose strength decreases with depth toward the crater floor, a result that is most consistent with a roughness effect due to less mature regolith present on the crater wall slopes. However, the results do not rule out a modest ice contribution, and an upper limit of $5-10 wt% H 2 O ice (up to 30 vol.%) present in the uppermost meter of regolith is also consistent with the observations. Text South pole Unknown Shackleton South Pole |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
[1] Although diverse measurements have indicated H + , OH À , or H 2 O species in the lunar polar regions, pinpointing its location, form, and abundance in specific reservoirs has proven elusive. Here we report on the first orbital radar measurements of Shackleton crater near the lunar south pole. Mini-RF observations indicate a patchy, heterogeneous enhancement in CPR (circular polarization ratio) on the crater walls whose strength decreases with depth toward the crater floor, a result that is most consistent with a roughness effect due to less mature regolith present on the crater wall slopes. However, the results do not rule out a modest ice contribution, and an upper limit of $5-10 wt% H 2 O ice (up to 30 vol.%) present in the uppermost meter of regolith is also consistent with the observations. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
B J Thomson D B J Bussey C D Neish J T S Cahill E Heggy R L Kirk G W Patterson R K Raney P D Spudis T W Thompson E A Ustinov |
spellingShingle |
B J Thomson D B J Bussey C D Neish J T S Cahill E Heggy R L Kirk G W Patterson R K Raney P D Spudis T W Thompson E A Ustinov An upper limit for ice in Shackleton crater as revealed by LRO Mini-RF orbital |
author_facet |
B J Thomson D B J Bussey C D Neish J T S Cahill E Heggy R L Kirk G W Patterson R K Raney P D Spudis T W Thompson E A Ustinov |
author_sort |
B J Thomson |
title |
An upper limit for ice in Shackleton crater as revealed by LRO Mini-RF orbital |
title_short |
An upper limit for ice in Shackleton crater as revealed by LRO Mini-RF orbital |
title_full |
An upper limit for ice in Shackleton crater as revealed by LRO Mini-RF orbital |
title_fullStr |
An upper limit for ice in Shackleton crater as revealed by LRO Mini-RF orbital |
title_full_unstemmed |
An upper limit for ice in Shackleton crater as revealed by LRO Mini-RF orbital |
title_sort |
upper limit for ice in shackleton crater as revealed by lro mini-rf orbital |
publishDate |
2012 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1046.6448 http://www.spudislunarresources.com/Bibliography/p/106.pdf |
geographic |
Shackleton South Pole |
geographic_facet |
Shackleton South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
http://www.spudislunarresources.com/Bibliography/p/106.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1046.6448 http://www.spudislunarresources.com/Bibliography/p/106.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766201746002018304 |