SHARAD Illuminates Deeper Martian Subsurface Structures with a Boost from Very Large Rolls of the MRO Spacecraft Article Swipe
N. E. Putzig
,
G. A. Morgan
,
M. R. Perry
,
B. A. Campbell
,
J. L. Whitten
,
Fabrizio Bernardini
,
Alessandro DiCarlofelice
,
Piero Tognolatti
,
P. Lombardo
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.3847/psj/addbe1
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.3847/psj/addbe1
Throughout its mission, the Mars Reconnaissance Orbiter (MRO) has often rolled about its along-track axis by up to 28° to partially compensate for the suboptimal location of the Shallow Radar (SHARAD) antenna along an edge of the spacecraft that is opposite the imaging payload deck, thereby enhancing the signal-to-noise ratio (S/N) of echoes returned from the surface. After recent modeling work predicted that a much larger roll would improve the S/N by ~10 dB relative to nadir-pointed observing, MRO began a limited series of 120° roll maneuvers to test the effects on radar sounding. Three such SHARAD very-large-roll (VLR) observations were acquired between 2023 May and 2024 September, and they show dramatic improvements in signal clarity and depth of penetration, with S/N increasing by 9, 11, and 14 dB over that of nearly coincident observations at 0° roll angle. In low dielectric terrains, the first and second VLR observations enabled basal detections at depths previously unachievable, reaching depths of 800 m in Medusae Fossae materials and 1500 m through the ice of Ultimi Scopuli, respectively. The second VLR observation also obtained enhanced reflections throughout the ice stack. In the higher dielectric terrain of Amazonis Planitia, the third VLR observation improved continuity of a dipping subsurface interface, but it revealed neither an extension of the interface to greater depths nor any deeper interfaces. The MRO mission intends to obtain more SHARAD VLR observations of polar terrains and of midlatitude glacial and ground ices, sediments, and volcanics.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3847/psj/addbe1
- OA Status
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All OpenAlex metadata
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https://openalex.org/W4411220425Canonical identifier for this work in OpenAlex
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https://doi.org/10.3847/psj/addbe1Digital Object Identifier
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SHARAD Illuminates Deeper Martian Subsurface Structures with a Boost from Very Large Rolls of the MRO SpacecraftWork title
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articleOpenAlex work type
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enPrimary language
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2025Year of publication
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2025-06-01Full publication date if available
- Authors
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N. E. Putzig, G. A. Morgan, M. R. Perry, B. A. Campbell, J. L. Whitten, Fabrizio Bernardini, Alessandro DiCarlofelice, Piero Tognolatti, P. LombardoList of authors in order
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https://doi.org/10.3847/psj/addbe1Publisher landing page
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YesWhether a free full text is available
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goldOpen access status per OpenAlex
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https://doi.org/10.3847/psj/addbe1Direct OA link when available
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Martian, Spacecraft, Astrobiology, Aerospace engineering, Mars Exploration Program, Geology, Environmental science, Engineering, PhysicsTop concepts (fields/topics) attached by OpenAlex
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1Total citation count in OpenAlex
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2025: 1Per-year citation counts (last 5 years)
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| abstract_inverted_index.1500 | 167 |
| abstract_inverted_index.2023 | 104 |
| abstract_inverted_index.2024 | 107 |
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| abstract_inverted_index.(S/N) | 51 |
| abstract_inverted_index.(VLR) | 99 |
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| abstract_inverted_index.Fossae | 164 |
| abstract_inverted_index.SHARAD | 97, 230 |
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| abstract_inverted_index.depths | 154, 158, 218 |
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| abstract_inverted_index.signal | 115 |
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| abstract_inverted_index.clarity | 116 |
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| abstract_inverted_index.glacial | 239 |
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| abstract_inverted_index.terrain | 192 |
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| abstract_inverted_index.dramatic | 112 |
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| abstract_inverted_index.Planitia, | 195 |
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| abstract_inverted_index.maneuvers | 87 |
| abstract_inverted_index.materials | 165 |
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| abstract_inverted_index.unachievable, | 156 |
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| abstract_inverted_index.very-large-roll | 98 |
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| institutions_distinct_count | 9 |
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| citation_normalized_percentile.is_in_top_10_percent | True |