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Heffels, Alexandra and Knapmeyer, Martin and Oberst, Jürgen and Haase, I. (2017) Re-evaluation of Apollo 17 Lunar Seismic Profiling Experiment data. Planetary and Space Science, 135, pp. 43-54. Elsevier. doi: 10.1016/j.pss.2016.11.007. ISSN 0032-0633.
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Official URL: http://dx.doi.org/10.1016/j.pss.2016.11.007
Abstract
We re-analyzed Apollo 17 Lunar Seismic Profiling Experiment (LSPE) data to improve our knowledge of the subsurface structure of this landing site. We use new geometrically accurate 3-D positions of the seismic equipment deployed by the astronauts, which were previously derived using high-resolution images by Lunar Reconnaissance Orbiter (LRO) in combination with Apollo astronaut photography. These include coordinates of six Explosive Packages (EPs) and four geophone stations. Re-identified P-wave arrival times are used to calculate two- and three-layer seismic velocity models. A strong increase of seismic velocity with depth can be confirmed, in particular, we suggest a more drastic increase than previously thought. For the three-layer model the P-wave velocities were calculated to 285, 580, and 1825 m/s for the uppermost, second, and third layer, respectively, with the boundaries between the layers being at 96 and 773 m depth. When compared with results obtained with previously published coordinates, we find (1) a slightly higher velocity (+4%) for the uppermost layer, and (2) lower P-wave velocities for the second and third layers, representing a decrease of 34% and 12% for second and third layer, respectively. Using P-wave arrival time readings of previous studies, we confirm that velocities increase when changing over from old to new coordinates. In the three-layer case, this means using new coordinates alone leads to thinned layers, velocities rise slightly for the uppermost layer and decrease significantly for the layers below.
| Item URL in elib: | https://elib.dlr.de/109959/ | ||||||||||||||||||||
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| Document Type: | Article | ||||||||||||||||||||
| Title: | Re-evaluation of Apollo 17 Lunar Seismic Profiling Experiment data | ||||||||||||||||||||
| Authors: |
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| Date: | 2017 | ||||||||||||||||||||
| Journal or Publication Title: | Planetary and Space Science | ||||||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||||||
| Open Access: | Yes | ||||||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||||||||||
| Volume: | 135 | ||||||||||||||||||||
| DOI: | 10.1016/j.pss.2016.11.007 | ||||||||||||||||||||
| Page Range: | pp. 43-54 | ||||||||||||||||||||
| Publisher: | Elsevier | ||||||||||||||||||||
| ISSN: | 0032-0633 | ||||||||||||||||||||
| Status: | Published | ||||||||||||||||||||
| Keywords: | Apollo 17, LSPE, Lunar Seismic Profiling Instrument, Moons, subsurface | ||||||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||
| HGF - Program: | Space | ||||||||||||||||||||
| HGF - Program Themes: | Space Exploration | ||||||||||||||||||||
| DLR - Research area: | Raumfahrt | ||||||||||||||||||||
| DLR - Program: | R EW - Space Exploration | ||||||||||||||||||||
| DLR - Research theme (Project): | R - Exploration of the Solar System | ||||||||||||||||||||
| Location: | Berlin-Adlershof | ||||||||||||||||||||
| Institutes and Institutions: | Institute of Planetary Research > Planetary Physics Institute of Planetary Research > Planetary Geodesy | ||||||||||||||||||||
| Deposited By: | Heffels, Alexandra | ||||||||||||||||||||
| Deposited On: | 22 Dec 2016 09:53 | ||||||||||||||||||||
| Last Modified: | 27 Nov 2023 11:57 |
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