The JPL lunar gravity field to spherical harmonic degree 660 from the GRAIL Primary Mission
The lunar gravity field and topography provide a way to probe the interior structure of the Moon. Prior to the Gravity Recovery and Interior Laboratory (GRAIL) mission, knowledge of the lunar gravity was limited mostly to the nearside of the Moon, since the farside was not directly observable from m...
| Κύριοι συγγραφείς: | , , , , , , , , , , , , |
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| Άλλοι συγγραφείς: | |
| Μορφή: | Άρθρο |
| Γλώσσα: | en_US |
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American Geophysical Union
2014
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| Διαθέσιμο Online: | http://hdl.handle.net/1721.1/85858 https://orcid.org/0000-0003-2652-8017 |
| _version_ | 1826189165691142144 |
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| author | Konopliv, Alex S. Park, Ryan S. Yuan, Dah-Ning Asmar, Sami W. Watkins, Michael M. Williams, James G. Fahnestock, Eugene Kruizinga, Gerhard Paik, Meegyeong Strekalov, Dmitry Harvey, Nate Smith, David Edmund Zuber, Maria |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Konopliv, Alex S. Park, Ryan S. Yuan, Dah-Ning Asmar, Sami W. Watkins, Michael M. Williams, James G. Fahnestock, Eugene Kruizinga, Gerhard Paik, Meegyeong Strekalov, Dmitry Harvey, Nate Smith, David Edmund Zuber, Maria |
| author_sort | Konopliv, Alex S. |
| collection | MIT |
| description | The lunar gravity field and topography provide a way to probe the interior structure of the Moon. Prior to the Gravity Recovery and Interior Laboratory (GRAIL) mission, knowledge of the lunar gravity was limited mostly to the nearside of the Moon, since the farside was not directly observable from missions such as Lunar Prospector. The farside gravity was directly observed for the first time with the SELENE mission, but was limited to spherical harmonic degree n ≤ 70. The GRAIL Primary Mission, for which results are presented here, dramatically improves the gravity spectrum by up to ~4 orders of magnitude for the entire Moon and for more than 5 orders-of-magnitude over some spectral ranges by using interspacecraft measurements with near 0.03 μm/s accuracy. The resulting GL0660B (n = 660) solution has 98% global coherence with topography to n = 330, and has variable regional surface resolution between n = 371 (14.6 km) and n = 583 (9.3 km) because the gravity data were collected at different spacecraft altitudes. The GRAIL data also improve low-degree harmonics, and the uncertainty in the lunar Love number has been reduced by ~5× to k2 = 0.02405 ± 0.00018. The reprocessing of the Lunar Prospector data indicates ~3× improved orbit uncertainty for the lower altitudes to ~10 m, whereas the GRAIL orbits are determined to an accuracy of 20 cm. |
| first_indexed | 2024-09-23T08:10:34Z |
| format | Article |
| id | mit-1721.1/85858 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:10:34Z |
| publishDate | 2014 |
| publisher | American Geophysical Union |
| record_format | dspace |
| spelling | mit-1721.1/858582022-09-30T08:04:50Z The JPL lunar gravity field to spherical harmonic degree 660 from the GRAIL Primary Mission Konopliv, Alex S. Park, Ryan S. Yuan, Dah-Ning Asmar, Sami W. Watkins, Michael M. Williams, James G. Fahnestock, Eugene Kruizinga, Gerhard Paik, Meegyeong Strekalov, Dmitry Harvey, Nate Smith, David Edmund Zuber, Maria Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Smith, David Edmund Zuber, Maria The lunar gravity field and topography provide a way to probe the interior structure of the Moon. Prior to the Gravity Recovery and Interior Laboratory (GRAIL) mission, knowledge of the lunar gravity was limited mostly to the nearside of the Moon, since the farside was not directly observable from missions such as Lunar Prospector. The farside gravity was directly observed for the first time with the SELENE mission, but was limited to spherical harmonic degree n ≤ 70. The GRAIL Primary Mission, for which results are presented here, dramatically improves the gravity spectrum by up to ~4 orders of magnitude for the entire Moon and for more than 5 orders-of-magnitude over some spectral ranges by using interspacecraft measurements with near 0.03 μm/s accuracy. The resulting GL0660B (n = 660) solution has 98% global coherence with topography to n = 330, and has variable regional surface resolution between n = 371 (14.6 km) and n = 583 (9.3 km) because the gravity data were collected at different spacecraft altitudes. The GRAIL data also improve low-degree harmonics, and the uncertainty in the lunar Love number has been reduced by ~5× to k2 = 0.02405 ± 0.00018. The reprocessing of the Lunar Prospector data indicates ~3× improved orbit uncertainty for the lower altitudes to ~10 m, whereas the GRAIL orbits are determined to an accuracy of 20 cm. United States. National Aeronautics and Space Administration 2014-03-20T20:39:48Z 2014-03-20T20:39:48Z 2013-07 2013-05 Article http://purl.org/eprint/type/JournalArticle 21699097 http://hdl.handle.net/1721.1/85858 Konopliv, Alex S., Ryan S. Park, Dah-Ning Yuan, Sami W. Asmar, Michael M. Watkins, James G. Williams, Eugene Fahnestock, et al. “The JPL Lunar Gravity Field to Spherical Harmonic Degree 660 from the GRAIL Primary Mission.” Journal of Geophysical Research: Planets 118, no. 7 (July 2013): 1415–1434. https://orcid.org/0000-0003-2652-8017 en_US http://dx.doi.org/10.1002/jgre.20097 Journal of Geophysical Research: Planets Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Geophysical Union MIT web domain |
| spellingShingle | Konopliv, Alex S. Park, Ryan S. Yuan, Dah-Ning Asmar, Sami W. Watkins, Michael M. Williams, James G. Fahnestock, Eugene Kruizinga, Gerhard Paik, Meegyeong Strekalov, Dmitry Harvey, Nate Smith, David Edmund Zuber, Maria The JPL lunar gravity field to spherical harmonic degree 660 from the GRAIL Primary Mission |
| title | The JPL lunar gravity field to spherical harmonic degree 660 from the GRAIL Primary Mission |
| title_full | The JPL lunar gravity field to spherical harmonic degree 660 from the GRAIL Primary Mission |
| title_fullStr | The JPL lunar gravity field to spherical harmonic degree 660 from the GRAIL Primary Mission |
| title_full_unstemmed | The JPL lunar gravity field to spherical harmonic degree 660 from the GRAIL Primary Mission |
| title_short | The JPL lunar gravity field to spherical harmonic degree 660 from the GRAIL Primary Mission |
| title_sort | jpl lunar gravity field to spherical harmonic degree 660 from the grail primary mission |
| url | http://hdl.handle.net/1721.1/85858 https://orcid.org/0000-0003-2652-8017 |
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