Earth, Planets and Space

, Volume 60, Issue 4, pp 321–332 | Cite as

Instrumentation and observation target of the Lunar Radar Sounder (LRS) experiment on-board the SELENE spacecraft

  • Takayuki Ono
  • Atsushi Kumamoto
  • Yasushi Yamaguchi
  • Atsushi Yamaji
  • Takao Kobayashi
  • Yoshiya Kasahara
  • Hiroshi Oya
Open Access


The Lunar Radar Sounder (LRS) on-board the SELENE lunar orbiter is currently being equipped to provide the data of subsurface stratification and tectonic features in the shallow part (several km deep) of the lunar crust, by using an FM/CW radar technique in HF (∼5 MHz) frequency range. Knowledge of the subsurface structure is crucial to better understanding, not only of the geologic history of the Moon, but also of the Moon’s regional and global thermal history of the Moon and of the origin of the Earth-Moon system. In addition to the subsurface radar experiment, LRS will provide the spectrum of plasma waves and solar and planetary radio waves in a wide frequency range from 10 Hz to 30 MHz. This paper provides the basic function parameter of the LRS system based on the final function test and proposes observation targets and data analysis that will provide important information leading to a greater understanding of the tectonics and thermal history of the Moon.

Key words

Radar Sounder HF radar Moon subsurface structure tectonics thermal history planetary radio waves 


  1. Cooper, B. L., J. L. Carter, and C. A. Sapp, New evidence for graben origin of Oceanus Procellarum from lunar sounder optical imagery, J. Geophys. Res., 99(E2), 3799–3812, 1994.CrossRefGoogle Scholar
  2. Franklin, C. A. and M. A. MacLean, The design of swept-frequency top-side sounders, Proc. IEEE, 57, 897–929, 1969.CrossRefGoogle Scholar
  3. Gurnett, D. A., D. L. Kirchner, R. L. Huff, D. D. Morgan, A. M. Persoon, T. F. Averkamp, F. Duru, E. Nielsen, A. Safaeinili, J. J. Plaut, and G. Picardi, Radar Soundings of the Ionosphere of Mars, Science, 310, Doi:10.1126/science.1121868, 1929–1933, 2005.CrossRefGoogle Scholar
  4. Jackson, J. E. and E. S. Warren, Objectives, History, and Principal achievements of the topside sounder and ISIS project, Proc. IEEE, 57, 861–865, 1969.CrossRefGoogle Scholar
  5. Jolliff, B. L., J. J. Gills, A. Haskin, R. L. Korotev, and M. A. Wieczorek, Major lunar crustal terranes: Surface expressions and crust-mantle origins, J. Geophys. Res., 105(E2), 4197–4216, 2000.CrossRefGoogle Scholar
  6. Kasahara, Y., Y. Goto, K. Hashimoto, T. Imachi, A. Kumamoto, T. Ono, and H. Matsumoto, Plasma wave observation using waveform capture in the Lunar Radar Sounder on board the SELENE spacecraft, Earth Planets Space, 60, this issue, 341–351, 2008.CrossRefGoogle Scholar
  7. Kobayashi, T. and T. Ono, Estimation of planetary surface roughness using radio sounder A-scope data, J. Geophys. Res., 111, E06S10, doi:10.1029/2005JE002575, 2006.Google Scholar
  8. Kobayashi, T. and T. Ono, SAR/InSAR observation by an HF sounder, J. Geophys. Res., 112, E03S90, doi:10.1029/2005JE002576, 2007.Google Scholar
  9. Kobayashi, T., H. Oya, and T. Ono, A-scope analysis of subsurface radar sounding of lunar mare region, Earth Planets Space, 54, 973–982, 2002a.CrossRefGoogle Scholar
  10. Kobayashi, T., H. Oya, and T. Ono, B-scan analysis of subsurface radar sounding of lunar highland region, Earth Planets Space, 54, 983–991, 2002b.CrossRefGoogle Scholar
  11. Kumamoto, A., T. Ono, Y. Kasahara, Y. Goto, Y. Iijima, and S. Nakazawa, Electromagnetic compatibility (EMC) evaluation of the SELENE spacecraft for the lunar radar sounder (LRS) observations, Earth Planets Space, 60, this issue, 333–340, 2008.CrossRefGoogle Scholar
  12. Olhoeft, G. R. and D. W. Strangway, Dielectric properties of the first 100 meters of the moon, Earth Planet. Sci. Lett., 24, 394–404, 1975.CrossRefGoogle Scholar
  13. Ono, T., Topside Sounder Observations on-board the Japanese Scientific Satellites, IRI News, 12, 7–11, 2005.Google Scholar
  14. Ono, T. and H. Oya, Lunar Radar Sounder (LRS) experiment on-board the SELENE spacecraft, Earth Planets Space, 52, 629–637, 2000.CrossRefGoogle Scholar
  15. Ono, T., H. Oya, A. Morioka, A. Kumamoto, K. Kobayashi, T. Obara, and T. Nakagawa, Plasma waves and sounder (PWS) experiment on-board the PLANET-B Mars orbiter, Earth Planets Space, 50, 213–222, 1998.CrossRefGoogle Scholar
  16. Oya, H. and T. Ono, A new altimeter for Mars land shape observations utilizing the ionospheric sounder system on-board the Planet-B spacecraft, Earth Planets Space, 50, 229–234, 1998.CrossRefGoogle Scholar
  17. Peeples, W. J., W. R. Sill, W. M. Thomas, S. H. Ward, R. J. Phillips, R. L. Jordan, E. A. Abbott, and T. J. Killpack, Orbital radar evidence for lunar subsurface layering in Maria Serenitatis and Crisium, J. Geophys. Res., 83(B7), 3459–3468, 1978.CrossRefGoogle Scholar
  18. Phillips, R. J., G. F. Adams, W. E. Brown Jr., R. E. Eggleton, P. L. Jackson, R. Jordan, W. I. Linlor, W. J. Peeples, L. J. Porcello, J. Ryu, G. Schaber, W. R. Sill, T.W Thompson, S. H. Ward, and J. S. Zelenka, Apollo lunar sounder experiment, NASA Spec. Publ., 330, 22–1–22–26, 1973.Google Scholar
  19. Picardi, G., J. J. Plaut, D. Biccari, O. Bombaci, D. Calabrese, M. Cartacci, A. Cicchetti, S. M. Clifford, P. Edenhofer, W.M. Farrell, C. Federico, A. Frigeri, D. A. Gurnett, T. Hagfors, E. Heggy, A. Herique, R. L. Huff, A. B. Ivanov, W. T. K. Johnson, R. L. Jordan, D. L. Kirchner, W. Kofman, C. J. Leuschen, E. Nielsen, R. Orosei, E. Pettinelli, R. J. Phillips, D. Plettemeier, A. Safaeinili, R. Seu, E. R. Stofan, G. Vannaroni, T. R. Watters, and E. Zampolini, Radar Soundings of the Subsurface of Mars, Science, 310, no. 5756, 1925-1928, DOI: 10.1126/science.1122165, 2005.Google Scholar
  20. Porcello, L. J., R. L. Jordan, J. S. Zelenka, G. F. Adams, R. J. Phillips, W. E. Brown Jr., S. H. Ward, and P. L. Jackson, The Apollo lunar sounder radar system, Proc. IEEE, 62, 769–783, 1974.CrossRefGoogle Scholar
  21. Sharpton, V. L. and J. W. Head III, Stratigraphy and structural evolution of southern Mare Serenitatis: a reinterpretation based on Apollo lunar sounder experiment data, J. Geophys. Res., 87(B13), 10983–10998, 1982.CrossRefGoogle Scholar
  22. Strangway, D. W. and G. R. Olhoeft, Electrical properties of planetary surfaces, Phil. Trans. R. Soc. London, A., 285, 441–450, 1977.CrossRefGoogle Scholar
  23. Yamaji, A., S. Sasaki, Y. Yamaguchi, T. Ono, J. Haruyama, and T. Okada, Lunar tectonics and its implications for the origin and evolution of the moon, Mem. Geol. Soc. Japan, 50, 213–226, 1998.Google Scholar
  24. Watters, T. R., C. J. Leuschen, J. J. Plaut, G. Picardi, A. Safaeinili, S. M. Clifford, W. M. Farrell, A. B. Ivanov, R. J. Phillips, and E. R. Stofan, MARSIS radar sounder evidence of buried basins in the northern lowlands of Mars, Nature, 444, 905–908, doi:10.1038/nature05356, 2006. T. Ono (e-mail:, A. Kumamoto, Y. Yamaguchi, A. Yamaji, T. Kobayashi, Y. Kasahara, and H. OyaCrossRefGoogle Scholar

Copyright information

© The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences. 2008

Authors and Affiliations

  • Takayuki Ono
    • 1
  • Atsushi Kumamoto
    • 1
  • Yasushi Yamaguchi
    • 2
  • Atsushi Yamaji
    • 3
  • Takao Kobayashi
    • 4
  • Yoshiya Kasahara
    • 5
  • Hiroshi Oya
    • 6
  1. 1.Graduate School of ScienceTohoku UniversitySendaiJapan
  2. 2.Graduate School of Environmental StudiesNagoya UniversityNagoyaJapan
  3. 3.Graduate School of ScienceKyoto UniversityKyotoJapan
  4. 4.Korea Institute of Geoscience & Mineral Resources (KIGAM)Yuseong-gu, DaejeonKorea
  5. 5.Information Media Center of Kanazawa UniversityKanazawaJapan
  6. 6.Fukui University of TechnologyFukuiJapan

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