H. Demura

University of Aizu

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Naru Hirata

University of Aizu

Chikatoshi Honda

Ehime University

Y. Yokota

Institute of Space and Astronautical Science

Tomokatsu Morota

Tokyo University of Science

Tsuneo Matsunaga

National Institute for Environmental Studies

M. Ohtake

Japan Aerospace Exploration Agency

Hideaki Miyamoto

Kyoto University

J. Haruyama

Institute of Space and Astronautical Science

Yoshiko Ogawa

University of Aizu

J. Saito

National Institute of Technology, Ichinoseki College

Cooperative Institutions

Japan Aerospace Exploration Agency

176

Institute of Space and Astronautical Science

161

The University of Tokyo

124

Planetary Science Institute

National Sagamihara Hospital

University of Aizu

Osaka University

National Astronomical Observatory of Japan

The Graduate University for Advanced Studies, SOKENDAI

Kobe University

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Preliminary integration of Digital Terrain Model (LISM) and Topographic Profile (LALT), Kaguya.

LPI (2008)

H. Demura T. Hodokuma Naru Hirata N. Asada J. Haruyama

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Citations (1)

Scientific Goals of Hayabusa-2 LIDAR Experiment

AAS/Division for Planetary Sciences Meeting Abstracts #45 (2013)

Hiroki Senshu Noriyuki Namiki Takahide Mizuno Naru Hirata Hirotomo Noda

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Characterizing and navigating small bodies with imaging data

Meteoritics and Planetary Science (2008)

R. W. Gaskell O. S. Barnouin Daniel J. Scheeres A. S. Konopliv T. Mukai

Abstract— Recent advances in the characterization of small body surfaces with stereophotoclinometry are discussed. The principal data output is an ensemble of landmark maps (L‐maps), high‐resolution topography/albedo maps of varying resolution that tile the surface of the body. Because they can have a resolution comparable to the best images, and can be located on a global reference frame to high accuracy, L‐maps provide a significant improvement in discriminatory power for studies of small bodies, ranging from regolith processes to interior structure. These techniques are now being used to map larger bodies such as the Moon and Mercury. L‐maps are combined to produce a standard global topography model (GTM) with about 1.57 million vectors and having a wide variety of applications. They can also be combined to produce high‐resolution topography maps that describe local areas with much greater detail than the GTM. When combined with nominal predictions from other data sources and available data from other instruments such as LIDAR or RADAR, solutions for the spacecraft position and camera pointing are the most accurate available. Examples are drawn from studies of Phobos, Eros, and Itokawa, including surface characterization, gravity analysis, spacecraft navigation, and incorporation of LIDAR or RADAR data. This work has important implications for potential future missions such as Deep Interior and the level of navigation and science that can be achieved.

Regolith

Ranging

10.1111/j.1945-5100.2008.tb00692.x

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Citations (240)

A survey of possible impact structures on 25143 Itokawa

Icarus (2009)

Naru Hirata O. S. Barnouin Chikatoshi Honda Ryosuke Nakamura Hideaki Miyamoto

Hypervelocity

10.1016/j.icarus.2008.10.027

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Citations (78)

Anomalously porous boulders on (162173) Ryugu as primordial materials from its parent body

Nature Astronomy (2021)

Naoya Sakatani Satoshi Tanaka Tatsuaki Okada T. Fukuhara Lucie Riu

10.1038/s41550-021-01371-7

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Citations (39)

A shallow volatile layer at Chryse Planitia, Mars

Earth Planets and Space (2014)

H. Demura Kei Kurita

We have investigated size distribution of rampart craters in the east edge of Chryse Planitia on Mars by Viking high resolution images. Clear existence of the onset diameter of rampart crater, which defines the minimum size of the rampart crater, has been recognized. If this diameter corresponds to the depth to the top of the volatile layer, the converted depth ranges from ∼20 m to 60 m. These values are systematically shallower than the previous estimates (Kuzmin, 1988). Martian volatile layer is thought as a main reservoir of the ancient fluvial processes and atmospheric water vapor. This shallow volatile layer gives us information of the inventory of Martian water and conditions of cryosphere.

Atmosphere of Mars

10.1186/bf03352129

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Crustal deformation around Azumayama volcano : InSAR analysis compared with GNSS data

Japan Geoscience Union (2017)

Kana Abe Yoshiko Ogawa Yasuhiro Hisada H. Demura Satoshi Miura

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Mass and Local Topography Measurements of Itokawa by Hayabusa

Science (2006)

Shinsuke Abe T. Mukai Naru Hirata O. S. Barnouin A. F. Cheng

The ranging instrument aboard the Hayabusa spacecraft measured the surface topography of asteroid 25143 Itokawa and its mass. A typical rough area is similar in roughness to debris located on the interior wall of a large crater on asteroid 433 Eros, which suggests a surface structure on Itokawa similar to crater ejecta on Eros. The mass of Itokawa was estimated as (3.58 +/- 0.18) x 10(10) kilograms, implying a bulk density of (1.95 +/- 0.14) grams per cubic centimeter for a volume of (1.84 +/- 0.09) x 10(7) cubic meters and a bulk porosity of approximately 40%, which is similar to that of angular sands, when assuming an LL (low iron chondritic) meteorite composition. Combined with surface observations, these data indicate that Itokawa is the first subkilometer-sized small asteroid showing a rubble-pile body rather than a solid monolithic asteroid.

Rubble

10.1126/science.1126272

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Citations (237)

Scientific use of LIDAR Data of Hayabusa-2 Mission

LPI (2013)

Noriyuki Namiki Takahide Mizuno Naru Hirata Hirotomo Noda H. Senshu

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Citations (4)

Approach to Crater Chronology with Fourier Transform of Digital Terrain Model

Lunar and Planetary Science Conference (2010)