Search

Your search keyword '"Demura, Hirohide"' showing total 225 results
Start Over Author "Demura, Hirohide"
225 results on '"Demura, Hirohide"'

1. Thermophysical Model Development for Hera Mission to Simulate Non-Gravitational Acceleration on Binary Asteroid

Author

Kanamaru, Masanori, Okada, Tatsuaki, Senshu, Hiroki, Demura, Hirohide, Hirata, Naru, Horikawa, Yuto, and Tommei, Giacomo

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

The surface temperature of an asteroid is fundamental information for the design of an exploration mission and the interpretation of scientific observations. In addition, the thermal radiation of the asteroid causes a non-gravitational acceleration that induces secular changes in its orbit and spin. We have been developing a numerical calculation library for simulating the dynamics and thermophysics of asteroids. The asteroid dynamical simulator, \texttt{Astroshaper}, can calculate the temperature distribution based on a 3-dimensional shape model of an asteroid and predict the non-gravitational acceleration. In recent years, asteroid exploration missions such as Hayabusa2 and Hera have been equipped with thermal infrared imagers. The asteroid thermography can provide the thermal properties of the surface material of the target bodies. The functionality of thermophysical modeling in \texttt{Astroshaper} contributes to simulating the thermal environment on the asteroids, estimating the thermal properties, and predicting the dynamical evolution controlled by the non-gravitational effects.

Published
2023

2. Thermophysical properties of the surface of asteroid 162173 Ryugu: Infrared observations and thermal inertia mapping

Author

Shimaki, Yuri, Senshu, Hiroki, Sakatani, Naoya, Okada, Tatsuaki, Fukuhara, Tetsuya, Tanaka, Satoshi, Taguchi, Makoto, Arai, Takehiko, Demura, Hirohide, Ogawa, Yoshiko, Suko, Kentaro, Sekiguchi, Tomohiko, Kouyama, Toru, Hasegawa, Sunao, Takita, Jun, Matsunaga, Tsuneo, Imamura, Takeshi, Wada, Takehiko, Kitazato, Kohei, Hirata, Naru, Hirata, Naoyuki, Noguchi, Rina, Sugita, Seiji, Kikuchi, Shota, Yamaguchi, Tomohiro, Ogawa, Naoko, Ono, Go, Mimasu, Yuya, Yoshikawa, Kent, Takahashi, Tadateru, Takei, Yuto, Fujii, Atsushi, Takeuchi, Hiroshi, Yamamoto, Yukio, Yamada, Manabu, Shirai, Kei, Iijima, Yu-ichi, Ogawa, Kazunori, Nakazawa, Satoru, Terui, Fuyuto, Saiki, Takanao, Yoshikawa, Makoto, Tsuda, Yuichi, and Watanabe, Sei-ichiro

Published
2020
Full Text
View/download PDF

4. Highly porous nature of a primitive asteroid revealed by thermal imaging

Author

Okada, Tatsuaki, Fukuhara, Tetsuya, Tanaka, Satoshi, Taguchi, Makoto, Arai, Takehiko, Senshu, Hiroki, Sakatani, Naoya, Shimaki, Yuri, Demura, Hirohide, Ogawa, Yoshiko, Suko, Kentaro, Sekiguchi, Tomohiko, Kouyama, Toru, Takita, Jun, Matsunaga, Tsuneo, Imamura, Takeshi, Wada, Takehiko, Hasegawa, Sunao, Helbert, Jörn, Müller, Thomas G., Hagermann, Axel, Biele, Jens, Grott, Matthias, Hamm, Maximilian, Delbo, Marco, Hirata, Naru, Hirata, Naoyuki, Yamamoto, Yukio, Sugita, Seiji, Namiki, Noriyuki, Kitazato, Kohei, Arakawa, Masahiko, Tachibana, Shogo, Ikeda, Hitoshi, Ishiguro, Masateru, Wada, Koji, Honda, Chikatoshi, Honda, Rie, Ishihara, Yoshiaki, Matsumoto, Koji, Matsuoka, Moe, Michikami, Tatsuhiro, Miura, Akira, Morota, Tomokatsu, Noda, Hirotomo, Noguchi, Rina, Ogawa, Kazunori, Shirai, Kei, Tatsumi, Eri, Yabuta, Hikaru, Yokota, Yasuhiro, Yamada, Manabu, Abe, Masanao, Hayakawa, Masahiko, Iwata, Takahiro, Ozaki, Masanobu, Yano, Hajime, Hosoda, Satoshi, Mori, Osamu, Sawada, Hirotaka, Shimada, Takanobu, Takeuchi, Hiroshi, Tsukizaki, Ryudo, Fujii, Atsushi, Hirose, Chikako, Kikuchi, Shota, Mimasu, Yuya, Ogawa, Naoko, Ono, Go, Takahashi, Tadateru, Takei, Yuto, Yamaguchi, Tomohiro, Yoshikawa, Kent, Terui, Fuyuto, Saiki, Takanao, Nakazawa, Satoru, Yoshikawa, Makoto, Watanabe, Seiichiro, and Tsuda, Yuichi

Published
2020
Full Text
View/download PDF

6. The Hayabusa Spacecraft Asteroid Multi-Band Imaging Camera: AMICA

Author

Ishiguro, Masateru, Nakamura, Ryosuke, Tholen, David J., Hirata, Naru, Demura, Hirohide, Nemoto, Etsuko, Nakamura, Akiko M., Higuchi, Yuta, Sogame, Akito, Yamamoto, Aya, Kitazato, Kohei, Yokota, Yasuhiro, Kubota, Takashi, Hashimoto, Tatsuaki, and Saito, Jun

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

The Hayabusa Spacecraft Asteroid Multiband Imaging Camera (AMICA) has acquired more than 1400 multispectral and high-resolution images of its target asteroid, 25143 Itokawa, since late August 2005. In this paper, we summarize the design and performance of AMICA. In addition, we describe the calibration methods, assumptions, and models, based on measurements. Major calibration steps include corrections for linearity and modeling and subtraction of bias, dark current, read-out smear, and pixel-to-pixel responsivity variations. AMICA v-band data were calibrated to radiance using in-flight stellar observations. The other band data were calibrated to reflectance by comparing them to ground-based observations to avoid the uncertainty of the solar irradiation in those bands. We found that the AMICA signal was linear with respect to the input signal to an accuracy of << 1% when the signal level was < 3800 DN. We verified that the absolute radiance calibration of the AMICA v-band (0.55 micron) was accurate to 4% or less, the accuracy of the disk-integrated spectra with respect to the AMICA v-band was about 1%, and the pixel-to-pixel responsivity (flatfield) variation was 3% or less. The uncertainty in background zero-level was 5 DN. From wide-band observations of star clusters, we found that the AMICA optics have an effective focal length of 120.80 \pm 0.03 mm, yielding a field-of-view (FOV) of 5.83 deg x 5.69 deg. The resulting geometric distortion model was accurate to within a third of a pixel. We demonstrated an image-restoration technique using the point-spread functions of stars, and confirmed that the technique functions well in all loss-less images. An artifact not corrected by this calibration is scattered light associated with bright disks in the FOV., Comment: 107 pages, 22 figures, 9 tables. will appear in Icarus

Published
2009
Full Text
View/download PDF

8. Mass and Local Topography Measurements of Itokawa by Hayabusa

Author

Abe, Shinsuke, Mukai, Tadashi, Hirata, Naru, Barnouin-Jha, Olivier S., Cheng, Andrew F., Demura, Hirohide, Gaskell, Robert W., Hashimoto, Tatsuaki, Hiraoka, Kensuke, Honda, Takayuki, Kubota, Takashi, Matsuoka, Masatoshi, Mizuno, Takahide, Nakamura, Ryosuke, Scheeres, Daniel J., and Yoshikawa, Makoto

Published
2006

9. Observation of Ozegahara mire and estimation of environmental changes using satellite radar

Author

Hisada, Yasuhiro, Ogawa, Yoshiko, and Demura, Hirohide

Subjects
drones, synthetic aperture radar(SAR), 衛星観測, ドローン, backscatter coefficient, Ozegahara mire, 合成開口レーダ（SAR）, 尾瀬ヶ原湿原, satellite observation, 後方散乱係数
Abstract

尾瀬ヶ原は本州最大の湿原であり，東西6キロ，南北2キロにわたる広大な地域で，かつ環境保護のため木道以外の立ち入りが厳しく制限されている．そのため，立ち入ることのできない領域の動植物相，水文・水質などを把握することが困難である．本稿では，人工衛星に搭載された合成開口レーダー（SAR: Synthetic Aperture Radar）による観測に基づいて，木道付近に制限されることがない湿原の環境について推定する．尾瀬ヶ原全域に対する夏季，冬季のSAR画像から，湿原域・非湿原域の推測が可能だった．また，背中アブリ田代と泉水田代のSAR画像とドローンによる空撮画像との詳細な比較から．湿原域の識別を追認し，ドローン画像では識別が困難な土砂堆積領域を識別できた．また，植生に対応した調査地点の3衛星に亘る後方散乱係数の時系列変化から，各衛星レーダーのセンサー感度が異なっている可能性が高く，全期間にわたって比較することは困難であった．しかしながら，後方散乱係数の取る値は植生によって異なり，ミズゴケクラス＜ヌマガヤオーダー＜拠水林という関係になっている．いくつかの調査地点において後方散乱係数の上昇傾向が認められたが，その要因の一つとして考えられる降水量との関係性は明らかにできなかった．, Ozegahara mire is the largest wetland in Honshu, Japan, covering a vast area of 6 km from east to west and 2 km from north to south, and access to this area is strictly restricted except by wooden roads for environmental protection. Therefore, it is difficult to grasp the flora, fauna, hydrology, and water quality in the inaccessible areas. In this paper, we estimate the environment of the wetland based on observations using Synthetic Aperture Radar(SAR) onboard the satellite. From the SAR images of the entire Ozegahara area in summer and winter, it was possible to discriminate between mire and non-mire areas. By comparing the SAR images of Senaka-aburi tashiro and Sensui tashiro with the aerial images taken by a drone, we were able to reconfirm the identification of mire areas and to identify the area where sediment was deposited, which was difficult to identify in the drone images. Based on the results of the time series of backscatter coefficients across the three satellites (JERS-1, ALOS-1, 2), it was difficult to direct compare the results over the entire period because the sensor sensitivity of each satellite radar was likely to be different. However, it was shown that the value range of the backscatter coefficient varied depending on the vegetation. Although there was an upward trend in the backscatter coefficient at some of the investigation sites, the relationship with precipitation, which could be one of the factors, could not be clarified.

Published
2022

10. Research and development of a GUI tool for lunar crater automatic detection using ortho image and DTM/DEM based on SELENE terrain camera stereo data

Author

HARUYAMA, Junichi, DEMURA, Hirohide, HARA, Seiichi, and FUJIWARA, Tomohiro

Subjects
Terrain Camera, DTM, SELENE, GUI, DEM, crater automatic detection, moon, Kaguya
Abstract

我々は，月面のクレータの検知（数え上げ）を自動的に行う GUI ツールの研究開発を行っ たので，ここに報告する．クレータ検知は，クレータを単位面積当たりの多寡により，月 面がいつ出来たか，あるいはいつ熔岩によって被覆されたかを調べるクレータ年代学の基 礎となるもので，惑星科学にとって重要である．しかし，月面の人によるクレータの検知 は，時に非常に時間を要し，また誤検知，検知漏れすることも往々にしてある．そこで我々 は，月面のクレータを自動検知する手法（アルゴリズム）を組み込んだ GUI ツールを作成 した．この GUI ツールは，月周回探査機セレーネ（SELENE；愛称「かぐや」）に搭載された 地形カメラによって得られた立体視データから同時作成された可視画像データ（オルソ画 像）と標高データ（数値地形/標高モデル；DTM/DEM）を入力とする．このツールは広く一 般に公開される．, We have studied and developed a GUI tool that automatically detects (counts) craters of the Moon. Crater detection is important for planetary science because it is the basis of crater chronology to find out when the lunar surface was formed or covered with lava by the amount of crater per unit area. However, it is almost inevitable that the detection of craters scattered on the lunar surface by human takes a very long time, and false detections and omissions often occur. Therefore, we created a GUI tool incorporating a method (algorithm) that automatically detects craters on the lunar surface. In this GUI tool, input data are visible ortho-rectified images and digital terrain/elevation model data which were simultaneously produced from stereopair data obtained by the terrain camera onboard a lunar orbiter SELENE (nicknamed "Kaguya"). This tool is open to the public., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA2130022000, レポート番号: JAXA-RM-21-008

Published
2022

12. Thermal Infrared Imaging Experiments of C-Type Asteroid 162173 Ryugu on Hayabusa2

Author

Okada, Tatsuaki, Fukuhara, Tetsuya, Tanaka, Satoshi, Taguchi, Makoto, Imamura, Takeshi, Arai, Takehiko, Senshu, Hiroki, Ogawa, Yoshiko, Demura, Hirohide, Kitazato, Kohei, Nakamura, Ryosuke, Kouyama, Toru, Sekiguchi, Tomohiko, Hasegawa, Sunao, Matsunaga, Tsuneo, Wada, Takehiko, Takita, Jun, Sakatani, Naoya, Horikawa, Yamato, Endo, Ken, Helbert, Jörn, Müller, Thomas G., and Hagermann, Axel

Published
2017
Full Text
View/download PDF

13. Pole and Global Shape of 25143 Itokawa

Author

Demura, Hirohide, Kobayashi, Shingo, Nemoto, Etsuko, Matsumoto, Naoya, Furuya, Motohiro, Yukishita, Akira, Muranaka, Noboru, Morita, Hideo, Shirakawa, Ken, Maruya, Makoto, Ohyama, Hiroshi, Uo, Masashi, Kubota, Takashi, Hashimoto, Tatsuaki, Kawaguchi, Jun'ichiro, Fujiwara, Akira, Saito, Jun, Sasaki, Sho, Miyamoto, Hideaki, and Hirata, Naru

Published
2006

14. WISE-CAPS: Web-Based Interactive Secure Environment for Collaborative Analysis of Planetary Science

Author

Terazono, Junya, Nakamura, Ryosuke, Kodama, Shinsuke, Yamamoto, Naotaka, Demura, Hirohide, Hirata, Naru, Ogawa, Yoshiko, Haruyama, Jun’ichi, Ohtake, Makiko, Matsunaga, Tsuneo, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Yoshikawa, Masatoshi, editor, Meng, Xiaofeng, editor, Yumoto, Takayuki, editor, Ma, Qiang, editor, Sun, Lifeng, editor, and Watanabe, Chiemi, editor

Published
2010
Full Text
View/download PDF

16. Exploring Structural and Dimensional Similarities Within—Lunar Nomenclature System Using Query Interfaces

Author

Terazono, Junya, Izumita, Tomoko, Asada, Noriaki, Demura, Hirohide, Hirata, Naru, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, and Bhalla, Subhash, editor

Published
2007
Full Text
View/download PDF

17. Calibration of the Thermal Infrared Imager TIRI onboard Hera

Author

Okada, Tatsuaki, primary, Tanaka, Satoshi, additional, Sakatani, Naoya, additional, Shimaki, Yuri, additional, Arai, Takehiko, additional, Senshu, Hiroki, additional, Demura, Hirohide, additional, Sekiguchi, Tomohiko, additional, Kouyama, Toru, additional, Kanamaru, Masanori, additional, and Ishizaki, Takuya, additional

Published
2022
Full Text
View/download PDF

19. Thermal Infrared Imaging Experiments of C-Type Asteroid 162173 Ryugu on Hayabusa2

Author

Okada, Tatsuaki, primary, Fukuhara, Tetsuya, additional, Tanaka, Satoshi, additional, Taguchi, Makoto, additional, Imamura, Takeshi, additional, Arai, Takehiko, additional, Senshu, Hiroki, additional, Ogawa, Yoshiko, additional, Demura, Hirohide, additional, Kitazato, Kohei, additional, Nakamura, Ryosuke, additional, Kouyama, Toru, additional, Sekiguchi, Tomohiko, additional, Hasegawa, Sunao, additional, Matsunaga, Tsuneo, additional, Wada, Takehiko, additional, Takita, Jun, additional, Sakatani, Naoya, additional, Horikawa, Yamato, additional, Endo, Ken, additional, Helbert, Jörn, additional, Müller, Thomas G., additional, and Hagermann, Axel, additional

Published
2016
Full Text
View/download PDF

20. 小惑星探査画像データの閲覧・検索システムJADE: JAXA Asteroid Data Explorer

Author

KIKUCHI, Hiroshi, YAMAMOTO, Mitsuo, YOKOTA, Yasuhiro, SATO, Hiroyuki, OTAKE, Hisashi, HONDA, Rie, SUGITA, Seiji, MOROTA, Tomokatsu, ISHIKAWA, Toru, KONISHI, Takeshi, IMAKI, Kazuya, WATABE, Yasuyuki, HEMMI, Ryodo, MIYAMOTO, Hideaki, YAMAMOTO, Yukio, HIRATA, Naru, HIRATA, Naoyuki, SASAKI, Sho, KOMATSU, Goro, DEMURA, Hirohide, HONDA, Chikatoshi, YAMADA, Manabu, KAMEDA, Shingo, TATSUMI, Eri, MURAKAMI, Shin-ya, CHO, Yuichiro, YOSHIKAWA, Kazuo, SAWADA, Hirotaka, SAKATANI, Naoya, HAYAKAWA, Masahiko, MATSUOKA, Moe, KOUYAMA, Toru, SUZUKI, Hidehiko, and OAGAWA, Kazunori

Abstract

2021年度宇宙科学情報解析シンポジウム(2022年2月18日. オンライン開催), Space Science Informatics Symposium FY2021(February 18, 2022. Online Meeting), 著者人数: 34名, 資料番号: SA6000169014

Published
2022

21. Heraによる二重小惑星Didymos探査計画とPlanetary Defenseへの取り組み

Author

OKADA, Tatsuaki, TANAKA, Satoshi, SHIMAKI, Yuri, SAKATANI, Naoya, ARAI, Takehiko, SENSHU, Hiroki, DEMURA, Hirohide, SEKIGUCHI, Tomohiko, KANAMARU, Masanori, ISHIZAKI, Takuya, KOUYAMA, Toru, WADA, Takehiko, ARAKAWA, Masahiko, NAKAMURA, Akiko, SUGITA, Seiji, MIYAMOTO, Hideaki, YOSHIKAWA, Makoto, ABE, Shinsuke, ABE, Masanao, IKENAGA, Toshinori, URAKAWA, Seitaro, KIKUCHI, Shota, KITAZATO, Kohei, KOMATSU, Goro, SASAKI, Sho, TATSUMI, Eri, TSUDA, Yuichi, NOGUCHI, Takaaki, YABUTA, Hikaru, and WATANABE, Seiichiro

Abstract

第22回宇宙科学シンポジウム (2022年1月6日-7日. オンライン開催), 22nd Space Science Symposium (January 6-7, 2022. Online Meeting), 著者人数: 30名, 資料番号: SA6000176018, レポート番号: S5-002

Published
2022

22. Long-Lived Volcanism on the Lunar Farside Revealed by SELENE Terrain Camera

Author

Haruyama, Junichi, Ohtake, Makiko, Matsunaga, Tsuneo, Morota, Tomokatsu, Honda, Chikatoshi, Yokota, Yasuhiro, Abe, Masanao, Ogawa, Yoshiko, Miyamoto, Hideaki, Iwasaki, Akira, Pieters, Carle M., Asada, Noriaki, Demura, Hirohide, Hirata, Naru, Terazono, Junya, Sasaki, Sho, Saiki, Kazuto, Yamaji, Atsushi, Torii, Masaya, and Josset, Jean-Luc

Published
2009
Full Text
View/download PDF

23. Regolith Migration and Sorting on Asteroid Itokawa

Author

Miyamoto, Hideaki, Yano, Hajime, Scheeres, Daniel J., Abe, Shinsuke, Barnouin-Jha, Olivier, Cheng, Andrew F., Demura, Hirohide, Gaskell, Robert W., Hirata, Naru, Ishiguro, Masateru, Michikami, Tatsuhiro, Nakamura, Akiko M., Nakamura, Ryosuke, Saito, Jun, and Sasaki, Sho

Published
2007
Full Text
View/download PDF

24. Science and development of the thermal imager TIRI on the ESA Hera mission

Author

Hera TIRIチーム, OKADA, Tatsuaki, TANAKA, Satoshi, FUKUHARA, Tetsuya, SAKATANI, Naoya, SHIMAKI, Yuri, SENSHU, Hiroki, ARAI, Takehiko, DEMURA, Hirohide, KOUYAMA, Toru, SEKIGUCHI, Tomohiko, and Hera TIRI Team

Abstract

第21回宇宙科学シンポジウム (2021年1月6日-7日. オンライン開催), 21st Space Science Symposium (January 6-7, 2021. Online Meeting), 資料番号: SA6000163177, レポート番号: Pb.03

Published
2021

28. はやぶさ２による小惑星リュウグウの科学観測成果

Author

WATANABE, Sei-ichiro, YOSHIKAWA, Makoto, TANAKA, Satoshi, SUGITA, Seiji, NAMIKI, Noriyuki, KITAZATO, Kohei, OKADA, Tatsuaki, ARAKAWA, Masahiko, TACHIBANA, Shogo, ISHIGURO, Masateru, IKEDA, Hitoshi, DEMURA, Hirohide, HIRATA, Naru, YAMAMOTO, Yukio, JAUMANN, Ralf, BIBRING, Jean-Pierre, GROTT, Matthias, GLASSMEIR, Karl-Heinz, SAIKI, Takanao, and TSUDA, Yuichi

Abstract

第20回宇宙科学シンポジウム (2020年1月8日-9日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 20th Space Science Symposium (January 8-9, 2020. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 20名, 資料番号: SA6000152064, レポート番号: P1.38

Published
2020

29. 小惑星探査Hera搭載熱赤外カメラTIRIによる観測計画

Author

OKADA, Tatsuaki, FUKUHARA, Tetsuya, TANAKA, Satoshi, TAGUCHI, Makoto, SENSHU, Hiroki, ARAI, Takehiko, SAKATANI, Naoya, SHIMAKI, Yuri, KOUYAMA, Toru, DEMURA, Hirohide, and SEKIGUCHI, Tomohiko

Abstract

第20回宇宙科学シンポジウム (2020年1月8日-9日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 20th Space Science Symposium (January 8-9, 2020. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 11名, 資料番号: SA6000152066, レポート番号: P1.40

Published
2020

30. Geometric Correction for Thermographic Images of Asteroid 162173 Ryugu by TIR (Thermal Infrared Imager) onboard Hayabusa2

Author

Arai, Takehiko, primary, Okada, Tatsuaki, additional, Tanaka, Satoshi, additional, Fukuhara, Tetsuya, additional, Demura, Hirohide, additional, Kouyama, Toru, additional, Sakatani, Naoya, additional, Shimaki, Yuri, additional, Senshu, Hiroki, additional, Sekiguchi, Tomohiko, additional, Takita, Jun, additional, Hirata, Naru, additional, and Yamamoto, Yukio, additional

Published
2021
Full Text
View/download PDF

34. Characterization of Multiband Imager Aboard SELENE

Author

Kodama, Shinsuke, primary, Ohtake, Makiko, additional, Yokota, Yasuhiro, additional, Iwasaki, Akira, additional, Haruyama, Junichi, additional, Matsunaga, Tsuneo, additional, Nakamura, Ryosuke, additional, Demura, Hirohide, additional, Hirata, Naru, additional, Sugihara, Takamitsu, additional, and Yamamoto, Yasuji, additional

Published
2010
Full Text
View/download PDF

35. Geometric Correction for Thermal Imaging of Asteroid Ryugu Observed by TIR onboard Hayabusa2

Author

Arai, Takehiko, primary, Okada, Tatsuaki, additional, Tanaka, Satoshi, additional, Fukuhara, Tetsuya, additional, Demura, Hirohide, additional, Kouyama, Toru, additional, Sakatani, Naoya, additional, Shimaki, Yuri, additional, Senshu, Hiroki, additional, Sekiguchi, Tomohiko, additional, Takita, Jun, additional, Hirata, Naru, additional, and Yamamoto, Yukio, additional

Published
2020
Full Text
View/download PDF

38. The global distribution of pure anorthosite on the Moon

Author

Ohtake, Makiko, Matsunaga, Tsuneo, Haruyama, Junichi, Yokota, Yasuhiro, Morota, Tomokatsu, Honda, Chikatoshi, Ogawa, Yoshiko, Torii, Masaya, Miyamoto, Hideaki, Arai, Tomoko, Hirata, Naru, Iwasaki, Akira, Nakamura, Ryosuke, Hiroi, Takahiro, Sugihara, Takamitsu, Takeda, Hiroshi, Otake, Hisashi, Pieters, Carle M., Saiki, Kazuto, Kitazato, Kohei, Abe, Masanao, Asada, Noriaki, Demura, Hirohide, Yamaguchi, Yasushi, Sasaki, Sho, Kodama, Shinsuke, Terazono, Junya, Shirao, Motomaro, Yamaji, Atsushi, Minami, Shigeyuki, Akiyama, Hiroaki, and Josset, Jean-Luc

Published
2009
Full Text
View/download PDF

39. Surface physical condition of asteroid Ryugu using close-up optical and thermal images

Author

Sakatani, N., Sugita, S., Honda, R., Morota, T., Yamada, M., Kameda, Shingo, Tatsumi, E., Yokota, S., Kouyama, T., Suzuki, H., Honda, C., Hayakawa, M., Yoshioka, K., Matsuoko, Moe, Cho, Y., Sawada, H., Ogawa, N., Miura, A., Okada, T., Tanaka, S., Senshu, H., Arai, T., Demura, Hirohide, Suko, K., Shimaki, Y., Sekigucchi, T., Takita, J., Fuhuhara, T., Tagutchi, M., Müller, T., Hagermann, A., Biele, Jens, Grott, Matthias, and Delbo, M.

Subjects
Hayabusa 2, Planetenphysik, Ryugu, Nutzerzentrum für Weltraumexperimente (MUSC)
Abstract

In 2018, the Hayabusa2 spacecraft [1] successfully conducted some descend operations toward Ryugu’s surface. They included MINERVA rover release in September, MASCOT lander release and two touchdown rehearsals in October. During these operations, we acquired high-resolved optical and thermal images from altitudes below 100 m, us- ing Optical Navigation Camera (ONC-T) and Ther- mal Infrared Imager (TIR), respectively. Close-up optical images by ONC-T show detailed physical conditions of the surface materials, such as particle size distribution of pebbles, surface morphol- ogy of small boulders and craters. Moreover, close-up thermal images by TIR indicate thermophysical prop- erties of the surface materials and its regional differ- ence, which cannot be resolved by higher altitude observations (e.g., home-position observations from 20 km altitude). Combination between optical and thermal observations is of great importance to under- stand the nature of the asteroid surface materials. In this study, we investigate the surface particle size from close-up ONC images. Thermophysical property of the surface component materials inferred from TIR images is also discussed, especially for the range observed for the thermal inertia of boulders.

Published
2019

40. 宇宙リモートセンシングデータを利活用した課題解決型ICT学習の実践

Author

Demura, Hirohide, Hirata, Naru, Ogawa, Yoshiko, Honda, Chikatoshi, Kitazato, Kohei, Okudaira, Kyoko, and Ishibashi, Shiro

Abstract

平成30年度宇宙科学情報解析シンポジウム（2019年2月15日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)）, 相模原市, 神奈川県, Space Science Informatics Symposium FY2018 (February 15, 2019. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 資料番号: SA6000133004

Published
2019

41. 火星表面探査のための生命探査顕微鏡(LDM)開発の現状

Author

Yoshimura, Yoshitaka, Yamagishi, Akihiko, Satoh, Takehiko, Miyakawa, Atsuo, Sasaki, Satoshi, Enya, Keigo, Kobayashi, Kensei, Kebukawa, Yoko, Okada, Tomoka, Yabuta, Hikaru, Mita, Hajime, Imai, Eiichi, Naganuma, Takeshi, Demura, Hirohide, Fujita, Kazuhisa, and Usui, Tomohiro

Abstract

第19回宇宙科学シンポジウム (2019年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 19th Space Science Symposium (January 9-10, 2019. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 16名, 資料番号: SA6000144138, レポート番号: P-103

Published
2019

42. Thermal inertia of asteroid Ryugu using dawn-side thermal images by TIR on Hayabusa2

Author

Okada, T., Fukuhara, Tetsuya, Tanaka, Satoshi, Taguchi, Makoto, Arai, Takehiko, Sakatani, Naoya, Shimaki, Yuri, Senshu, Hiroki, Demura, Hirohide, Ogawa, Yoshiko, Suko, Kentaro, Sekiguchi, Tomohiko, Kouyama, Toru, Helbert, Jörn, Müller, T., Hagermann, Axel, Biele, Jens, Grott, Matthias, Hamm, Maximilian, and Delbo, Marco

Subjects
TIR, asteroid, Planetenphysik, Physics::Space Physics, Leitungsbereich PF, thermal images, Ryugu, Astrophysics::Earth and Planetary Astrophysics, Thermal inertia, Hayabusa2, Nutzerzentrum für Weltraumexperimente (MUSC)
Abstract

A thermal inertia map of the C-type Near-Earth asteroid 162173 Ryugu has been derived using the one-rotation global thermal image sets observed from the Home Position at 20 km altitude [1]. This time the thermal images of the night side areas of the surface just before sunrise were taken during observations from the dawn side. The coldest brightness temperature of the surface indicates another information on the thermal inertia of the surface. The thermal inertia is preliminary estimated at 250 [J m-2K-1s-0.5] or lower, which is consistent with other than those derived from the daytime observations [2].

Published
2019

43. DESTINY+によるふたご座流星群母天体Phaethonのフライバイ探査

Author

Ralph, Srama, Harald, Kruger, Arai, Tomoko, Kobayashi, Masanori, Ishibashi, Ko, Yamada, Manabu, Wada, Koji, Senshu, Hiroki, Yoshida, Fumi, Kimura, Hiroshi, Hirai, Takayuki, Peng, Hong, Srama, Ralph, Kruger, Harald, Kameda, Shingo, Kagitani, Masato, Okamoto, Naoya, Ishiguro, Masateru, Watanabe, Junnichi, Ohsuka, Katsuhito, Ito, Takashi, Nakamura, Tomoki, Yabuta, Hikaru, Tachibana, Shogo, Mikouchi, Takashi, Komatsu, Mutsumi, Nakamura-Messenger, Keiko, Sasaki, Sho, Abe, Shinsuke, Urakawa, Seitaro, Yanagisawa, Toshifumi, Hiroi, Takahiro, Hirata, Naru, Demura, Hirohide, Komatsu, Goro, Inamori, Takaya, Yano, Hajime, Yoshikawa, Makoto, Okada, Tatsuaki, Iwata, Takahiro, Kawakatsu, Yasuhiro, Toyota, Hiroyuki, Nishiyama, Kazutaka, and Takashima, Takeshi

Abstract

第19回宇宙科学シンポジウム (2019年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 19th Space Science Symposium (January 9-10, 2019. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 42名, Number of authors: 42, 資料番号: SA6000144163, レポート番号: P-128

Published
2019

44. Web Processing Catalog : Web interface for distribution of the appropriate and advanced environment for the data processing: A case study for the data from the Spectral Profiler on board Japanese satellite Kaguya

Author

Hayashi, Yohei, Yamamoto, Yukio, Ogawa, Yoshiko, Hirata, Naru, Demura, Hirohide, Terazono, Junya, and Matsunaga, Tsuneo

Subjects
Metadata, Data Processing, Web Processing Catalog, Scientific Data, Kaguya (SELENE), Web Service, Spectral Profiler, GEKKO
Abstract

惑星科学の分野ではウェブ上のサービスを通じて科学データが利用可能である．科学データから情報を得るためには目的に応じてデータ処理がなされる必要があり， このデータ処理はサービス提供者あるいはユーザ自らが行う必要がある．前者の場合，データ処理のプロセスはブラックボックスになりがちであり，データが本来もつ可能性を発揮しきれない可能性がある．後者では， データの利用には多くの専門知識を必要とする場合があり利用が阻まれる場合もある．そこで上記の問題を解決するため，データとデータ処理プログラムを関連付ける重要性を明らかにする．そして，ユーザへ適切かつ高度なデータ処理環境を提供することを目指し, 両者を関連付けるメタデータおよびデータ処理プログラムを配信するウェブインターフェースを構築するためのプロトコル“Web Processing Catalog” を提案する．また， 実際の月探査衛星「かぐや」に搭載されたスペクトルプロファイラ（SP）のデータを用いた試験的なシステムの実装を行い検証をおこなう．, In the planetary science, many observation data are available via internet. To get some information from the observation data, a lot of steps of data processing are necessary. Either the data providers or users have to handle such processes. For the case where the providers are responsible, the data processing is a black box for the users usually, so the potential of the data could not be fully utilized. On the other hand, for the case the users themselves follow the processes, the data usability would be the problem, because the users need to know many technical things and they sometimes could not afford that. We focus on the importance of the relationship between the data and data processing. We propose a new protocol “Web Processing Catalog” for developing web interface to distributing the metadata and desirable programs for data processing. Finally, we also implement a preliminary system and conduct verification where we use the actual data from the spectral profiler onboard Japanese lunar orbiter, Kaguya., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1630012010, レポート番号: JAXA-RR-15-006

Published
2016

45. はやぶさ2着陸地点選定訓練：LIDARおよびTIR

Author

Okada, Tatsuaki, Fukuhara, Tetsuya, Tanaka, Satoshi, Taguchi, Makoto, Arai, Takehiko, Senshu, Hiroki, Demura, Hirohide, Ogawa, Yoshiko, Kouyama, Toru, Sekiguchi, Tomohiko, Sakatani, Naoya, Takita, Jun, Matsumoto, Koji, Yamamoto, Keiko, Noda, Hirotomo, Yamada, Ryuhei, Araki, Hiroshi, Mizuno, Takahide, Ogawa, Naoko, and Namiki, Noriyuki

Abstract

第18回宇宙科学シンポジウム (2018年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 18th Space Science Symposium (January 9-10, 2018. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 20名, 資料番号: SA6000118047, レポート番号: P-013

Published
2018

46. DESTINY+によるふたご座流星群母天体Phaethonフライバイと地球飛来ダストのその場分析

Author

Ralph, Srama, Harald, Kruger, Arai, Tomoko, Kobayashi, Masanori, Ishibashi, Ko, Kameda, Shingo, Wada, Koji, Senshu, Hiroki, Yamada, Manabu, Okudaira, Osamu, Fumi, Yoshida, Kimura, Hiroshi, Ishiguro, Masateru, Watanabe, Junnichi, Ito, Takashi, Ohtsuka, Katsuhito, Nakamura, Tomoki, Tachibana, Shogo, Mikouchi, Takashi, Yabuta, Hikaru, Komatsu, Mutsumi, Nakamura-Messenger, Keiko, Sasaki, Sho, Abe, Shinsuke, Urakawa, Seitaro, Noguchi, Takaaki, Hiroi, Takahiro, Hirata, Naru, Demura, Hirohide, Komatsu, Goro, Inamori, Takaya, Yoshikawa, Makoto, Yano, Hajime, Iwata, Takahiro, Okada, Tatsuaki, Kawakatsu, Yasuhiro, Toyota, Hiroyuki, Nishiyama, Kazutaka, and Takashima, Takeshi

Abstract

第18回宇宙科学シンポジウム (2018年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 18th Space Science Symposium (January 9-10, 2018. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 39名, 資料番号: SA6000118136, レポート番号: P-103

Published
2018

47. 火星表面での生命探査顕微鏡LDM: Life Detection Microscope 開発の現状

Author

Yamagishi, Akihiko, Yoshimura, Yoshitaka, Miyakawa, Atsuo, Imai, Eiichi, Satoh, Takehiko, Enya, Keigo, Sasaki, Satoshi, Naganuma, Takeshi, Kobayashi, Kensei, Kebukawa, Yoko, Yabuta, Hikaru, Mita, Hajime, Demura, Hirohide, Fujita, Kazuhisa, and Usui, Tomohiro

Abstract

第18回宇宙科学シンポジウム (2018年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 18th Space Science Symposium (January 9-10, 2018. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 15名, 資料番号: SA6000118106, レポート番号: P-073

Published
2018

48. Global classification of lunar reflectance spectra obtained by Kaguya (SELENE): Implication for hidden basaltic materials

Author

Hareyama, Makoto, primary, Ishihara, Yoshiaki, additional, Demura, Hirohide, additional, Hirata, Naru, additional, Honda, Chikatoshi, additional, Kamata, Shunichi, additional, Karouji, Yuzuru, additional, Kimura, Jun, additional, Morota, Tomokatsu, additional, Nagaoka, Hiroshi, additional, Nakamura, Ryousuke, additional, Yamamoto, Satoru, additional, Yokota, Yasuhiro, additional, and Ohtake, Makiko, additional

Published
2019
Full Text
View/download PDF

49. Web GIS system Gekko for data analysis of Kaguya's Spectral Profiler

Author

Hayashi, Yohei, Ogawa, Yoshiko, Hirata, Naru, Terazono, Junya, Demura, Hirohide, Matsunaga, Tsuneo, Yamamoto, Satoru, Yokota, Yasuhiro, Ohtake, Makiko, and Otake, Hisashi

Subjects
user interface, Kaguya mission, spectral data, Moon, GIS, Spectral Profiler
Abstract

我々は月周回衛星「かぐや」に搭載されたスペクトルプロファイラ（SP）によって観測されたハイパースペクトルバンドのスペクトルデータを閲覧するためのウェブGIS「月光」を開発した. 「月光」ではSP の観測点位置を月面の画像上にプロットして表示させている. 任意の観測点を選択することにより, 観測点のSP スペクトルデータを様々なグラフの形式で確認することができる. グラフで使用している数値データはダウンロードすることもできる. このシステムは, 主に林および会津大学のチームが開発した. システム内で使用しているSP データは, 宇宙航空研究開発機構および国立環境研究所のチームによってもたらされたデータを利用している. 本システムは将来的には科学コミュニティのための分析ツールとして発展させていきたい., We developed a web GIS system ”Gekko”. This paper mainly describes a web GIS system for viewing the hyperspectral data observed by Spectral Profiler (SP) onboard Kaguya, a Japanese lunar orbiter. Gekko means moon light in Japanese. Users can browse easily the observation points of SP on the lunar image, focusing on the interesting areas. Once an observation point is selected, then the spectral data are displayed in many graphs. The users can download the plotted SP data in the graphs, too. This system was developed by Hayashi and University of Aizu team. The SP data used in the system are provided by Japan Aerospace Exploration Agency and National Institute for Environmental Studies. Gekko will be extended beyond a viewing tool and develop into a new analysis tool which contributes to the science community., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1530026008, レポート番号: JAXA-RR-14-009

Published
2015

50. 火星表面探査のための生命探査顕微鏡（LDM）開発の現状

Author

Yamagishi, Akihiko, Satoh, Takehiko, Miyakawa, Atsuo, Yoshimura, Yoshitaka, Naganuma, Takeshi, Sasaki, Satoshi, Imai, Eiichi, Demura, Hirohide, Yabuta, Hikaru, Mita, Hajime, Kebukawa, Yoko, Kobayashi, Kensei, Enya, Keigo, Miyamoto, Hideaki, Ishigami, Genya, Fujita, Kazuhisa, and Usui, Tomohiro

Abstract

第50回月・惑星シンポジウム (2017年8月3-4日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)), 相模原市, 神奈川県, 50th ISAS Lunar and Planetary Symposium (August 3-4, 2017. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 著者人数: 17名, 資料番号: SA6000200012

Published
2017

Catalog

Books, media, physical & digital resources
See catalog results