Results 21 to 30 of about 135,313 (308)

3D Discrete element method modeling of the cone penetration test in lunar regolith simulant with various internal friction angles

Geo-spatial Information Science
The mechanical behavior of lunar regolith is highly influenced by its diverse mechanical properties, which are critical for geotechnical engineering activities during lunar exploration missions.
Siji Sanlang, Chao Wang, Xiaohua Tong, Huan Xie, Yongjiu Feng, Jia Li, Mingjing Jiang, Xiong Xu, Yanmin Jin   +8 more
doaj   +1 more source

A Femto-Satellite Localization Method Based on TDOA and AOA Using Two CubeSats

Remote Sensing, 2022
This article presents a feasibility analysis to remotely estimate the geo-location of a femto-satellite only using two station-CubeSats and the communication link between the femto-satellite and each CubeSat.
Matías G. Vidal-Valladares, Marcos A. Díaz   +1 more
doaj   +1 more source

Planetary Cave Exploration Progresses

Eos, 2020
Terrestrial caves offer scientific and engineering insights and serve as testing grounds for future forays by humans and robots into caves on other worlds.
Timothy Titus, Charity Phillips-Lander, Penelope Boston, J. Wynne, Laura Kerber   +4 more
openaire   +2 more sources

Particle size distributions inside and around the artificial crater produced by the Hayabusa2 impact experiment on Ryugu

Earth, Planets and Space, 2022
Japanese Hayabusa2 spacecraft has successfully carried out an impact experiment using a small carry-on impactor (SCI) on an asteroid (162173) Ryugu. We examine the size distribution of particles inside and outside an artificial impact crater (the SCI ...
K. Ogawa, N. Sakatani, T. Kadono, M. Arakawa, R. Honda, K. Wada, K. Shirai, Y. Shimaki, K. Ishibashi, Y. Yokota, T. Saiki, H. Imamura, Y. Tsuda, S. Nakazawa, Y. Takagi, M. Hayakawa, H. Yano, C. Okamoto, Y. Iijima, T. Morota, S. Kameda, E. Tatsumi, Y. Cho, K. Yoshioka, H. Sawada, M. Matsuoka, M. Yamada, T. Kouyama, H. Suzuki, C. Honda, S. Sugita   +30 more
doaj   +1 more source

Model Predictive Control of a Novel Wheeled–Legged Planetary Rover for Trajectory Tracking

Sensors, 2022
Amid increasing demands for planetary exploration, wide-range autonomous exploration is still a great challenge for existing planetary rovers, which calls for new planetary rovers with novel locomotive mechanisms and corresponding control strategies ...
Jun He, Yanlong Sun, Limin Yang, Feng Gao   +3 more
doaj   +1 more source

Powder Optimization Strategies for Binder Jetting Printing of BaTiO3 and Ba0,6Sr0,4TiO3 Ceramics

Advanced Engineering Materials, EarlyView.
Powder optimization is investigated to enable binder jetting of BaTiO3 and Ba0.6Sr0.4TiO3 ferroelectric ceramics. The antagonistic relationship between flowability and binder compatibility is addressed through binder impregnation of granulated powders and fumed silica addition to fine powders.
Fanny Pruvost, Lionel Presmanes, Soléna Colin, Marie Vidal, Sophie Guillemet‐Fritsch   +4 more
wiley   +1 more source

Retrieving water ice abundance in representative regions of the Moon’s South Pole using topography corrected SELENE MI images

Geoscience Letters
Previous studies have reported the existence of water ice in the lunar polar regions, but estimations of water ice using different methods vary in certainty, precision, location, and abundance.
Xindi Long, Chao Wang, Siji Sanlang, Yongjiu Feng, Xiong Xu, Huan Xie, Xiaohua Tong   +6 more
doaj   +1 more source

Cross-section extraction and model reconstruction of lava tube based on L1-medial skeleton

International Journal of Applied Earth Observations and Geoinformation
Lunar lava tube caves, due to their unique geographical structure and potential as shelters, have repeatedly emerged as prime candidates or priority areas during discussions on lunar base site selection.
Qiao Yang, Zhizhong Kang, Teng Hu, Zhen Cao, Chenming Ye, Dongming Liu, Haoxiang Hu, Shuai Shao   +7 more
doaj   +1 more source

A Combined Deconvolution and Gaussian Decomposition Approach for Overlapped Peak Position Extraction From Large-Footprint Satellite Laser Altimeter Waveforms

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
In satellite laser altimetry, it is a challenging task to accurately extract peak positions from full waveforms due to the overlapped or weak peaks within the large laser footprints, which substantially affects the subsequent applications.
Zhijie Zhang, Huan Xie, Xiaohua Tong, Hanwei Zhang, Hong Tang, Binbin Li, Di Wu, Xiaolong Hao, Shijie Liu, Xiong Xu, Sicong Liu, Peng Chen, Yongjiu Feng, Chao Wang, Yanmin Jin   +14 more
doaj   +1 more source

Planetary protection: an international concern and responsibility

Frontiers in Astronomy and Space Sciences, 2023
Planetary protection is a set of measures agreed upon at an international level to ensure the protection of scientific investigation during space exploration.
Athena Coustenis, Niklas Hedman, Peter T. Doran, Omar Al Shehhi, Eleonora Ammannito, Masaki Fujimoto, Olivier Grasset, Frank Groen, Alexander G. Hayes, Vyacheslav Ilyin, K. Praveen Kumar, Caroline-Emmanuelle Morisset, Christian Mustin, Karen Olsson-Francis, Jing Peng, Olga Prieto-Ballesteros, Francois Raulin, Petra Rettberg, Silvio Sinibaldi, Yohey Suzuki, Kanyan Xu, Maxim Zaitsev   +21 more
doaj   +1 more source