Results 81 to 90 of about 30,578 (233)

Preliminary Investigation of the Ground-Water Resources of Baxter, Fulton, Izard and Sharp Counties, Arkansas [PDF]

, 1980
One hundred and seventy-seven drillers\u27 well reports were used to investigate the groundwater resources of Baxter, Fulton, Izard, and Sharp counties. The most widely utilized aquifer zone is composed of the Cotter and Jefferson City dolomites.
Liebelt, Mike, Lundy, Gerald, Ogden, Albert E.   +2 more
core   +2 more sources

Real‐Time Terrain Traversability Analysis and Mapping for Autonomous Robotics in Dynamic Environments: Fusing Appearance‐ and Geometry‐Based Approaches

Journal of Field Robotics, Volume 43, Issue 3, Page 1719-1738, May 2026.
ABSTRACT This paper presents advanced methodologies for real‐time terrain analysis and mapping in autonomous robotic systems. The focus is on appearance‐based terrain traversability analysis and geometric‐based terrain traceability analysis. In the appearance‐based approach, an enhanced segmentation model using pixel‐based augmentation and 13 unique ...
Semih Beycimen, Dmitry Ignatyev, Argyrios Zolotas   +2 more
wiley   +1 more source

Analysis of lunar regolith thermal energy storage [PDF]

The concept of using lunar regolith as a thermal energy storage medium was evaluated. The concept was examined by mathematically modeling the absorption and transfer of heat by the lunar regolith. Regolith thermal and physical properties were established
Colozza, Anthony J.
core   +1 more source

Terrain Classification for Planetary Rovers Using Wireless In‐Wheel Sensor Modules and Machine Learning

Journal of Field Robotics, Volume 43, Issue 3, Page 1884-1904, May 2026.
ABSTRACT Safe and reliable mobility over different kinds of ground is important for planetary rovers on space missions. Since terrain changes might affect the mobility of the rover, energy consumption, and safety, detecting the type of ground in real‐time is vital.
Md Masrul Khan, Sultan Shaharea, Manseeb M. Mannaf, Shihab Ahemed, Fahim Islam Anik, Md Jarir Hossain, Helal An Nahiyan, Sourav Karmaker   +7 more
wiley   +1 more source

Photometry of Lunar Swirls in Comparison to Fresh Crater Ejecta

The Planetary Science Journal
Swirls are sinuous high-reflectance lunar surface features collocated with crustal magnetic anomalies. These bright features and their geographical relationship to magnetic anomalies have been studied for decades, although their cause remains unclear ...
Mallory J. Kinczyk, Brett W. Denevi, Hiroyuki Sato, Aaron K. Boyd, Anna C. Martin, Emerson J. Speyerer, Bruce W. Hapke   +6 more
doaj   +1 more source

Dynamics of regolith dunes on small planetary bodies [PDF]

EPJ Web of Conferences
The surfaces of small planetary bodies are covered with regolith which keeps evolving with time. Studying the dynamics of these regolith can explain various surface features observed in recent space explorations.
Gaurav Kumar, Sharma Ishan, Banik Deepayan   +2 more
doaj   +1 more source

Chemical composition of crystalline rock fragments from Luna 16 and Luna 20 fines [PDF]

The chemical composition (bulk, rare earth, and trace elements) of the Luna 16 mare regolith and luna 20 highland regolith is discussed. The rock samples considered are 14 basaltic rock fragments (Luna 16) and 13 rock fragments of the ANT suite (Luna 20).
Cimbalnikova, A., Frana, J., Mastalka, A., Palivcova, M.   +3 more
core   +1 more source

The Ginger-shaped Asteroid 4179 Toutatis: New Observations from a Successful Flyby of Chang'e-2

, 2013
On 13 December 2012, Chang'e-2 conducted a successful flyby of the near-Earth asteroid 4179 Toutatis at a closest distance of 770 $\pm$ 120 meters from the asteroid's surface.
Bai, Jinming, Hu, Shoucun, Huang, Changning, Huang, Hao, Huang, Jiangchuan, Ip, Wing-Huen, Ji, Jianghui, Jiang, Xiaojun, Jiang, Yun, Li, Chunlai, Li, Jianyang, Li, Sheng, Li, Yuan, Liu, Peng, Meng, Linzhi, Qiao, Dong, Rao, Wei, Tang, Xianglong, Wang, Su, Wang, Xiaolei, Yan, Jun, Ye, Peijian, Yu, Liangliang, Zhang, Tingxin, Zhao, Haibin, Zhao, Wei, Zhao, Yuhui, Zhu, Menghua, Zou, Yongliao   +28 more
core   +1 more source

Calibration and Performance of the High Resolution Volatiles and Minerals Moon Mapper (HVM3) on Lunar Trailblazer

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract This article reports on the initial calibration and performance of the High‐resolution Volatiles and Minerals Moon Mapper (HVM3 ${\mathrm{H}\mathrm{V}\mathrm{M}}^{3}$), slated for launch on the National Aeronautics and Space Administration's Lunar Trailblazer mission.
David R. Thompson, Bethany L. Ehlmann, Robert O. Green, Gregory D. Allen, Holly Bender, Djuna Copley‐Woods, Michael Eastwood, Mark Helmlinger, Christopher Hummel, Jared Keller, Andrew Klesh, Ian McKinley, Bradley D. Moore, Pantazis Mouroulis, Shriya Nadgauda, Michael Sondheim, Jose Rodriguez, Charles Sarture, Calina Seybold, Vritika Singh, Christopher Smith, Peter Sullivan, Quentin Vinckier, Walton Williamson, Shannon Kian G. Zareh, Neil Bowles, Angela M. Dapremont, Kerri L. Donaldson Hanna, Christopher S. Edwards, Emily Felder, Elise Furlan, Garni Gharibian, Christopher Haberle, Martha House, Rachel L. Klima, Jasper Miura, Carle Pieters, Elena Scire, Kierra Wilk   +38 more
wiley   +1 more source

Mid‐Infrared Compositional Spectral Parameters for the Lunar Thermal Mapper Instrument Onboard Lunar Trailblazer

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract The Lunar Trailblazer mission launched in February of 2025 with the goal of characterizing lunar surface water through a targeted campaign. One instrument on the mission, the Lunar Thermal Mapper (LTM), was tasked with measuring the surface temperature to compare with maps of the form and abundance of water on the lunar surface.
Katherine A. Shirley, Kerri L. Donaldson Hanna, Neil E. Bowles, Namrah Habib, Nicholas Elkington, Rory Evans, Christopher S. Edwards, Tristram Warren, Fiona Henderson, Christopher Haberle, Rachel L. Klima, Bethany L. Ehlmann   +11 more
wiley   +1 more source