Results 41 to 50 of about 3,658,224 (185)

Image-Based Lunar Hazard Detection in Low Illumination Simulated Conditions via Vision Transformers

Sensors, 2023
Hazard detection is fundamental for a safe lunar landing. State-of-the-art autonomous lunar hazard detection relies on 2D image-based and 3D Lidar systems. The lunar south pole is challenging for vision-based methods.
Luca Ghilardi, Roberto Furfaro
doaj   +1 more source

Design of optimal Earth pole-sitter transfers using low thrust propulsion [PDF]

, 2011
Recent studies have shown the feasibility of an Earth pole-sitter mission using low-thrust propulsion. This mission concept involves a spacecraft following the Earth's polar axis to have a continuous, hemispherical view of one of the Earth's poles.
Biggs, James, Biggs, J.D., BIGGS, JAMES DOUGLAS, Heiligers, Jeannette, McInnes, Colin, Ceriotti, Matteo, Heiligers, J., Ceriotti, M., Mcinnes, Colin R., McInnes, C.R.   +9 more
core   +4 more sources

A NEW REALIZATION OF THE GLOBAL LUNAR REFERENCE FRAME BASED ON CO-REGISTERED LOLA TRACKS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
We present a method that aligns lunar south and north pole LOLA DTMs using selected LOLA tracks and co-registration techniques. The selected LOLA tracks were then co-registered to the aligned polar DTMs with the aim to create a new LOLA frame of high ...
P. Gläser, P. Gläser, I. Haase, J. Oberst, J. Oberst   +4 more
doaj   +1 more source

Lunar south pole ice as heat sink for lunar cryofuel production system [PDF]

AIP Conference Proceedings, 1995
Recent Clementine bistatic radar data suggest that water ice may be present in a {open_quotes}forever shaded{close_quotes} depression or crater at the South Pole of the Moon. The ice is a feedstock for the electrolysis production of cryogenic oxygen and hydrogen rocket fuels for a transportation system on the moon and for leaving and descending on to ...
Zuppero, A., Stanley, M., Modro, S. M., Whitman, P.   +3 more
openaire   +1 more source

Multibody Orbit Architectures for Lunar South Pole Coverage [PDF]

Journal of Spacecraft and Rockets, 2008
A potential ground station at the lunar south pole has prompted studies of orbit architectures that ensure adequate coverage. Constant communications can be achieved with two spacecraft in different combinations of Earth-Moon libration point orbits. Halo and vertical families, as well as other orbits near L1 and L2 are considered.
Daniel J. Grebow, Martin T. Ozimek, Kathleen C. Howell, David C. Folta   +3 more
openaire   +1 more source

AI-Driven Dim-Light Adaptive Camera (DimCam) for Lunar Robots [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The past decade has been a boom in lunar exploration. China, India, Japan and other countries have successfully landed landers or rovers on the lunar surface (Wu et al., 2014, 2018, 2020; Prasad et al., 2023).
R. Duan, B. Wu, L. Chen, H. Zhou, Q. Fan
doaj   +1 more source

A 3D‐Printed SFE‐Graded Alloy Mitigates Cryogenic Discontinuous Plastic Flow and Hydrogen Embrittlement

Advanced Science, EarlyView.
A novel strategy features gradient composition and stacking fault energy‐tuned (CoCrMn)100‐2xFexNix fabricated via in situ alloying additive manufacturing. This design circumvents cryogenic discontinuous plastic flow and hydrogen embrittlement of metallic materials under quasi‐static loading and hydrogen‐rich environment relevant to lunar polar ...
Renhao Wu, Ao Geng, Peihao Geng, Hyojin Park, Eun Seong Kim, Sang‐Ho Oh, Stephan Schönecker, Xiaoqing Li, Tianlong Zhang, Shuhui Li, Byeong‐Joo Lee, Hyoung Seop Kim   +11 more
wiley   +1 more source

Water Electrolysis Technologies for Extraterrestrial Water Resource Conversion

EcoEnergy, EarlyView.
This paper reviews four water electrolysis technologies for extraterrestrial water conversion: alkaline water electrolysis, proton exchange membrane water electrolysis, solid oxide water electrolysis, and anion exchange membrane water electrolysis. It elaborates on their mechanisms, components, and integration, highlighting challenges such as water ...
Yawen Jiang, Yuan Zhao, Lin Zu, Lili Ling, Yongwei Zhao, Jun Di, Pin Song   +6 more
wiley   +1 more source

An Open Database of Lunar Regolith and Simulants Properties

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Lunar regolith, the layer of unconsolidated material covering the Moon's surface, is central to the science and technology developed for the Moon, notably related to in‐situ science investigations, resource utilization, surface infrastructure, and mobility systems.
Léonie Gasteiner, Naomi Murdoch, Olfa D'Angelo   +2 more
wiley   +1 more source

Interplanetary frontiers: terraforming from an invasion science perspective

Oikos, EarlyView.
The pursuit of a multi‐planetary existence represents one of humanity's greatest frontiers. If applied justly, it offers an opportunity to extend its civilization's lifespan amid escalating sustainability crises on Earth. One approach increasingly gaining traction is terraforming, a hitherto theoretical ecological and evolutionary experiment revolving ...
Teun Everts, Ronaldo Sousa, Phillip J. Haubrock   +2 more
wiley   +1 more source