Results 31 to 40 of about 811 (168)

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

Models of the distribution and abundance of hydrogen at the lunar south pole [PDF]

Geophysical Research Letters, 2007
Permanently shadowed locations at the lunar poles are potential sites for significant concentrations of cold‐trapped volatiles, including water ice. Hydrogen enhancements are seen at the poles, but the physical form, abundance and distribution of this hydrogen remains controversial.
R. C. Elphic, V. R. Eke, L. F. A. Teodoro, D. J. Lawrence, D. B. J. Bussey   +4 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

Control Network Construction for LRO NAC Images Based on Refining Tie Points by Matching With Shaded LOLA DEM

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The upcoming exploration activities in the lunar south pole require high-resolution mapping products to support landing site selection and navigation. The special terrain and illumination conditions in the lunar south pole pose significant challenges to ...
Sifen Wang, Xun Geng, Jiansheng Li, Tao Li, Junming Yu, Ancheng Wang, Jin Wang, Pengying Liu, Zhen Peng, Xin Ma, Yinhui Wang, Yuying Wang, Guohua Chang   +12 more
doaj   +1 more source

Illumination-Prior-Based High-Resolution DEM Reconstruction from Single-View Lunar Image Constrained with Initial DEM [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The lunar south pole is characterized by complex illumination conditions, extensive shadowed regions, and rugged topography, which make high-resolution terrain reconstruction from single-view imagery particularly challenging.
S. Qiu, Z. Ye, Z. Ye, R. Huang, R. Huang, Y. Xu, Y. Xu, X. Tong, X. Tong   +8 more
doaj   +1 more source

The Distribution of Molecular Water in the Lunar South Polar Region Based upon 6 μm Spectroscopic Imaging

The Planetary Science Journal, 2023
The amount and distribution of water on the lunar surface are related to the input and production of water by solar wind and meteoroid bombardment, balanced by photodestruction and mobility across the surface.
William T. Reach, Paul G. Lucey, Casey I. Honniball, Anicia Arredondo, Erick R. Malaret   +4 more
doaj   +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

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

A newly-identified spectral reflectance signature near the lunar South pole and the South Pole-Aitken Basin [PDF]

Earth, Planets and Space, 2008
Abstract Signal analysis of Galileo images of the Moon suggests the presence of an absorption band centered near 0.7 μm in the reflectance spectra of areas located adjacent to the equatorward walls of lunar craters at latitudes ranging from −58 to −78°, and areas contained in the South Pole-Aitken Basin.
Vilas, Faith, Jensen, Elizabeth A., Domingue, Deborah L., McFadden, Lucy A., Runyon, Cassandra J., Mendell, Wendell W.   +5 more
openaire   +1 more source

The Evolution of Autonomous Systems for Planetary Cave Exploration: A Review

Journal of Field Robotics, EarlyView.
ABSTRACT The exploration of Subsurface Access Points (SAPs), such as lava tubes on the Moon and Mars, has gained significant interest due to their potential as stable environments shielded from surface radiation and temperature extremes. These sites are considered high‐value targets for detecting water and signs of ancient life, and assessing their ...
Sarah Swinton, Daniel Mitchell, Jamie Blanche, Euan McGookin, David Flynn   +4 more
wiley   +1 more source