Results 41 to 50 of about 223 (159)

Mastcam‐Z Spectrophotometric Properties of Materials at the Van Zyl Overlook, Jezero Crater

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract During Sols 63–65 of Mars 2020, Mastcam‐Z multispectral (442–1022 nm) images were acquired at Van Zyl Overlook (VZO), spanning phase angles from ∼0° to 150°, to model photometric parameters for seven surface units. These units included rocks, soils, regolith, and rover tracks near the Jezero landing site.
B. Margara, J. R. Johnson, A. G. Hayes, M. T. Lemmon, W. M. Grundy, J. F. Bell III, M. N. Barrington   +6 more
wiley   +1 more source

New High Precision Measurements of Apollo Samples: 0.3–5 GHz Complex Refractive Indices

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract Active and passive radar techniques provide information on the subsurface structure and history of planetary bodies. However, interpretations of radar data are limited by our understanding of the complex dielectric permittivity and magnetic permeability of the surface material.
P. Linton, R. Ghent, P. Gorham, P. Allison, J. J. Beatty, A. Connolly, E. S. Costello, P. Lucey, A. Jung, A. Machtay, K. McBride, C. Miki, E. Oberla, J. Rolla, A. Romero‐Wolf, C. J. Tai Udovicic   +15 more
wiley   +1 more source

Laboratory measurements show temperature-dependent permittivity of lunar regolith simulants

Earth, Planets and Space, 2023
The mapping of available water–ice is a crucial step in the lunar exploration missions. Ground penetrating radars have the potential to map the subsurface structure and the existence of water–ice in terms of the electromagnetic properties, specifically ...
M. Kobayashi, H. Miyamoto, B. D. Pál, T. Niihara, T. Takemura   +4 more
doaj   +1 more source

Superposition of Doppler‐Shifting Magnetopause Kelvin‐Helmholtz Modes Through Dynamic Mode Decomposition of a Global MHD Simulation

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The Kelvin‐Helmholtz instability (KHI) mediates the viscous‐like solar‐terrestrial interaction by generating magnetopause surface waves that quickly become non‐linear. Basic theory predicts the locally most‐unstable linear wave dominates.
H. M. Kelly, M. O. Archer, J. P. Eastwood, M. Heyns, J. W. B. Eggington, J. P. Chittenden   +5 more
wiley   +1 more source

Numerical Simulations of the Lunar Penetrating Radar and Investigations of the Geological Structures of the Lunar Regolith Layer at the Chang’E 3 Landing Site

International Journal of Antennas and Propagation, 2017
In the process of lunar exploration, and specifically when studying lunar surface structure and thickness, the established lunar regolith model is usually a uniform and ideal structural model, which is not well-suited to describe the real structure of ...
Chunyu Ding, Yan Su, Shuguo Xing, Shun Dai, Yuan Xiao, Jianqing Feng, Danqing Liu, Chunlai Li   +7 more
doaj   +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

Transport of Water in a Transient, Impact‐Generated Atmosphere on Mercury

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Mercury's polar cold traps host water ice deposits that are likely populated with impact‐delivered water via Mercury's exosphere. However, Mercury's near‐sun location experiences an extremely high photodestruction rate that rapidly destroys water with a timescale of only ∼3.5 hr.
J. K. Steckloff, D. B. Goldstein, P. L. Varghese, L. M. Trafton, P. Prem   +4 more
wiley   +1 more source

A Horizon Tracking Algorithm for Chang’E-4 Lunar Surface Penetrating Radar Based on Dynamic Search Center

Leida xuebao
The Moon’s shallow subsurface structure provides crucial insights into its geological evolution, material composition, and space weathering processes. With the acquisition of extensive radar datasets from recent lunar exploration programs, such as the ...
Yuxiao ZHI, Xiaohang QIU, Jiangwan XU, SHARMA Ravi, Zihang LIANG, Wentao CHEN, Changzhi JIANG, Chunyu DING   +7 more
doaj   +1 more source

Characterization of Mass Wasting Events on Lunar Maria Using Mini‐RF Radar Observations

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Evidence of mass wasting has been observed on the Moon since at least the Apollo era. Surface features indicative of mass wasting processes are traditionally characterized geomorphologically using visible images. In this study, we aim to better understand mass wasting features via their radar properties, which can provide insights into the ...
S. L. Pérez‐Cortés, A. M. Bramson, E. G. Rivera‐Valentín, C. A. Nypaver, G. W. Patterson, A. K. Virkki, P. A. Taylor, R. Melikyan   +7 more
wiley   +1 more source

Deciphering the “Missing Xenon Paradox” in Celestial Bodies: A Multifaceted Perspective Toward Demystifying This Enigma

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Xenon (Xe) is a heavy noble gas with intriguing chemical properties, such as having several stable isotopes and the ability to form compounds under extreme conditions. Despite the predictions based on cosmochemical models that suggest xenon should be relatively abundant in planetary reservoirs, empirical data indicate a significant depletion ...
Avinash Kumar Both, Avradip Ghosh, Chin Li Cheung   +2 more
wiley   +1 more source