Results 51 to 60 of about 38,084 (153)

Automated Lunar Crater Detection with Edge-Based Feature Extraction and Robust Ellipse Refinement

open access: yesAerospace
Automated detection of impact craters is essential for planetary surface studies, yet it remains a challenging task due to variable morphology, degraded rims, complex geological settings, and inconsistent illumination conditions.
Ahmed Elaksher, Islam Omar, Fuad Ahmad
doaj   +1 more source

The self‐secondary crater population of the Hokusai crater on Mercury [PDF]

open access: yesGeophysical Research Letters, 2016
AbstractWhether or not self‐secondaries dominate small crater populations on continuous ejecta deposits and floors of fresh impact craters has long been a controversy. This issue potentially affects the age determination technique using crater statistics.
Xiao, Zhiyong   +2 more
openaire   +4 more sources

Bomb crater

open access: yes, 1943
Men from 1 Motor Ambulance Convoy in a bomb crater. L-R: Jack Egan; Phil Stewart; Farquhar McLean. Adelaide River 6 km along Mt.

core   +1 more source

Volcanic History and Eruption Processes of Blue Lake Crater, Tongariro [PDF]

open access: yes, 2014
Blue Lake Crater (BLC) is a volcanic crater lake situated on the northern end of the Tongariro Volcanic Centre (TgVC) and is one of at least 11 vents that have been active since c. 25 ka.
Simons, Benjamin Clifford
core  

Erosion rate and previous extent of interior layered deposits on Mars revealed by obstructed landslides [PDF]

open access: yes, 2014
We describe interior layered deposits on Mars that have obstructed landslides before undergoing retreat by as much as 2 km. These landslides differ from typical Martian examples in that their toe height increases by as much as 500 m in a distinctive ...
Warner, N.H., Grindrod, Peter M.
core   +1 more source

Crater Within Crater: Double Coloboma

open access: yesAsia-Pacific Journal of Ophthalmology, 2022
Aarush, Deora   +2 more
openaire   +2 more sources

Robust Feature Matching of Multi-Illumination Lunar Orbiter Images Based on Crater Neighborhood Structure

open access: yesRemote Sensing
Lunar orbiter image matching is a critical process for achieving high-precision lunar mapping, positioning, and navigation. However, with the Moon’s weak-texture surface and rugged terrain, lunar orbiter images generally suffer from inconsistent lighting
Bin Xie   +6 more
doaj   +1 more source

Products and Processes of Cone-Building Eruptions at North Crater, Tongariro [PDF]

open access: yes, 2007
North Crater occupies the north-western quadrant of the Tongariro Volcanic Centre and represents one of at least eleven vents which have been active on Tongariro since the last glacial maximum.
Griffin, Anna Marie
core  

spherical crater

open access: yes, 2018
spherical ...
Almog Yalinewich (4635409)
core   +1 more source

Formation of Craters in Sand

open access: yesInternational Scholastic Journal of Science, 2007
The diameter of craters formed by spheres of varying mass dropped into sand at low speed was studied. The relationship between the diameter of the crater formed and the kinetic energy of the projectile at impact was found to be of the same general form ...
Vanissra Boonyaleepun, Se-Won Jang
doaj  

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