Occurrence probability of slopes on the lunar surface: Estimate by the shaded area percentage in the LROC NAC images

Abdrakhimov, A. M.; Basilevsky, A. T.; Иванов, М. А.; Kokhanov, A. A.; Karachevtseva, I. P.; Head, J. W.

doi:10.1134/s0038094615050019

Cited by 10 publications

(4 citation statements)

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“…The largest concentration of critical inclinations (>10°) is observed in ellipses 7, 10, and 11, while the plain topography, in ellipses 2, 3, and 5. To determine the inclinations at the base of a lander footpad span of ~3.5 m, additional studies are required based on determining the share of the shaded surface area in the NAC images with respect to the solar elevation (Abdrakhimov et al, 2015). This method was used for determining the inclinations at the base of the lander module in the primary (1, 4, and 6) and secondary (B-1, -2) landing ellipses in (Krasilnikov et al, 2018).…”

Section: Surface Inclinations In the Landing Ellipsesmentioning

confidence: 99%

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Geological and Geomorphological Characteristics of High-Priority Landing Sites for the Luna-Glob Mission

et al. 2021

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The geomorphological and geological analysis of the surface of three primary and ten secondary landing ellipses (15 × 30 km) for the Russian Luna-Glob automated scientific station (Luna-25) is presented. The earlier selected landing ellipses are found in the sector of 65°–85° S and 0°–60° E of the lunar southern hemisphere. The geological characteristics of the ellipse include the analysis of the surface age and the identification of the material sources. The analyses of water equivalent hydrogen concentration in the sector of landing and rock content on the surface are also carried out. The constraints, such as the surface inclination and the characteristic of the spacecraft’s flight path are used for prioritization of the ellipses from an engineering-technical perspective. According to the results of the study, landing ellipses 1, 3, 4, 6 and 8 are determined as high-priority, while ellipses 5, 7, 9, 10, 11, as well as B1 and B2 are found the least favorable.

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Section: Surface Inclinations In the Landing Ellipsesmentioning

confidence: 99%

“…Distribution of the inclinations by the categories for primary and secondary landing ellipses. A share of the inclinations according to the LROC NAC data was calculated only for ellipses 1, 4, 6 and B1, B2 inKrasilnikov et al (2018) andAbdrakhimov et al (2015), respectively…”

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confidence: 99%

Geological and Geomorphological Characteristics of High-Priority Landing Sites for the Luna-Glob Mission

et al. 2021

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“…LRO is an exploration mission with a primary goal of identifying desirable safe landing sites on the Moon. The LRO NAC images provide information on the distribution of craters and slopes over small baselines, with the technique of shadowed‐area analysis (Abdrakhimov et al, ). Here we selected 27 single NAC images to cover the CE‐4 preselected landing area.…”

Section: Nac Image Segmentation Using a Double‐threshold Otsu Methodsmentioning

confidence: 99%

High‐Resolution Terrain Analysis for Lander Safety Landing and Rover Path Planning Based on Lunar Reconnaissance Orbiter Narrow Angle Camera Images: A Case Study of China's Chang'e‐4 Probe

Yue

Zhang

et al. 2019

Earth and Space Science

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China's Chang'e‐4 (CE‐4) probe will explore the South Pole‐Aitken basin in late 2018. Its preselected landing area is located on the southeastern floor of the Von Kármán crater. Landing experience of China's Chang'e‐3 probe may not be applied to CE‐4 mission directly because the topography of lunar farside is more rugged. Moreover, due to scale dependence and smooth effects, the previous topographic studies derived from digital elevation model data with lower resolution cannot represent the meter‐scale topographic features. Because of low time and space complexities in lunar images, image segmentation algorithm is especially suitable for recognizing lunar features. We divided the narrow angle camera (NAC) mosaic image into three parts: dark area, bright area, and flat area, based on a double‐threshold Otsu method. The first two parts corresponded to the undulating areas (positive and negative terrains). And then we calculated the flat area percentage (Fap) of the previous successful lunar landing missions (including Chang'e‐3, Apollo, Surveyor, and Luna series) and obtained the Fap threshold (>0.6) for lunar safe landing. According to Fap map (~1.5 m per pixel) of CE‐4 preselected landing area, the divided square grids with a size of 0.01° can be classified into safe grids (Fap > 0.6) and unsafe grids (Fap ≤ 0.6). The CE‐4 preselected landing areas can be greatly reduced to five potential landing areas. In the last, we proposed a route planning method, which took both the distance and security into account, for CE‐4 rover to dynamically generate a safe and short route between current grid and target grid.

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“…However, for the lunar polar regions these direct measurements are not possible, because the sun is always very low, and many steep slopes are hidden in shadows. Comparing modeled slopes and shadows based on LRO NAC DEM for Lunokhod's area the estimation of slope in the Moon sub-polar area that planning as landing site for future Russian lunar mission has been done (Abdrakhimov et al, 2015).…”

Section: The Moonmentioning

confidence: 99%

Mapping of Inner and Outer Celestial Bodies Using New Global and Local Topographic Data Derived From Photogrammetric Image Processing

Karachevtseva¹,

Kokhanov²,

Rodionova³

et al. 2016

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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New estimation of fundamental geodetic parameters and global and local topography of planets and satellites provide basic coordinate systems for mapping as well as opportunities for studies of processes on their surfaces. The main targets of our study are Europa, Ganymede, Calisto and Io (satellites of Jupiter), Enceladus (a satellite of Saturn), terrestrial planetary bodies, including Mercury, the Moon and Phobos, one of the Martian satellites. In particular, based on new global shape models derived from three-dimensional control point networks and processing of high-resolution stereo images, we have carried out studies of topography and morphology. As a visual representation of the results, various planetary maps with different scale and thematic direction were created. For example, for Phobos we have produced a new atlas with 43 maps, as well as various wall maps (different from the maps in the atlas by their format and design): basemap, topography and geomorphological maps. In addition, we compiled geomorphologic maps of Ganymede on local level, and a global hypsometric Enceladus map. Mercury's topography was represented as a hypsometric globe for the first time. Mapping of the Moon was carried out using new images with super resolution (0.5-1 m/pixel) for activity regions of the first Soviet planetary rovers (Lunokhod-1 and -2). New results of planetary mapping have been demonstrated to the scientific community at planetary map exhibitions (Planetary Maps Exhibitions, 2015), organized by MExLab team in frame of the International Map Year, which is celebrated in 2015-2016. Cartographic products have multipurpose applications: for example, the Mercury globe is popular for teaching and public outreach, the maps like those for the Moon and Phobos provide cartographic support for Solar system exploration.

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Occurrence probability of slopes on the lunar surface: Estimate by the shaded area percentage in the LROC NAC images

Cited by 10 publications

References 2 publications

Geological and Geomorphological Characteristics of High-Priority Landing Sites for the Luna-Glob Mission

Geological and Geomorphological Characteristics of High-Priority Landing Sites for the Luna-Glob Mission

High‐Resolution Terrain Analysis for Lander Safety Landing and Rover Path Planning Based on Lunar Reconnaissance Orbiter Narrow Angle Camera Images: A Case Study of China's Chang'e‐4 Probe

Mapping of Inner and Outer Celestial Bodies Using New Global and Local Topographic Data Derived From Photogrammetric Image Processing

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