Photometric characterization of the Chang’e-3 landing site using LROC NAC images

Clegg-Watkins, R. N.; Jolliff, B. L.; Boyd, A. K.; Robinson, M. S.; Wagner, R. V.; Stopar, J. D.; Plescia, J. B.; Speyerer, E. J.

doi:10.1016/j.icarus.2015.12.010

Cited by 32 publications

(39 citation statements)

References 42 publications

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“…Images from the LROC NAC taken after the landing revealed an area of increased reflectance interpreted as modification caused by rocket exhaust (Figure b) [ Clegg‐Watkins et al ., ]. Clegg‐Watkins et al [] performed a study of the CE‐3 landing site using LROC NAC images and found an increase in reflectance of ~10% within the blast zone relative to the background, similar to that at Apollo, Luna, and Surveyor landing sites. They reported changes in photometric behavior at the CE‐3 site consistent with decreased backscattering and smoothing of the surface.…”

Section: Datamentioning

confidence: 93%

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Submicroscopic metallic iron in lunar soils estimated from the in situ spectra of the Chang'E‐3 mission

Wang

Blewett

et al. 2017

Geophysical Research Letters

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Submicroscopic metallic iron (SMFe) created by space weathering has strong effects on the optical properties of the lunar surface. Spectra measured in situ by the visible‐near‐infrared spectrometer (VNIS) on board the Chang'E‐3 Yutu rover were used to investigate optical maturity differences at the CE‐3 landing site caused by lander exhaust. SMFe abundances were estimated using Hapke's radiative transfer model. Analysis of the spectrum for a minimally disturbed soil indicates that it contains 0.368 wt % SMFe, corresponding to an Is/FeO maturity index of ~53 and indicating that the landing site is submature. The soil at a location that was more disturbed contains 0.217 wt % SMFe, suggesting that the material removed by the rocket blast is more weathered than the regolith that remained behind. We conclude that maturity differences related to removal of the finest, highly mature particles play a major role in the observed reflectance changes associated with rocket blast.

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Section: Datamentioning

confidence: 93%

“…The locations of the four VNIS measurements (5 to 8) are shown. White dashed line outlines the blast zone; black dotted line highlights the rover tracks [ Clegg‐Watkins et al, ].…”

Section: Introductionmentioning

confidence: 99%

Submicroscopic metallic iron in lunar soils estimated from the in situ spectra of the Chang'E‐3 mission

Wang

Blewett

et al. 2017

Geophysical Research Letters

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“…For more on the detailed physics and effects of plume effects during descent, we refer the reader to Lane et al (), Metzger et al (, ), Immer et al (), Immer et al (), Lane and Metzger (), Kaydash et al (), Clegg et al (), and Clegg‐Watkins et al ().…”

Section: Enhancing Technologiesmentioning

confidence: 99%

“…Using Lunar Reconnaissance Orbiter Camera narrow angle camera (LROC NAC) images to measure the extent of each blast zone, Clegg‐Watkins et al () found a consistent correlation between blast zone area and lander dry mass (Figure ), despite variations in descent trajectories, maneuvering, engine configuration, and spacecraft design. This relationship will serve as an important tool in predicting the scale of rocket exhaust effects for future landed missions.…”

Section: Enhancing Technologiesmentioning

confidence: 99%

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Lunar Science for Landed Missions Workshop Findings Report

Jawin

Valencia

Clegg-Watkins

et al. 2019

Earth and Space Science

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The Lunar Science for Landed Missions workshop was convened at the National Aeronautics and Space Administration Ames Research Center on 10–12 January, 2018. Interest in the workshop was broad, with 110 people participating in person and 70 people joining online. In addition, the workshop website (https://lunar-landing.arc.nasa.gov) includes video recordings of many of the presentations. This workshop defined a set of targets that near‐term landed missions could visit for scientific exploration. The scope of such missions was aimed primarily, but not exclusively, at commercial exploration companies with interests in pursuing ventures on the surface of the Moon. Contributed and invited talks were presented that detailed many high priority landing site options across the surface of the Moon that would meet scientific goals in a wide variety of areas, including impact cratering processes and dating, volatiles, volcanism, magnetism, geophysics, and astrophysics. Representatives from the Japan Aerospace Exploration Agency and the European Space Agency also presented about international plans for lunar exploration and science. This report summarizes the set of landing sites and/or investigations that were presented at the workshop that would address high priority science and exploration questions. In addition to landing site discussions, technology developments were also specified that were considered as enhancing to the types of investigations presented. It is evident that the Moon is rich in scientific exploration targets that will inform us on the origin and evolution of the Earth‐Moon system and the history of the inner Solar System, and also has enormous potential for enabling human exploration and for the development of a vibrant lunar commercial sector.

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Geotechnical Properties of Asteroids Affecting Surface Operations, Mining, and In Situ Resource Utilization Activities

Zacny

Bierhaus

Britt

et al. 2018

Primitive Meteorites and Asteroids

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Photometric characterization of the Chang’e-3 landing site using LROC NAC images

Cited by 32 publications

References 42 publications

Submicroscopic metallic iron in lunar soils estimated from the in situ spectra of the Chang'E‐3 mission

Submicroscopic metallic iron in lunar soils estimated from the in situ spectra of the Chang'E‐3 mission

Lunar Science for Landed Missions Workshop Findings Report

Geotechnical Properties of Asteroids Affecting Surface Operations, Mining, and In Situ Resource Utilization Activities

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