Opposition effect of the Moon from LROC WAC data

Velikodsky, Yu. I.; Korokhin, V. V.; Shkuratov, Yu. G.; Kaydash, V. G.; Videen, Gorden

doi:10.1016/j.icarus.2016.04.005

Cited by 19 publications

(5 citation statements)

References 37 publications

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“…Many photometric models have been used to characterize the lunar surface (e.g., McEwen 1996;Muinonen et al 2011;Shkuratov et al 2011;Sato et al 2014;Jin et al 2015;Velikodsky et al 2016). In this study, we applied the Hapke model (Hapke 1981(Hapke , 1984(Hapke , 1986(Hapke , 1993(Hapke , 2002(Hapke , 2008(Hapke , 2012, which is based on geometric optics and the equations of radiative transfer.…”

Section: Modeling Methodologymentioning

confidence: 99%

Spectrophotometric and Topographic Correlations within the Mare Ingenii Swirl Region: Evidence for a Highly Mobile Lunar Regolith

Domingue,

Weirich,

Chuang

et al. 2023

Planet. Sci. J.

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The spectrophotometric properties of two study areas in the Ingenii swirl region show that the combined effects of multiple processes are required to explain the regolith’s mineralogical and physical properties. Production of the swirl regions requires mobilization of the regolith in addition to preferential radiation shielding of subareas. The discovery of topographic correlations between on- and off-swirl (dark lanes) clearly shows that the on-swirl regions are statistically lower than the off-swirl dark lanes by 2–3 m. Photometric analyses show no microscale roughness differences between on- and off-swirl, suggesting no differences in the regolith’s fairy-castle structure between the two swirl regions. The photometric properties of one of the study areas suggest that off-swirl dark lanes may have a more complicated grain structure than on-swirl areas. Enhanced abundances of plagioclase are observed on-swirl in both study areas. Enhanced abundances of FeO and orthopyroxene are observed off-swirl in both areas. No variations in olivine or clinopyroxene abundance were observed for either study area. The discovery of topographic correlations coupled with the similarities in structural properties provides new constraints on the types of processes acting on lunar swirl surfaces.

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Section: Modeling Methodologymentioning

confidence: 99%

Spectrophotometric and Topographic Correlations within the Mare Ingenii Swirl Region: Evidence for a Highly Mobile Lunar Regolith

Domingue,

Weirich,

Chuang

et al. 2023

Planet. Sci. J.

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“…From the Earth, the study of the opposition effect is limited by onset of lunar eclipse near 1.6 deg but lunar orbiters can measure this to 0 deg. Using lunar reconnaissance orbiter data in a study of small phase angles, Velikodsky et al 17 found that the width of the coherent-backscattering opposition effect ranges from 1.2 deg to 3.9 deg, dependent on wavelength and surface type. Thus, phase angle < ∼4 deg remains a region to be avoided for calibration.…”

Section: Radiometric Nature Of the Moonmentioning

confidence: 99%

Multiple-instrument-based spectral irradiance of the Moon

Kieffer¹

2022

J. Appl. Rem. Sens.

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A model of lunar spectral irradiance incorporates data from multiple spacecraft and surface telescopic observations. Using 12 data sources derived from 90,000 lunar images, models that are smooth across both geometry and wavelength and involve only about 35 derived coefficients are found with a mean weighted residual of <0.5%. An irradiance libration model derived from lunar orbiter observations is used to reduce the number of coefficients required. Derivation uses iterative assignment of a single scaling factor for each band in each instrument, which is effectively the long-term lunar calibration coefficient for that band. Calibration of 26 instruments and two other published models reveals that although eight instruments agree within about 3% over 400 to 840 nm, some large biases exist. The model provides a sensitive assessment of instrument response trends.

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“…For example, when performing multi-phase optical observations on different satellites, researchers found that the trend of the optical curves at large longitudinal phase angles tends to be gentle [10,14], which means that the influence of earthshine on the satellite is more outstanding than that of the sunlight. Similarly, there is an opposition effect at the large lunar phase angle (defined as the angle between the earth and the sun as viewed from the moon) when observing the moon [15], which interferes with satellite observations in many times.…”

Section: Related Workmentioning

confidence: 99%