Search Results - "Hapke, Bruce"

Space weathering from Mercury to the asteroid belt by Hapke, Bruce

“…The variety of evidence bearing on the nature of space weathering is reviewed. The effects of space weathering include spectral darkening, reddening and…”
Get full text

Characterization of space weathering from Lunar Reconnaissance Orbiter Camera ultraviolet observations of the Moon by Denevi, Brett W., Robinson, Mark S., Boyd, Aaron K., Sato, Hiroyuki, Hapke, Bruce W., Hawke, B. Ray

“…We investigate the effects of space weathering at ultraviolet wavelengths using a near‐global seven‐band (321–689 nm) mosaic from the Lunar Reconnaissance…”
Get full text

Bidirectional reflectance spectroscopy 7 The single particle phase function hockey stick relation by HAPKE, Bruce

“…The measured volume-average single particle angular scattering functions of a large number of types of particle of interest for planetary regoliths in the…”
Get full text

Bidirectional reflectance spectroscopy 8. The angular width of the opposition effect in regolith-like media by Hapke, Bruce

“…The opposition effect is the sharp, narrow surge observed in the reflectance of a scattering medium near zero phase angle. Numerous observations and…”
Get full text

Do deep electrical discharges initiated by solar energetic particle events occur in the lunar regolith? by Hapke, Bruce

“…Theoretical modelling has suggested that the deposition of charged solar energetic particles in the lunar regolith can generate electric fields strong enough…”
Get full text

Bidirectional reflectance spectroscopy 6. Effects of porosity by HAPKE, Bruce

Get full text

Mineralogy of Martian atmospheric dust inferred from thermal infrared spectra of aerosols by Hamilton, Victoria E., McSween Jr, Harry Y., Hapke, Bruce

“…We have utilized optical constants derived from thermal infrared spectra acquired by the Mariner 9 Infrared Interferometer Spectrometer (M9 IRIS) and Mars…”
Get full text

A quantitative test of the ability of models based on the equation of radiative transfer to predict the bidirectional reflectance of a well-characterized medium by Hapke, Bruce W., Shepard, Michael K., Nelson, Robert M., Smythe, William D., Piatek, Jennifer L.

“…Predictions of two widely-used regolith reflectance models, a numerically exact computer code and an approximate analytic equation, based on the equation of…”
Get full text

The Opposition Effect of the Moon: Coherent BackscatterandShadow Hiding by Hapke, Bruce, Nelson, Robert, Smythe, William

“…The electromagnetic scattering properties of Solar System regoliths are commonly interpreted using the lunar regolith as a prototype. Hence, a thorough…”
Get full text

The porosity of the upper lunar regolith by Hapke, Bruce, Sato, Hiroyuki

“…•The lunar regolith porosity estimate by Ohtake et al. (2010) has been reexamined.•The best value for the porosity is 83±3%, although the actual porosity could…”
Get full text

Scattering properties of planetary regolith analogs by Piatek, Jennifer L., Hapke, Bruce W., Nelson, Robert M., Smythe, William D., Hale, Amy Snyder

“…The physics of scattering of electromagnetic waves by media in which the particles are in contact, such as planetary regoliths, has been thought to be…”
Get full text

Comment on “A critical assessment of the Hapke photometric model” by Y. Shkuratov et al by Hapke, Bruce

“…Criticism of theories and models is an important part of science and can lead to increased understanding and improvement of the models. Unfortunately, the…”
Get full text

Spectroscopic observations of the Moon at the lunar surface by Wu, Yunzhao, Hapke, Bruce

“…The Moon's reflectance spectrum records many of its important properties. However, prior to Chang'E-3 (CE-3), no spectra had previously been measured on the…”
Get full text

Bidirectional Reflectance Spectroscopy: 5. The Coherent Backscatter Opposition Effect and Anisotropic Scattering by Hapke, Bruce

“…A model published previously by the author that describes light scattering from particulate media is modified to include several improvements: (1) a better…”
Get full text

Lunar mare TiO2 abundances estimated from UV/Vis reflectance by Sato, Hiroyuki, Robinson, Mark S., Lawrence, Samuel J., Denevi, Brett W., Hapke, Bruce, Jolliff, Bradley L., Hiesinger, Harald

“…•We constructed a new TiO2 map from LROC WAC near-global mosaic.•TiO2 contents of lunar soil samples and 321/415 nm ratio are linearly…”
Get full text

Bidirectional reflectance spectroscopy 7 by Hapke, Bruce

“…► Double Henyey–Greenstein functions can describe regolith particle phase functions. ► The two HG function parameters are inversely correlated. ► The…”
Get full text

Corrigendum to “Lunar Reconnaissance Orbiter Wide Angle Camera algorithm for TiO2 abundances on the lunar surface including low-Ti maria” [Icarus 321 (2019) 141–147] by Hapke, Bruce, Sato, Hiroyuki, Robinson, Mark

“…A critical typographical error and the value of a parameter in the new Lunar Reconnaissance Orbiter Wide Angle Camera TiO2 algorithm are corrected…”
Get full text

Photometric changes on Saturn's Titan: Evidence for active cryovolcanism by Nelson, Robert M., Kamp, Lucas W., Lopes, Rosaly M. C., Matson, Dennis L., Kirk, Randolph L., Hapke, Bruce W., Wall, Stephen D., Boryta, Mark D., Leader, Frank E., Smythe, William D., Mitchell, Karl L., Baines, Kevin H., Jaumann, Ralf, Sotin, Christophe, Clark, Roger N., Cruikshank, Dale P., Drossart, Pierre, Lunine, Jonathan I., Combes, Michel, Bellucci, Giancarlo, Bibring, Jean-Pierre, Capaccioni, Fabrizio, Cerroni, Pricilla, Coradini, Angioletta, Formisano, Vittorio, Filacchione, Gianrico, Langevin, Yves, McCord, Thomas B., Mennella, Vito, Nicholson, Phillip D., Sicardy, Bruno, Irwin, Patrick G. J., Pearl, John C.

“…We report infrared spectrophotometric variability on the surface of Saturn's moon Titan detected in images returned by the Visual and Infrared Mapping…”
Get full text

The wavelength dependence of the lunar phase curve as seen by the Lunar Reconnaissance Orbiter wide-angle camera by Hapke, Bruce, Denevi, Brett, Sato, Hiroyuki, Braden, Sarah, Robinson, Mark

“…The Lunar Reconnaissance Orbiter wide‐angle camera measured the bidirectional reflectances of two areas on the Moon at seven wavelengths between 321 and 689 nm…”
Get full text

The Opposition Effect of the Moon: The Contribution of Coherent Backscatter by Hapke, Bruce W., Nelson, Robert M., Smythe, William D.

“…The opposition effect, the sharp surge in brightness of an astronomical object observed near zero phase angle, which has been known for more than a century,…”
Get full text