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Influence
of Albedo and Relief on the Lunar Photometric Function
Velikodsky Yu.I. The Influence of Albedo and Relief
on the Law of Brightness Distribution over Lunar Disk // Thesis
for a degree of candidate of physical and mathematical sciences
(Ph.D.). -Kharkov, 2002. In Russian.
The dissertation is devoted to the experimental study of the
law of light reflection by the Moon. The empirical formula of
phase dependence of the smoothness factor of lunar surface in
an interval of phase angles 0-135° is obtained, that permits
to perform the comparative analysis of optical properties of the
all lunar disk. Using a theory describing light scattering by
porous surfaces, absence of essential influence of albedo on latitude
dependence of brightness of a lunar surface is proved. It is shown,
that at phase angles, at least, up to 142°, the smoothness
factor q is determined only by a relief practically for all surface
of the Moon. On the basis of the space data it is shown, that
the smoothness factor of some flat mare areas, as against the
rest of lunar surface, depends on albedo. It is related to low
degree of a roughness of these areas.
Full
text (html, in Russian)
Yu.I.Velikodsky, L.A.Akimov, and V.V.Korokhin. The
Latitude Dependance of Brightness of the Lunar Surface //
Lunar and Planet. Sci. 33-rd. Abstract #1860. 2002. LPI. Houston.
It was obtained values of parameter of empirical Akimov's formula
for different types of the lunar surface. Spectral dependance
of this parameter was studied.
Full
text (pdf)
Yu.I.Velikodsky,
L.A.Akimov, and V.V.Korokhin. Two-parameter Empirical Photometric
Function in Analysis of Earth-based Observations of the Moon
// Lunar and Planet. Sci. 30-th. Abstract #1391. 2000. LPI. Houston.
Improved
empirical Akimov's formula is presented. This photometric function
gives a good fit to Earth-based and Clementine observational data.
An influence of albedo and relief on the disk brightness distribution
is discussed.
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text (pdf)
Kreslavsky M.A., Shkuratov Yu.G., Velikodsky
Yu.I., Kaydash V.G., Stankevich D.G., and Pieters C.M. Photometric
properties of the lunar surface derived from Clementine observations
// J. Geophys. Res. -2000. -V.105, No.E8. -P.20281-20295.
Akimov L.A., Velikodsky Yu.I., and Korokhin V.V.
Dependence of Latitude Brightness Distribution Over The Lunar
Disk On Albedo And Relief // Kinematika
i fisika nebesnykh tel. -2000. -V.16, No 2. -P.181-187. In Russian.
Results of brightness distribution measurements
of the lunar disk and laboratory samples at different phase angles
in blue and red spectral bands are presented. It is shown for
the Moon that brightness falling with photometric latitude is
formed mainly by micro- and mesorelief of its surface. Small decreasing
of brightness falling with wavelength is due to not so much albedo
changing as changing of microrelief size range which has an influence
on the law of light reflection by the Moon.
Akimov L.A., Velikodsky
Yu.I., and Korokhin
V.V. Dependence
of Lunar Highlands Brightness on Photometric Latitude // Kinematika
i fisika nebesnykh tel. -1999. -V.15, No 4. -P.304-309. In Russian.
Results
of photometric measurements of the Moon at different phase angles
are presented. Brightness distribution as the function of photometric
latitude has been studied. It is shown that brightness falling
to poles increases with phase angle a,
and at a~120° the Moon reflects
nearly by the Lambert's law. The origin of such phenomenon is
discussed.
2003/01/19
