Mathematics – Logic
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p31e..04w&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #P31E-04
Mathematics
Logic
[5464] Planetary Sciences: Solid Surface Planets / Remote Sensing, [6250] Planetary Sciences: Solar System Objects / Moon
Scientific paper
The Chinese first lunar satellite, Chang’E-1, was launched on 24 Oct 2007 and ended its 16-month mission by impacting the Moon on 1st Mar 2009. The Interference Imaging spectrometer (IIM) which covers wavelengths from 480 to 960 nm with 32 channels onboard Chang’E-1 is aimed to acquire the composition of the Moon. The reflectance spectra of Apollo 16 soil 62231 measured in the laboratory and the corresponding area of undisturbed soil of Apollo 16 site was used for the calibration of IIM data. The sensor response is inhomogeneous and hence caused the hue changing from left to right. The area covering the calibration site was selected for the correction of the shading of IIM data. Two factors ensured that the corrected reflectance of each pixel has the physical meaning, i.e., reflectance of the surface. Firstly, the area for selecting the correction standard line is the same place as the land surface used for calibration, i.e., Apollo 16 landing site area. Secondly, the correction factor is derived from fitting the reflectance of the correction standard line which is corrected to the reflectance of 62231. The Aristarchus crater is one of the most concerned craters on the Moon due to its geological complex and spectral and geochemical diversity. In this preliminary study we chose the Aristarchus crater as our first example. Some individual pixels with high albedo and low reflectance at 918 nm intersperse among the west wall, which suggests that some individual fresh surface may be exposed. From its dispersed distribution and fresh surface we conclude that the landslide may exist on the west wall. It also seems that there are some collapsed materials on the left floor on the Lunar Orbit photograph. We found that a high correlation exists between the absorption center of the mafic minerals and the wavelength at which the first derivative equals to 0. The key parameter to identify minerals, absorption center, was produced with this correlation. The absorption center of the northwest wall is the shortest, while the south wall is the longest among the walls. The 8-km Väisälä crater also exhibits the lithologic heterogeneity. The absorption center for Väisälä crater is dichotomal while for Aristarchus is trisectional. The mineral assemblages of the southwest and northeast wall of Väisälä are probable orthopyroxene and clinopyroxene, respectively. Besides the two kinds of pyroxene, the south wall of Aristarchus probably contains olivine. A region with shorter absorption center than that of the dark mantle deposits was found between the Aristarchus and Väisälä crater. The absorption center of this area is similar with that of the northeast wall of Väisälä but longer than that of the nearest wall (southwest wall) of Väisälä. The origin of the materials of this region needs further investigating.
No associations
LandOfFree
Absolute Calibration of the Chang’E-1 IIM camera and its preliminary application does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Absolute Calibration of the Chang’E-1 IIM camera and its preliminary application, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute Calibration of the Chang’E-1 IIM camera and its preliminary application will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1770738