Clarification of process of formation of lunar secondary crust by telescopic spectrum imaging : the role of impact tectonics

为了了解火山就位分布与岩浆起源之间的关系，月海物质的光谱分析是必不可少的。为了获得月球近侧的光谱数据，研制了地基月球光谱成像仪。地基月球维斯/近红外光谱成像仪由牛顿望远镜组成（F5，焦距150 cm）、光谱仪、可见光照相机（SBIG ST-7 E）、近红外照相机（SU Inc，SU 320 -1. 7 RT-D）和观察照相机。在大气吸收和月面相位角相同的条件下，可以获得可见光和近红外光谱成像数据。光谱和空间数据分别记录在两个区域传感器的每行和每列中。重点研究了950 nm附近的吸收带，该吸收带指示了镁铁质矿物的含量。有效波长在600 ~ 1600 nm之间，利用观测摄像机的图像确认观测区域时，可以远程控制望远镜（Takahashi EM 500 Tenma PC）的赤道安装。通过改变成像位置，可以获得光谱图像和二维空间图像。考虑到色散效率，可以获得8 nm的波长分辨率。需要进行一些合并以获得约200的足够信噪比。对光谱成像仪进行了实地观测和月海观测。确认了光谱和特殊分离度。获得了月球光谱图像。还开发了光谱图像分析程序。

The spectral analysis of mare materials is essential, in order to understand the relationship between the distribution of volcanic emplacements and origins of magma In order to obtain spectral data of nearside of the moon, a ground based Lunar Spectral Imager was developed.Ground-based Lunar VIS/Near IR Spectral imager consists of a Newton telescope(F5, focal length of 150 cm), a spectrometer, visible camera (SBIG ST-7E), a near infrared camera (SU Inc, SU320-1.7RT-D), and a viewing camera. Visible and near infrared spectral imaging data can be obtained on the same condition of the atmospheric absorption and the phase angles of the lunar surface. Spectral and spatial data are recorded in each line and column of both area sensors, respectively. It focuses on the absorption band around 950 nm which indicates the contents of mafic minerals. The effective wavelength is between 600 and 1600nm.The equatorial mounting of the telescope (Takahashi EM500 Tenma PC) is controlled remotely while confirming the observed regions using images of viewing camera. While shifting imaging positions, spectral and 2dimentional spatial images can be obtained. Taking into consideration of the dispersion efficiency, wavelength resolutions of 8 nm can be obtained. Some binning is required to obtain enough Signal to Noise Ratio about 200. The evaluation of spectral imager has been conducted in-situ and by observing lunar mare. Spectral and special resolutions were confirmed. Lunar spectral images have been obtained. Programs for the analysis of spectral images are also developed.