1998 Fiscal Year Final Research Report Summary
Reserch on spectral property of planetary materials for the fundamentals of the remote sensing data
| Project/Area Number |
09490017
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
広領域
|
|---|
| Research Institution | Nagoya University |
|---|
Principal Investigator |
YAMAGUCHI Yasushi Graduate School of Science, Nagoya University, Associated Professor, 大学院・理学研究科, 助教授 (80283472)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HIRAHARA Yasuhiro Graduate School of Science, Associated Professor, 大学院・理学研究科, 助教授 (30252224)
TAKANO Masao Graduate School of Science, Associated Professor, 大学院・理学研究科, 助教授 (90262849)
ENAMI Masaki Graduate School of Science, Associated Professor, 大学院・理学研究科, 助教授 (20168793)
OGAWA Katsuro Graduate School of Science, Professor, 大学院・理学研究科, 教授 (40262844)
|
|---|
| Project Period (FY) |
1997 – 1998
|
| Keywords | remote sensing / FTIR / infrared spectrum / silicate mineral / reflectance spectrum / absorption spectrum / mineral identification / spectral index |
|---|
| Research Abstract |
By using the Fourier Transform Infra-Red spectrometer (FTIR), spectral data of typical silicate minerals and river deposits were obtained. For a solid sample, a bi-directional reflectance spectrum and a hemispherical reflectance spectrum are similar, and a reflectance spectrum and an emittance spectrum indicate reverse correlation. We also examined the optimum conditions for spectral measurements, e.g., sample grain size, mixture ratio, etc. In reflectance spectra of river deposits, absorption features due to Si-O and Si-OH stretching vibrations in quartz and clay minerals were clearly observed in the samples collected in the sedimentaiy rock areas.
By installing the step-scan option for the FTIR, we developed the instrument which enables to measure the absorption and emission spectra of chemically unstable species as the candidates of interstellar matter, and qualified the status of the experimental system. In order to simulate the disequilibrium condensation and/or evaporation process
… More
es occurred in the proto-planetary nebulae, the microwave nebulizer was combined with the FTIR spectrometer. As a result, we demonstrated that the experimental system developed in the present study is applicable to the in-situ spectroscopic measurement of the chemically reactive regions with high sensitivity and high wavelength resolution.
We investigated remote sensing data analysis methodologies. Firstly, we developed a method to convert observation data to surface reflectance by using a snow field, and showed a relationship between laboratory spectra and remote sensing data. Spectral indices for discrimination of typical minerals and an algorithm to estimate silica contents from thermal infrared spectra were also proposed. Multispectral image data of moon surface obtained by Clementine were analyzed , and an algorithm was developed in order to estimate Ti and Fe contents by removing the space weathering effect. As a result, we obtained new findings on geology and evolution of Serenitatis area from the Clementine data. Less
|
