| Popis: |
The Moon-based platform has different observation angular characteristics from artificial satellites due to its peculiar orbit. To illustrate the difference, we first normalize the positions and attitudes of the Sun, Earth, and Moon into the same reference system using coordinate transformations. Then, we calculate the observation angles (including viewing elevation angel, solar elevation angel and relative azimuth angle) distribution of satellites in LEO, GEO and at Lagrange L1 satellites during the same period. Furthermore, the observation angles distribution of the Moon-based platform in different seasons with the Earth observed point located at different positions are analyzed. Results revealed that compared to artificial satellites, the Moon-based platform has continuous viewing observation angles and solar observation angles. Its observation angles change with the seasons, and it provides more angular information for equatorial regions than polar regions of the Earth. |
