星空背景的建模与仿真

提出了一种基于星表数据的建模和仿真方法，模拟在任意观测时刻、任意观测地点观测到的星空背景。利用依巴谷星表，首先经过一系列时间转换，将所提供的在星表历元时刻的恒星位置数据转换到当前指定时刻的位置数据；然后经过一系列空间坐标转换，将恒星视位置坐标统一转换到观测点坐标，得到恒星在指定时刻相对于观测者的视住置；最后利用星空背景建模的结果，绘制出了在不同观测时刻和不同观测地点所观测到的星空背景。

Modeling and Simulation of Celestial Background

Based on the catalogue data, it is presented an approach for modeling and simulating the celestial background observed in any time and at any places. All this can be done with the Hipparcos catalogue in the following way. First, with a series of time conversion, the star position data of the catalogue epoch is converted into the position data of the named time. Then, the star visional coordinate is converted into the observation coordinate, and the star visional position is achieved in accordance with the observe at the named time. Finally, the celestial background at various observing time and places can be rendered using the modeling result.