在小样本观测数据情况下，研究利用日 地月方位信息和日月 星历表进行航天器自主导航以及利用DSP实现航天器自主导航器的技术。
The orientation information of the sun, the moon and the earth, together with ephemeris are utilized to develop autonomous navigation algorithm, as well as its realization by DSP hardware.
假设我们希望建立一个1901年8月3日当地出生的诞生星辰。我们就必须到书店去买1901年的星历表。
Supposing we wish to make a horoscope for a native born August 3rd 1901, we have to buy an ephemeris for the year 1901 at some book store.
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