1. The heliotropic, great-circle and Hipparcos telescope reference frames are explicitly defined in the light of the scanning law of Hipparcos satellite.
本文从依巴谷卫星扫描观测原理出发，给出对日参考架、扫描大圆参考架和望远镜参考架的明确定义；
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2. The heliotropic, great-circle and Hipparcos telescope reference frames are explicitly defined in the light of the scanning law of Hipparcos satellite.
