Fig. 1From: Comparison of shadow models and their impact on precise orbit determination of BeiDou satellites during eclipsing phasesOccultation of the Sun by the Earth and the Moon (S: the Sun; E: the Earth; M: the Moon). \({\alpha }_{s}\), \({\alpha }_{e}\) and \({\alpha }_{m}\) stand for the radius of the Sun, the Earth, and the MoonBack to article page