Fig. 1From: Influence of the GEO satellite orbit error fluctuation correction on the BDS WADS zone correctionVariations in \(\cos \left( {\alpha_{r}^{s} } \right) - \cos \left( {\alpha_{u}^{s} } \right)\) (top) and \(\cos \left( {\beta_{r}^{s} } \right) - \cos \left( {\beta_{u}^{s} } \right)\) (bottom) calculated using data from Beijing and Wuhan from February 20, 2018Back to article page