Fig. 2From: Improving BDS broadcast ephemeris accuracy using ground-satellite-link observationsSatellite clocks differences between ODTS and TWSTFT techniques used for the period of Doy of Year (Doy) 148–150 in 2017, where average biases are subtracted for each satellite and only the periodic variations are shown. The value in the legend box shows the Standard Deviation (STD) of the clock differences for the corresponding satelliteBack to article page