Fig. 8
From: An effective approach for accurate estimation of VLBI–GNSS local-tie vectors
Image of the estimated rotation axes and observed target positions for the inside method. a Az axis and target positions. Red-colored vertical line stands for the estimated Az axis. Red dots represent the observed target positions. Red-colored circles represent trajectory of the target positions, used for the estimate of the Az axis; b El axes and target positions. Blue and light blue-colored horizontal lines stand for the estimated El axes. Blue and light blue-colored dots and circles represent the observed target positions and trajectory of the target positions, respectively