Fig. 7

Schematic view of elliptical arcs used for accuracy estimation. Schematic view of elliptical arcs used for accuracy estimation of pointing correction, to which bias and noise calculated based on Eq. (4) and Table 3 are added, in the cases of (a, b) dayside images and (c, d) LIR images. Dotted lines are true ellipses, and solid lines are elliptical arcs simulating the Venus limb. A cross in each panel is the center of the true ellipse