SPC (black line) and SPAN-I (red line) measurements for the ingress phase of the designated encounter period 8 (restricted to heliocentric distances < 40 R_⊙). The panels show heliocentric distance (top panel), radial velocity component (middle panel), and number density (bottom panel) with respect to time, starting at approximately 26 April 2021 and ending at approximately 29 April 2021. The displayed measurements indicate the complementary nature of SPC and SPAN-I, transitioning at approximately 25 R_⊙.