Modeling results for the fictitious CME with the sphere and spheroidal CME models. The panels show the radial speed v_r in the equatorial (left) and meridional (right) plane on 2023-01-01 05:57 UT when the CME nose was close to 1 au in both simulations. Representative scaled number density nr² values are indicated by the gray contour lines. (a, b) spherical (cone) CME model, (c, d) spheroidal CME model. The green lines marks directions to representative virtual spacecraft located at θ = 0° and ϕ between −90° and 90°, with 10° increments.