Plasma column density as a function of the distance projected on the plane of the sky along the paths 1, calculated from the COR1-A and -B calibrated images, taken from 3:50 UT to 4:05 UT with 5-min time cadence, and by setting an angular distance of the plasma from the POS of the two coronagraphs of θ_A = + 16° and θ_B = −24°, respectively. The arrows with the same colors as the profiles considered approximately indicate the CME front at different times.