In respect to the ground, the horizontal speed does not change at this time. That is wrong, because orbital mechanics should forbid that as the vertical speed at Ap and Pe is zero and the horizontal speeds not equal to each other with an eccentricity different to zero.
In respect to the ground, the horizontal speed does not change at this time. That is wrong, because orbital mechanics should forbid that as the vertical speed at Ap and Pe is zero and the horizontal speeds not equal to each other with an eccentricity different to zero.