General analytical formulas derived within a uniform approximation in a previous paper by the present authors are utilized for determining the wave pattern of a vertically propagating HF wave that is totally or partially reflected from the ionosphere. The full three-dimensional wave is calculated accurately, also at the reflection point. Parameter values typical of ionospheric modification experiments at Arecibo and Tromsø are chosen. The influence of the geomagnetic field and collisions are properly taken into account but nonlinear and coupling effects are excluded. It is shown that the geomagnetic field affects the wave pattern strongly, especially in the Tromsø case, and leads to a very high swelling in the first wave maximum below the reflection point.