The reconstituted trajectory of the atmospheric probes determined that the wind averaged 200 m/s in the middle cloud layer, 50 m/s at the base of these clouds and just 1 m/s on the ground. Overall data from airborne sensors confirmed and refined the data obtained by the Soviet Venera program that preceded the American mission to Venus

Trajectory

Diagram of the PVM's path to planet Venus from Earth in 1978, and this also notes the launch of the Pioneer Venus Orbiter

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