"Voyager 1" surpassed the radial distance from Sun of "Pioneer 10" at 69.4 AU on 17 February 1998, because it was traveling faster gaining about 1.02 AU per year. "Pioneer 11", launched a year after "Pioneer 10", took similar data as Pioneer out to 44.7 AU in 1995 when that mission was concluded. Pioneer 11 had a similar instrument suite as 10, but also had a flux-gate magnetometer. Pioneer and Voyager spacecraft were on different trajectories, and thus recorded data on the heliosphere in different overall directions away from the Sun. Data obtained from Pioneer and Voyager spacecraft helped corroborate the detection of a hydrogen wall.