Recent Examples on the WebEver more baffling is the fact that the stationary waves are absent in the middle and lower cloud levels of Venus, not appearing until roughly 50 km above the surface (164,000 feet). Jay Bennett, Popular Mechanics, 15 Sep. 2017 These mysterious stationary waves were modeled in 3D using VIRTIS data as well as radio data from the Venus Radio Science experiment (VeRa) on Venus Express. Jay Bennett, Popular Mechanics, 15 Sep. 2017