Thanks for the great tour of Buenos Aires. The three plane shadows when you should just have one are due to digital, rather than film imagery. Digital creates extra "ghost" images of moving objects. The jet itself, using the clockface analogy, is at 3, the true shadow is at 6, the ghost image of the plane is at 12, and the ghost image of the shadow is at 9. Film imaging has its own kind of duplication. The best I know of is of a plane approaching Boston's Logan International. Use search to get you to Boston quickly, turn on the Keyhole Community BBS layer to the left of the viewer, and use the i-links to find out more about it.