You are observing the construction of a bridge that will be initiated on the two banks of a river simultaneously, in such a way that the works will eventually meet in the middle of the river. You wonder, how do they make sure that the construction on the two sides will stay aligned with the millimeter precision that this project requires? You are aware of previous constructions where small miscalc ...[Read More]
Regional Reference Frames: Keeping Track of a Deforming Earth
Figure courtesy: Öykü Koç
