Replacing static airways with dynamic four-dimensional spatio-temporal tubes for safe eVTOL operations.
Urban air mobility demands packing hundreds of aircraft into tight corridors between skyscraper clusters. 4D trajectory operations assign each vehicle a moving 4D bounding box (latitude, longitude, altitude, and arrival timestamp at each waypoint), guaranteeing absolute separation even in the presence of strong wind gusts.
When an inbound aircraft experiences a motor degradation or encounters an unpredicted updraft, the UTM core computes alternate conflict-free flight paths within 100 milliseconds, broadcasting revised speed constraints to surrounding traffic.