Abstract: Provided are methods, systems, and devices for airspace and airport management. In one example, geospatial data related to airspace boundaries, with geographical point-based data including Flight Information Regions (FIRs), Upper Information Regions (UIRs), latitude, longitude, and sequence numbers are used along with geospatial polygons based on the geospatial data to define airspace boundaries. Route strings representing waypoints that define a planned flight path are processed by decoding them into geographic coordinates, which include latitude and longitude values. A flight path is constructed based on these coordinates, and flown coordinates are determined from real-time flight data to construct flown data. Either the flight path data or the flown data is assigned as selected route data based on a country-specific billing function.

Abstract: A modular exhaust after-treatment system including a plurality of exhaust after-treatment modules. Each module includes a housing defining a non-linear flow path arranged between an inlet passage and an outlet passage. The non-linear flow path includes a first portion adjacent the inlet passage that includes a first exhaust treatment component, a second portion downstream from the first portion, and a third portion downstream from second portion adjacent the outlet passage, wherein the third portion includes a second exhaust treatment component. The plurality of exhaust after-treatment modules are secured to each other in either horizontally or vertically.

Abstract: A modular exhaust after-treatment system including a plurality of exhaust after-treatment modules. Each module includes a housing defining a non-linear flow path arranged between an inlet passage and an outlet passage. The non-linear flow path includes a first portion adjacent the inlet passage that includes a first exhaust treatment component, a second portion downstream from the first portion, and a third portion downstream from second portion adjacent the outlet passage, wherein the third portion includes a second exhaust treatment component. The plurality of exhaust after-treatment modules are secured to each other in either horizontally or vertically.