Geovectoring: Reducing Traffic Complexity to Increase the Capacity of UAV airspace

Both U-space in Europe, as well as UTM in the USA, develop concepts and tools for UAV airspace. Enabling highdensity operations is one of the goals of these studies. Past and recent studies have analysed which factors affect the capacity of a UAV airspace. An improved understanding of this can lead to control methods for capacity management. Two...

Modeling Airspace Stability and Capacity for Decentralized Separation

In the context of decentralized separation, airspace stability pertains to the propagation of con?ict chain reactions as a result of tactical con?ict resolution maneuvers. This notion of airspace stability has been used in previous literature to develop a semi-empirical method for determining the capacity of a decentralized direct-routing...

Modeling the Intrinsic Safety of Unstructured and Layered Airspace Designs

Previous research relating airspace structure and ca-pacity has shown that a decentralized layered airspace concept, in which each altitude band limited horizontal travel to within a prede?ned heading range, improved safety when compared to unstructured airspace. However, the extent of the safety bene?ts of such layered airspace designs were not...

How Do Layered Airspace Design Parameters Affect Airspace Capacity and Safety?

In many ATM studies experiments are performed to determine the capacity. This paper looks at the effect of airspace design on the capacity. Using an algebraic approach a relation is derived between the design parameters of a layered airspace design and the capacity of the airspace. The validity of the assumptions which are used in this...

The Relationship Between Traffic Stability and Capacity for Decentralized Airspace

The work that is presented in this paper is part of an ongoing study on the relationship between structure and capacity of decentralized airspace concepts. In this paper, the effect of traffic stability, which considers the occurrence of conflict chain reactions as a result of conflict resolution maneuvers, on capacity is examined closely. Using...

Optimalisatie van afmetingen spuiopeningen in huidig voorontwerp van open spuisluis in Afsluitdijk

Voorspellingen van het Intergovernmental Panel on Climate Change (IPCC) over veranderingen in klimaat en bodemdaling geven aan dat de stijging van de zeespiegel, gecombineerd met de bodemdaling, in Nederland kan leiden tot een relatieve zeespiegelstijging van 25 cm tussen het jaar 2000 en 2050. Een ander verwacht effect van de...