Thales

Sylvain Fontaine

Michel Subelet

Nicolas Marty

Pierre Gamet

Bernard Fabre

Carine Moncourt

The invention relates to a database and a method of generating a database containing topographical information on obstacles distributed over a geographic area subdivided into cells. The method includes reading topographical data obtained from heterogeneous sources. Topographical data are generated which relate to pointlike obstacles from the information collected from the topographical data. Topographical data are generated which relate to linear obstacles from the information collected from the topographical data. The obstacle database is created. Each cell contains a link to the obstacles whose coordinates in the geographic area covered by the cell are recorded with an uncertainty value. In particular, the invention applies to the generation of a database on board an aircraft.

Database comprising topographical information on obstacles and method for generating one such database

The invention notably relates to a method of detecting obstacles on the ground receiving an obstacle clearance sensor and a zone for extracting map data. The method comprises the following steps: In particular, the invention applies to the calculation of the warnings relating to the risks of collision with pointlike or linear obstacles taking into account the path of the aircraft and the altitude of the obstacles.

Method for predicting collisions with obstacles on the ground and generating warnings, notably on board an aircraft

A method for filtering anti-collision alarms for aircraft, the said aircraft comprising means for calculating its speed and extrapolated positions on its trajectory, the said extrapolated positions being calculated over a fixed maximum time period, called extrapolation time, and a topographical database of the terrain, the said database comprising, within a given perimeter, data on the density of obstacles, comprises a calculation of a weighting coefficient for the extrapolation time of the calculated extrapolated trajectories of the aircraft as a function of the density of obstacles within a surface area included within the perimeter.

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Villeneuve Tolosane, France

Sylvain Fontaine