Method and device for visualizing an effect of wind on an aircraft travel

1. A method for visualizing an effect of wind on aircraft travel of a plurality of aircraft, the method comprising:

determining at least one wind speed and wind direction for a predefined airspace,

identifying predefined travel routes for the plurality of aircraft within the predefined airspace, wherein each of the predefined travel routes defines a route for the respective aircraft of the plurality of aircraft when approaching an airfield,

calculating reference distances flown by each aircraft along route segments of its travel routes in a predefined reference time interval, wherein the calculating uses:

at least one air speed of the respective aircraft at the respective route segment,

the determined wind speed, and

the determined wind direction,

on a display, displaying, to an air traffic controller, the predefined travel routes or the route segments; and

indicating, on the display, the reference distances on the displayed predefined travel routes or route segments.

2. The method according to claim 1 , wherein:

for each aircraft traveling in a flight direction with an airspeed v, the reference distance Δd is calculated using the formula

Δ d =( v+v W )Δ t

with v W defining a wind speed component in the flight direction, and

Δt defining the predefined reference time interval.

3. The method according to claim 2 , wherein the determined wind speed and the determined wind direction are represented by a head wind or tail wind.

4. The method according to claim 1 , wherein:

a virtual aircraft is chosen as one aircraft of the plurality of aircraft; and

for the virtual aircraft, a generic flight is predetermined having predetermined flight properties at least for the air speed and the travel route.

5. The method according to claim 4 , wherein the predetermined flight properties for the virtual aircraft has average properties and a constant air speed.

6. The method according to claim 3 , wherein

for each aircraft, actual flight properties of said aircraft are used, at least for the air speed and for one of the travel routes.

7. The method according to claim 1 , wherein the method comprises:

for each aircraft of the plurality of aircraft a trajectory is determined; and

each trajectory incorporates:

the determined wind speed,

the determined wind direction,

an altitude profile, and

an airspeed profile,

each trajectory is displayed in a map view as a graph, wherein at least part of the displayed trajectory comprises predicted or predetermined values in the future, and

each displayed trajectory comprises markers indicating the at least one reference distance on the graph.

8. The method according to claim 1 , wherein the reference distances are displayed in a row.

9. The method according to claim 1 , wherein:

for each aircraft:

predefined travel routes or route segments are chosen, comprising at least two sections having different directions, and

at least one reference distance is calculated and indicated for each section.

10. The method according to claim 1 , wherein:

for each aircraft, reference distances are indicated by at least one indication of the list comprising:

digits given along the displayed predefined travel route or route segment indicating each reference distance, and

markers provided in a row along a graph in a map view, the graph representing the travel route or route segment.

11. The method according to claim 1 , wherein:

for each aircraft, the reference distances are indicated by a plurality of markers provided along a graph in a map view, the graph representing the travel route or route segment, wherein the markers are indicating reference distances in a row, the row is set with respect to at least one feature of the list comprising:

the row is set prior landing with a last marker representing a point of landing,

the row is set starting from a predefined route point of the travel route, with a first marker representing the route point,

the row is set starting from a current point in time, with a first marker representing the position of the respective aircraft at said point in time, and

the row is set from a first point in time of a set of points in time of equal time intervals, with a first marker representing the position of the aircraft at the first point of time of the set of points in time, wherein for each aircraft the same set of points in time is used.

12. The method according to claim 1 , wherein:

determining at least one wind speed and wind direction is implemented by determining a three-dimensional wind-field or a four-dimensional wind-field, and

the predefined airspace is defined by a plurality of three-dimensional or four-dimensional positions, wherein:

a three-dimensional position is defined by a horizontal position and an altitude, and

a four-dimensional position is defined by a horizontal position, an altitude and time, and

the three-dimensional wind-field or the four-dimensional wind-field assigns a wind speed and wind direction to each three-dimensional position or four-dimensional position, respectively.

13. The method according to claim 1 , wherein the calculating further uses an altitude of each aircraft.

14. A device for visualizing an effect of wind on aircraft travel, the device comprising:

a determination circuit for determining at least one wind speed and wind direction for a predefined airspace,

an identification circuit for identifying predefined travel routes of a plurality of aircraft within the predefined airspace, wherein each of the predefined travel routes define a route for the respective aircraft of the plurality of aircraft when approaching an airfield,

a calculation circuit for calculating reference distances flown by each aircraft along route segments of its travel routes in a predefined reference time interval, wherein the calculation circuit is configured to perform the calculation such that the calculating uses:

at least one air speed of the respective aircraft at the respective route segment,

the determined wind speed, and

the determined wind direction,

a display device for visualizing the predefined travel routes or the route segments to an air traffic controller, wherein the display device is provided for use to the air traffic controller, and

a controller for indicating said reference distance on the visualized predefined travel routes or route segments.

15. The device according to claim 14 , wherein the calculation circuit further uses the at least one altitude to perform the calculation.