System and Method for Merging Meteorological Data Predicted and Measured on an Aircraft
AssigneeThales
InventorsPhilippe Chaix, Alex Bourdon, Alexandre Grattard
Life of this patent
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Abstract
The invention consists in merging together the predicted and measured meteorological data to supply them to the flight prediction calculation system so as to smooth the discontinuities brought about in the prior art by the simple update which is carried out. This merging is advantageously done by linear weighting of the data, the weighting coefficient depending upon the positioning in vertical and horizontal distances between the predicted point and the aeroplane in relation to chosen thresholds.
Claims10
System for calculating flight predictions of an aircraft comprising a module for capturing first atmospheric data (WM, TM) in the vicinity of the aircraft, a module for inputting second atmospheric data (WF, TF) at waypoints in front of the aircraft, a module for merging said first and second data into third atmospheric data (W, T) to be used as input for calculating flight predictions, said merging being performed by calculating a linear weighting of the first and second data of coefficient K and formulae W=WM×(1−K)+WF×K, T=TM×(1−K)+TF×K, wherein said coefficient K is a function of the values of the projected horizontal X and vertical H distances between the predicted point and the aeroplane position in relation to chosen thresholds Da, Db, Ha, Hb.
Method for calculating flight predictions of an aircraft comprising a step for capturing first atmospheric data (WM, TM) in the vicinity of the aircraft, a step for inputting second atmospheric data (WF, TF) at waypoints in front of the aircraft, a step for merging said first and second data into third atmospheric data (W, T) to be used as input for calculating flight predictions, said merging being performed by linear weighting of the first and second data of coefficient K and formulae W=WM×(1−K)+WF×K, T=TM×(1−K)+TF×K, wherein said coefficient K is a function of the values of the projected horizontal X and vertical H distances between the predicted point and the aeroplane position in relation to chosen thresholds Da, Db, Ha, Hb.
Dependencies are inferred from the claim text.