Method for detecting mobile objects using passive submarine buoys
AssigneeThales
InventorsGilles Kervern, Didier Billon, Jean Le Gall
Life of this patent
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Abstract
The invention is a process relating to the processing of the signals sent by passive buoys dropped from an aircraft so as to compile EGP (Energy Geographic Plot) maps. The process is split into three steps: the first makes it possible to produce an EGP map of the x,y positions of the noise sources, the second makes it possible to associate the velocities Vx, Vy with certain designated positions and the third makes it possible to eliminate the noise sources regarded as hampering the readability of the maps.
Claims5
A process for detecting mobile objects by means of passive underwater buoys making it possible to obtain so-called EGP maps, each buoy allowing the formation of Nv directive pathways, wherein the signals from the buoys are processed in three steps:
- a first step (99-102) making it possible to obtain an EGP map of the x,y positions of the objects,
- a second step (110-120) making it possible to obtain an EGP map of the velocities Vx,Vy as well as an estimated spectrum for each arbitrary position x,y of the EGP map of the positions, maps exhibiting the Doppler ambiguity loci,
- a third step (140-144) allowing the elimination from the maps of the objects regarded as strong sources of noise.
Dependencies are inferred from the claim text.