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METHOD FOR GEOLOCALIZATION OF ONE OR MORE TARGETS

  • US 20090034795A1
  • Filed: 02/07/2007
  • Published: 02/05/2009
  • Est. Priority Date: 02/08/2006
  • Status: Active Grant
First Claim
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1. A method for geolocalization of at least one stationary target P from an aircraft by means of a passive optronic sensor, comprising the following steps:

  • acquisition by the sensor of at least one image I1 containing the target P from a position C1 of the aircraft and of an image I2 containing the target P from a position C2 of the aircraft, these images I1 and I2 having an area of overlap;

    identification in said overlap area of the target P common to the two images I1 and I2 and determination of the position of the common target P in each of the two images;

    calculation of the distance d between a point C, of known coordinates relative to C1 and C2, and the target P, as a function of the angle β

    1 between a reference direction and the line of sight of the image I1, the angle β

    2 between the same reference direction and the line of sight of the image I2, and of the position of the target P in the image I1 and in the image I2; and

    P being defined in a terrestrial reference frame by its x-coordinate X and its y-coordinate Y relative to the projection on the ground of the aircraft C, calculation of X and Y for the target P as a function of the distance d.

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