System and method for detecting, locating and identifying objects located above the ground and below the ground in a pre-referenced area of interest

Method for detecting, locating and identifying objects above the ground and below the ground comprising an area of interest, an airborne vehicle circumscribing said area of interest, that is provided with a radar comprising an antenna with its respective transmitter and receiver device, signal processing means, data storage means and graphical interface means, characterized in that it comprises:

• setting a rectangular reference framework based on a point of reference, base points and orientation points around the area of interest;
• transmitting an sinusoidal electromagnetic signal whose frequency is varied in predetermined and accurate stepped stages to illuminate the area of interest and reference framework;
• mixing the reflected signal with the signal sent to obtain sets of values corresponding to the phases of each frequency step or stage, wherein said sets of values are obtained over successive scannings as the antenna moves;
• applying the inverse Fourier transform to the sets of values in order to obtain a set of range measurements for objects in the ground illuminated by the radar light beam;
• sequentially aligning each of the range measurements in the same sequence in which they were obtained from successive scannings for obtaining an image;
• processing said image through the use of a detection algorithm, which accurately determines the location of each object in the scanning region, obtaining a map of location of objects above the ground and below the ground;
• calibrating the map in order to obtain distances and heights expressed in length;
• georeferencing the calibrated image to submit space coordinate data in the image, according to the following sub-steps:
• geometrically encoding the calibrated image to identify and assign a code to each measured point in creating the framework;
• building a point densification based on points obtained on the ground in order to generate a digital field model, with which the image is orthogonally rectified and all vertical distortions and exaggerations in the image are corrected;
• correlating the pixels in the image in the above point and imposition of ground point coordinates, controlling the location with the points generated in densification;
• drawing up a risk map containing position vectors of the objects;
• and remapping the object coordinates in the image obtained in the previous step for marking on the ground.