Parametric polarization radio-location method of improvement of radio-location observation of navigational objects against the background of natural hindrances

Abstract

It should be taken into account the presence of atmospheric formations on the vessel's route during radar observation of navigational objects which, with sufficient intensity of signals reflected from them, can mask the echo-signals of navigational objects on the indicators of the ship's radar. Taking into account the polarization transformations, radiated electromagnetic waves while their interaction with the navigation and atmospheric objects allows to allocate the echo-signals of the navigation object from the total echo signal. To solve this problem, the principle of separation of the observed ship's radar objects will be used, in terms of the ratio of their basic dimensions to the emitted wave and the features of scattering of electromagnetic waves emitted by the ship's radar antenna. Also will be used method which based on the use of the polarization structure of the radar signals reflected from the navigation object and atmospheric formation when they are irradiated by electromagnetic waves of four polarizations. Electromagnetic waves radiated by the ship's radar antenna and reflected from the navigation and atmospheric objects are represented by means of four Stoke’s parameters. The reflecting properties of the navigation object and atmospheric formation are represented as a matrix of 16 coefficients, each of them is the effective reflecting surface of the navigation object and atmospheric formation. The analysis and description of the polarization method for dividing the echoes of the navigation object from the echoes of atmospheric formation is given.