COMPARATIVE ASSESSMENT OF THE INFLUENCE OF THE ATMOSPHERIC ENVIRONMENT ON THE CHANGE OF THE RADAR RANGE TO THE OBJECTS TO BE OBSERVED IN TWO WAVE RANGES BY SHIP RADAR

Abstract

The radiophysical characteristics of the atmosphere and atmospheric formations, the influence of the conditions of propagation of radar signals on the range and accuracy of measuring the range of marine objects, the dependence of the magnitude of the error in the radar measurement of the range of a ship's radar station on the extent of the atmospheric formation are considered.

The contrast of the radar image of a marine object observed against the background of reflections from atmospheric formations, depending on the distance to the ship's radar antenna, is presented in relation to indicators with a brightness mark of shipborne radars. The analysis of the basic equation of radar of single objects is carried out, taking into account the change in their reflected power at a certain distance depending on the intensity of the atmospheric process.

The influence of atmospheric formation on the parameters of the echo signal of a marine object is analyzed. Depending on the parameters of the ship's radar, the echo signal of a marine object in precipitation of varying intensity will provide a different deviation of the signal strength of the object to the signal strength of the atmospheric formation, at which it is still possible to determine the distance to the marine object without creating an emergency, that is, at which it is still it is possible to fulfill the task of the ship's radar.

It is shown that in order to determine the maximum detection range of a marine object at the operating wavelength of a shipborne radar, it is sufficient to know only the ratio of the effective scattering area to the parameters of the atmospheric formation, mainly to the intensity of the atmospheric formation. Using these ratios for various reflective properties of an object and the reflective properties of an atmospheric formation, it is possible to predict the maximum distance to a marine object at a given intensity, which increases the safety of navigation in difficult atmospheric conditions.