FOERFARANDE FOER FOELJNING AV RADARMAAL

摘要

A method for tracking a radar target in which the imaginary part of the complex elevation error signal is utilised. According to the invention, the value of the complex elevation error signal is calculated for a plurality of frequencies in a repeated sequence. The change between the different frequencies is used for determining the position within an arbitrary box. The values calculated at the zero crossing are utilised as measure of the inclination. The measure of the inclination is compared with inclinations calculated for zero crossings in a general case, whereby a single-valued box and position can be determined and thereby the associated elevation angle or target height can be calculated. The method is adapted for tracking at low height where multi-path propagation poses a problem in tracking according to known methods.