Moving target ordnance control

摘要

In an airborne radar system, moving ground targets are identified on a cathode ray tube (CRT) display and their motion tracked to allow precise delivery of air-to-ground weapons. Target location errors, due to the effect of target motion upon the doppler frequency of the received signals, and consequent angle measurement ambiguities introduced by the presence of clutter are significantly reduced. The target's radial velocity with respect to the electrical boresight of the system antenna is determined and a corresponding frequency adjustment is made to the processed signal in order to accurately locate the target on the display to lie in precise correspondence to its displayed stationary surroundings. The determination of target radial velocity also provides the measurement of target radial velocity also provides a precise interferometer antenna referenced azimuth angle estimate to be used for relative range and azimuth weapon guidance, independent of usually large angle errors arising from clutter effects within the field of view of the antenna, and of other hardware and navigational error sources associated with absolute angle measurement systems.