Abstract:Owing to the real - time variations in the position of the airborne platform and the attitude angles of the carrier, and considering that the antenna system is significantly affected by high - altitude environmental factors, beam pointing angle errors are bound to occur during the actual beam scheduling process. which affects the tracking and measurement of the detected targets.Conventionally, the approach of installing an isolation platform has been employed to mitigate the influence of attitude angles. Nevertheless, due to the bulkiness and high cost of the isolation platform, it is not applicable to most airborne platforms. Typically, the issue of beam pointing accuracy on a moving platform is addressed by formulating a pointing angle transformation model and devising a phased array scanning phase code.For airborne platforms dedicated to measurement, multiple targets must be searched, tracked, and the associated measurement tasks completed. During these tasks, there are stringent accuracy requirements for indicators such as the position parameters and resolution of the targets. Therefore, aside from paying attention to the coordinate transformation model and phase code design, it is essential to establish a high - precision spatio - temporal reference through the integrated processing of GNSS/INS positioning and attitude measurement. Moreover, measures such as system - level joint calibration, error separation, and wideband spatial phase compensation are adopted to guarantee stable and continuous target tracking.After undergoing dynamic flight tests, the compensation algorithm has demonstrated its ability to achieve high - precision tracking and measurement of targets under high - dynamic and complex motion conditions. The test results of the pointing accuracy fully meet the requirements of the technical specifications.
