Study on Near Field Angular Glint Computation Based on GRECO

The common predictions of angular glint are usually based on the condition of far-field hypothesis. However, computation of near field angular glint is very meaningful?both in academic studies and engineering applications due to its huge impact on tracking error. This paper presents an analytic prediction of near field angular glint computing based on Graphic Electromagnetic Computing (GRECO), which is both in real time and on omission of the process of scattering center extraction. The condition that targets cannot be covered by radar beam is firstly considered, which makes the prediction of tracking error more complete. The correctness is validated by comparison between the simulated results and the theoretical ones of several models.