光学综合孔径冗余基线校正法中的阵列设计

Array design of redundant spacings calibration technique for optical aperature synthesis

针对光学综合孔径相位校正法中的冗余基线校正法,利用矩阵论详细分析了其原理和阵列结构要求。指出该方法可以实现由仪器或传输介质等引起的相位误差的实时校正而无需建模或反复计算,但阵列结构必须含有足够多的用于校正误差的冗余信息,即相应的矩阵必须满秩且具有较小的条件数和栅距,以保证解的唯一性。在此基础上,提出新的12孔冗余阵列结构。仿真实验结果表明新阵列相应的矩阵满秩且条件数为21.3177,栅距为1/93,满足设计要求,可以用于实际应用中。

Redundant spacings calibration is one of phase calibration techniques for optical aperture synthesis system.Its principle and array configuration requirement are analyzed using matrix theory.This technique allows the removal of phase errors caused by instrument-or medium-induced phase errors without requiring a model of the source or iterative calculations.But the array must contains enough redundancy to permit calibration of the unknown aperture phase errors,i.e.,the matrix of the array must be full rank with low condition number and lattice spacing to lead a unique solution.Then a novel RSC array configuration consists of twelve sub-aperture is proposed.Simulation results show that the matrix of the array with 21.317 7 condition number and 1/93 lattice spacing is satisfied the need and can be used in practice application.