Title: Analysis of an Co-phasing detecting method based on far-field images of sparse-optical-synthetic-aperture system
Author(s): Liu, Z (Liu Zheng); Wang, SQ (Wang Sheng-Qian); Rao, CH (Rao Chang-Hui)
Source: ACTA PHYSICA SINICA Volume: 61 Issue: 3 Article Number: 039501 Published: FEB 2012 
Abstract: For the sparse-optical-synthetic-aperture telescope system, the co-phasing detection plays an important role for the realization of system's high resolution in solving out piston errors between sub-apertures. In this paper, the relationship between piston error and system's far-field intensity was analyzed based on physical principles, then the impact of piston error on system's far-field images was clarified theoretically. Furthermore, an innovative co-phasing detecting method based on the far-field images' similarity was approved for the hi-sub-aperture systems, with its feasibility, detecting deviation and dynamic range were researched by simulation. The results proved that, with this method, the piston error between the system's two sub-apertures can be soundly detected principally while immune from the problems of 2 pi ambiguity and direction decision that might exist within some other co-phasing detecting methods. Plus its dynamic range shown from these results, this new co-phasing detecting method provides effective references for deeper research of co-phasing detecting techniques.
Accession Number: WOS:000301008900079
IDS Number: 901ZR