| Citation: | PEI Hui-yi, JIANG Lun, WANG Jin-jiang, CUI Yong, FANG Yuan-xiang, ZHANG Jia-ming, CHEN Ci. Phase distortion correction of fringe patterns in spaceborne Doppler asymmetric spatial heterodyne interferometry[J]. Chinese Optics. doi: 10.37188/CO.EN-2024-0007
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As an advanced technology for observing atmospheric winds, the spaceborne Doppler Asymmetric Spatial Heterodyne (DASH) interferometer also encounters challenges associated with phase distortion, particularly in limb sounding scenarios. This paper discusses interferogram modeling and phase distortion correction techniques for spaceborne DASH interferometers. The modeling of phase distortion interferograms with and without Doppler shift for limb observation was conducted, and the effectiveness of the analytical expression was verified through numerical simulation. The simulation results indicate that errors propagate layer by layer while using the onion-peeling inversion algorithm to handle phase-distorted interferograms. In contrast, the phase distortion correction algorithm can achieve effective correction. This phase correction method can be successfully applied to correct phase distortions in the interferograms of the spaceborne DASH interferometer, providing a feasible solution to enhance its measurement accuracy.
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