东北黑土地作为我国粮食安全的命脉所在,具有重大战略意义。土壤有机质是黑土质量的核心评估指标,不仅能直接调控土壤肥力和作物生产力,同时在调节全球碳平衡和应对气候变化方面具有重要作用。在全球气候变暖的大背景下,气候格局的改变...东北黑土地作为我国粮食安全的命脉所在,具有重大战略意义。土壤有机质是黑土质量的核心评估指标,不仅能直接调控土壤肥力和作物生产力,同时在调节全球碳平衡和应对气候变化方面具有重要作用。在全球气候变暖的大背景下,气候格局的改变正成为影响黑土有机质发育过程的主要环境调控因子之一(刘驰等, 2022;Liu Kai et al., 2024)。展开更多
As an advanced device for observing atmospheric winds,the spaceborne Doppler Asymmetric Spatial Heterodyne(DASH)interferometer also encounters challenges associated with phase distortion,par-ticularly in limb sounding...As an advanced device for observing atmospheric winds,the spaceborne Doppler Asymmetric Spatial Heterodyne(DASH)interferometer also encounters challenges associated with phase distortion,par-ticularly in limb sounding scenarios.This paper discusses interferogram modeling and phase distortion cor-rection 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.展开更多
文摘东北黑土地作为我国粮食安全的命脉所在,具有重大战略意义。土壤有机质是黑土质量的核心评估指标,不仅能直接调控土壤肥力和作物生产力,同时在调节全球碳平衡和应对气候变化方面具有重要作用。在全球气候变暖的大背景下,气候格局的改变正成为影响黑土有机质发育过程的主要环境调控因子之一(刘驰等, 2022;Liu Kai et al., 2024)。
文摘As an advanced device for observing atmospheric winds,the spaceborne Doppler Asymmetric Spatial Heterodyne(DASH)interferometer also encounters challenges associated with phase distortion,par-ticularly in limb sounding scenarios.This paper discusses interferogram modeling and phase distortion cor-rection 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.
