分类： 天文学 >> 天文学 分类： 地球科学 >> 大地测量学 提交时间： 2024-02-05
摘要： LR polarization is commonly used for the corresponding geophysical parameters retrieval in GNSS#2; R(Global Navigation Satellite System-Reflectometry) or SoOP-R (Signal of Opportunity-Reflectometry) . However, the other polarization of the reflected signals has attracted more and more attention with the development . The popular used equation for RR polarization demonstrates that it decreases as the soil moisture content increase and this is in contradiction with the experiment data. Here, three new models have been developed: Spec4PolR (Specular reflectivity model for polarization GNSS#2; R), SPM4Pol (small perturbation model for polarization GNSS#2; R), and Umich4Pol (Umich model for polarization GNSS-R). The Mueller matrix of these three models has been presented and the wave synthesis technique is employed to calculate the reflectivity at RR polarization. Spec4polR employs only three elements in the Mueller matrix for the final reflectivity, while five elements for Umich4polR participate in the calculation and although all the elements of the SPM4Pol have constructed the Mueller matrix and only nine elements have been employed for calculation. Each elements' effects on the soil moisture content are presented and the final reflectivity at RR polarization has been illustrated. However, due to the simple formulations of Spec4Pol, its reflectivity at RR polarization still decreases as the soil moisture content increase. while the results of SPM4Pol and Umich4Pol are consistent with the measured data and the reflectivity at RR polarization increase as the soil moisture content increase. The accurate forward calculation of RR polarization is crucial for the subsequent retrieval algorithm of polarization GNSS-R/SoOP-R.
分类： 管理学 >> 管理学其他学科 提交时间： 2022-11-21 合作期刊: 《2022年第三届传播、创新和经济管理国际研讨会》
摘要： This study analyzes the reasons for users' ambiguous perceptions of the Metaverse from the perspective of the cognitive base model, based on the public's understanding of the concept of Metaverse, and the intrapersonal communication direction from the audience's perspective. This study analyses the relationship between audience satisfaction and the cognitive schema of Metaverse, and initially explores the relationship between the audience's own cognitive level and the cognition of Metaverse, as well as the influence of audience access channels on the degree of metaverse cognition. We found that when the Metaverse can satisfy certain needs of the audience, it can make the audience further understand the new concept of Metaverse; At the same time, the future development direction of the Metaverse should be closer to the needs of the audience's life.
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