利用矩量法分析北极气象卫星辐射计的溢出分析和主光束特征

IF 3.5 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Roland Albers;Mustafa Murat Bilgic;Karl-Erik Kempe;Alistair Bell;Axel Murk
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引用次数: 0

摘要

北极气象卫星(AWS)是一项单仪器飞行任务,包括一个在 54、89、183 和 325 千兆赫波段工作的微波探测仪。该仪器的光学设计包括一个直接照射到串行扫描镜的馈电簇,使仪器保持紧凑。由于光学结构简单,光束没有共同对准,也没有任何光束位于扫描镜的焦点上,从而导致光束发散、不对称和扫描角度相关的溢出变化。利用矩量法 (MoM) 模拟光学和仪器结构,可以模拟高达 183 GHz 的完整远场球。本文详细分析了主波束的溢出、波束发散以及物理光学、MoM 和近场天线测量的相互比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spillover Analysis and Mainbeam Characterisation of Arctic Weather Satellite Radiometer Using Method of Moments
The Arctic Weather Satellite (AWS) is a single instrument mission consisting of a microwave sounder operating in the 54, 89, 183 and 325 GHz bands. The optical design of the instrument consists of a feedcluster directly illuminating a crosstrack scanning mirror, keeping the instrument compact. Due to the simple optics, the beams are not co-aligned and none are in the scanning mirror focal point, leading to beam divergence, asymmetry and scan angle dependent variations in spillover. Using Method of Moment (MoM) simulations of the optics as well as instrument structure, the complete farfield sphere of the instrument can be simulated up to 183 GHz. This paper contains detailed analysis of spillover, beam divergence and intercomparison of physical optics, MoM and nearfield antenna measurements for the mainbeam.
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来源期刊
CiteScore
6.50
自引率
12.50%
发文量
90
审稿时长
8 weeks
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