微波辐射计全链路仿真软件接口设计与实现

发布时间：2018-01-08 00:33

本文关键词：微波辐射计全链路仿真软件接口设计与实现　出处：《华中科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：综合孔径微波辐射计是海洋盐度遥感的一种新型遥感设备,能够有效地提高被动微波海洋盐度遥感的空间分辨率,具有十分重要的应用价值。为了将综合孔径辐射计这一新兴测量设备更好地应用于海洋盐度遥感中,综合孔径辐射计海洋盐度遥感全链路系统仿真是一种重要的研究手段。基于综合孔径辐射计的被动微波遥感全链路仿真系统由三部分组成:①正演产生输入亮温场景;②综合孔径辐射计系统仿真;③盐度参数反演。在全链路仿真系统设计中,子系统①和②之间涉及到一个关键的接口问题:对于已知大小的场景,如何根据场景的角度范围正确划分场景像素点,以保证综合孔径辐射计能够重建出更精确的亮温图像。上述接口问题可以归结为场景划分的问题,这个问题的解决正是本文的主要工作。本文首先对综合孔径辐射计应用于海洋盐度遥感的原理进行了较为全面的介绍,然后对基于综合孔径辐射计的海洋盐度遥感全链路仿真软件方案进行了详细描述,该软件能实现从海洋盐度正演模型到应用反演的整个盐度遥感测量过程的仿真。在原理和仿真软件介绍的基础上,重点介绍亮温场景数据三种空间划分方式(方向余弦均分、面积均分、角度均分)的实现原理,给出仿真分析实例。最后通过不同类型场景的仿真结果对比分析三种空间划分方式对综合孔径辐射计亮温测量精度的影响。仿真分析结果显示,按照方向余弦均分输入亮温场景,综合孔径辐射计能够实现最高的亮温测量精度。
[Abstract]:Synthetic aperture microwave radiometer is a new remote sensing device for marine salinity remote sensing, which can effectively improve the spatial resolution of passive microwave ocean salinity remote sensing. It has very important application value. In order to apply the synthetic aperture radiometer which is a new measuring equipment to ocean salinity remote sensing better. Ocean salinity remote sensing full-link system simulation of synthetic aperture radiometer is an important research method. Passive microwave remote sensing full-link simulation system based on synthetic aperture radiometer consists of three parts:. (1) forward modeling produces input bright temperature scene; (2) system simulation of synthetic aperture radiometer; 3 salinity parameter inversion. In the design of the whole link simulation system, a key interface problem between subsystem 1 and 2 is involved: for scenarios of known size. How to correctly divide the scene pixels according to the angle range of the scene so as to ensure that the synthetic aperture radiometer can reconstruct a more accurate bright temperature image. The above interface problem can be reduced to the problem of scene partition. The solution to this problem is the main work of this paper. Firstly, the principle of applying synthetic aperture radiometer to ocean salinity remote sensing is introduced comprehensively in this paper. Then the simulation software scheme of ocean salinity remote sensing whole link based on synthetic aperture radiometer is described in detail. The software can realize the simulation of the whole salinity measurement process from the forward modeling of ocean salinity to the inversion of the whole salinity measurement process, based on the introduction of the principle and simulation software. This paper mainly introduces the realization principle of three spatial partitioning methods of bright temperature scene data (direction cosine mean, area mean, angle average). Finally, through the simulation results of different kinds of scenes, the effect of three space partition methods on the precision of measuring the brightness temperature of the synthetic aperture radiometer is analyzed. The simulation results show that. According to the direction cosine average input bright temperature scene, the synthetic aperture radiometer can achieve the highest brightness temperature measurement accuracy.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P716.14

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