Specialized Algorithms for Tomographic Reconstruction of Electron Density Distributions in the Ionosphere

电离层电子密度分布层析重建的专用算法

基本信息

批准号：
9211708
负责人：
Helen Na
金额：
$ 1.8万
依托单位：
University of Iowa
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1993
资助国家：
美国
起止时间：
1993-02-01 至 1995-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9211708&HistoricalAwards=false
关键词：
Specialized Algorithms Tomographic Reconstruction Electron

项目摘要

Ionospheric tomography is a new and innovative method for two- dimensional reconstruction of distribution in the ionosphere. Reconstructing high resolution images of electron density distributions would allow communication systems to compensate for the irregularities in these distributions which cause significant interference. Accurate images of these irregularities would also assist in the determination of their origins. Previously, remote sensing techniques were limited to measuring these distributions integrated over a path, or at individual locations. Current reconstruction techniques are based upon x-ray tomography algorithms which are not well-suited for ionospheric tomography due to the geometry of the data acquisition system. The differences between these systems cause considerable resolution degradation in the reconstructed images. This proposal is for preliminary studies in the development of specialized algorithms for ionospheric tomography. Substantial a priori information on the formation of these distributions is available and ionosonde measurements provide accurate values at specific locations. This a priori information can be used in specialized algorithms to compensate for the geometric limitations of the data acquisition system. The program of research would be for 18 months from the start of the project. Upon completion of preliminary investigations, a full-scale research proposal would be developed.

电离层层析成像是一种用于二维重建电离层分布的创新方法。重建电子密度分布的高分辨率图像将使通信系统能够补偿这些分布中造成严重干扰的不规则性。这些不规则现象的准确图像也将有助于确定其起源。以前，遥感技术仅限于测量在一条路径上或在各个位置集成的这些分布。当前的重建技术基于 X 射线断层扫描算法，由于数据采集系统的几何形状，该算法不太适合电离层断层扫描。这些系统之间的差异导致重建图像的分辨率显着下降。该提案用于电离层层析成像专用算法开发的初步研究。关于这些分布的形成的大量先验信息是可用的，并且电离探空仪测量可以提供特定位置的准确值。该先验信息可用于专门的算法中，以补偿数据采集系统的几何限制。研究计划自项目开始起为期 18 个月。初步调查完成后，将制定全面的研究计划。