空间水汽场重建算法对比研究Comparative study on spatial water vapour field reconstruction algorithms
何林,柳林涛,刘金钊,段鹏硕
摘要(Abstract):
GPS水汽探测可精确获取某点处的水汽数据,但实际应用中所需多是空间水汽场数据,因此有必要研究如何利用点位水汽数据来重建空间水汽场。文章探讨了反距离权重法、样条函数法、克里格法等常见空间插值算法在空间水汽场重建中的应用,并用交叉验证法对结果进行比较分析,试验结果表明克里格法最优。本文还利用DEM辅助重建空间水汽场,探讨了协同克里格法、泛克里格法等算法,并用Onn模型和高度归算法对克里格模型进行改进。交叉验证结果表明利用DEM辅助重建空间水汽场效果明显,基于Onn模型改进的泛克里格算法最优,其次是基于高度归算法的克里格模型。
关键词(KeyWords): 地统计学;空间水汽场;克里格法;DEM
基金项目(Foundation): 国家自然科学基金(41021003);; 大地测量与地球动力学国家重点实验室开放基金(SKLGED2013-4-3-E)
作者(Author): 何林,柳林涛,刘金钊,段鹏硕
DOI: 10.16251/j.cnki.1009-2307.2014.10.003
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