journal6 ›› 2013, Vol. 34 ›› Issue (5): 49-52.DOI: 10.3969/j.issn.1007-2985.2013.05.012

• 气象 • 上一篇    下一篇

基于正交多项式拟合的气象数据处理方法

 孙宝京   

  1. (沈阳炮兵学院电子侦察系,辽宁 沈阳110867)
  • 出版日期:2013-09-25 发布日期:2013-11-04
  • 作者简介:孙宝京(1968-),男,山东五莲人,沈阳炮兵学院教授,主要从事弹道气象学研究.

Piecewise Curve Fitting Method of Processing Meteorological Data Based on the Orthogonal Polynomial

 SUN  Bao-Jing   

  1. (Department of Electronic Reconnaissance,Shenyang Artillery Academy,Shenyang 110867,China)
  • Online:2013-09-25 Published:2013-11-04

摘要:针对高空气象探测数据变化规律复杂、突变情况不可预测、数据量大等特点,提出了基于离散数据正交多项式最小二乘的分段拟合方法.首先,从计算稳定性角度,说明了采用离散数据的正交多项式最小二乘法的原因;其次,从曲线拟合的保形性角度,详细阐述了二次分段拟合原则;最后,以具有典型特征的气温探测数据为例,证明了采用基于离散数据正交多项式最小二乘的分段拟合方法能够获得明显优于传统内插方法的拟合精度,提高高空气象探测数据处理的精度和自动化处理程度.

关键词: 离散数据, 正交多项式, 最小二乘, 分段拟合, 气象探测

Abstract: In accordance with the characterics of the large number and complex and unpredicted trend on change of the meteorological detecting data,the piecewise curve fitting method based on the least squares of orthogonal polynomial for scattered data is presented.Firstly,the reason of using the least squares of orthogonal polynomial for scattered data is introduced from the respect of the stability of data processing.Secondly,the principle of twice piecewise curve fitting is set out in detail from the respect of the shape preserving feature of curve fitting.Finally,as the temperature detecting data for example,it is proved clearly that the twice piecewise curve fitting method can make much better fitting precision than the traditional interpolation method,and improve the level of precision and automation of the meteorological detecting data processing.

Key words: scattered data, orthogonal polynomial, least squares, piecewise curve fitting, meteorological detecting

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