Improve Spatiotemporal Kriging with Magnitude and Direction Information in Variogram Construction  

作　　者：CHEN Dingxin LIU Daizhi LI Yihong MENG Liang YANG Xiaojun 

机构地区：[1]PLA Rocket Force Engineering University, Xi'an 710025, China

出　　处：《Chinese Journal of Electronics》2016年第3期527-532,共6页电子学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.41374154,No.61304240)

摘　　要：Magnitude information and direction information are utilized to improve the spatiotemporal Kriging method in the step of variogram construction. Basement of spatiotemporal variogram construction is to calculate vector distance between time slices, and space slices. Criterions of vector distance to spatiotemporal variogram construction is discussed, and a new vector distance model considering both magnitude and direction information is proposed. Case study using data from National Network of Geomagnetic Observatories of China is carried out for cross validation. Results illustrate that the proposed model performs better in analyzing in the statistics of Mean absolute error(MAE) and Mean square error(MSE). The accuracy of spatiotemporal Kriging interpolation is improved with such an operation in vector distance.Magnitude information and direction information are utilized to improve the spatiotemporal Kriging method in the step of variogram construction. Basement of spatiotemporal variogram construction is to calculate vector distance between time slices, and space slices. Criterions of vector distance to spatiotemporal variogram construction is discussed, and a new vector distance model considering both magnitude and direction information is proposed. Case study using data from National Network of Geomagnetic Observatories of China is carried out for cross validation. Results illustrate that the proposed model performs better in analyzing in the statistics of Mean absolute error（MAE） and Mean square error（MSE）. The accuracy of spatiotemporal Kriging interpolation is improved with such an operation in vector distance.

关 键 词：Spatiotemporal Kriging Variogram Vector distance criterions Vector directional filters 

分 类 号：P628[天文地球—地质矿产勘探] O212.1[天文地球—地质学]