固体潮观测数据的滤波预处理方法  

FILTER PREPROCESSING METHOD FOR THE DATA OF EARTH TIDE

作　　者：李辉[1] 李瑞浩[1] 

机构地区：[1]国家地震局地震研究所

出　　处：《地壳形变与地震》1994年第1期23-31,共9页Crustal Deformation and Earthquake

摘　　要：本文提出了一种固体潮观测数据的预处理方法，组成了三组长度分别为４８小时、４４小时和５小时的滤波器，它们能够有效他们除固体潮观测小的所有潮汐和漂移成分，而只保留包括人为错误和环境干扰等引起的非规则畸变。利用它们对观测数据滤波后，根据统计原理可检测出错误数据和畸变。通过本文的工作，得到如下结论：（１）此方法计算简单，通用性强；（２）滤波值满足正态分布，（３）４８小时滤波器可实时计算作为资料判断标准的单位权方差且可估计资料段质量；（４）５小时滤波器对固体潮观测中几种典型的突跳方式（连续型、隔点型和孤立型）均有良好的检测和定位效果；（５）能检测出对调和分析结果有明显影响的含漂移畸变的资料段。ased on the filter and statistic principle,a preprocessing method for the data of earth tide is presented.Three filtere are constructed with the length of 48h、44h and 5h respectively,by which all the tides and drift can be completely eliminated but keep the jump and distortion produced by environment influence.Using them we can detect the misrecording and find the data sector affected by distortion.Based on our work, it is concluded as follows:(1) this method is simple and easy to operate,(2) filter is of normal distribution,(3) by use of the 48h filter the unit weighted variance can be calculated in real time and the quality of data can be estimated,(4) by use of the 5h filter the misrecording can be effectively found and located,(5) the data sector which significantly disturbs the harmonic results can be detected.

关 键 词：固体潮 观测数据 滤波处理 

分 类 号：P731.23[天文地球—海洋科学]