地震地磁观测与研究2024，Vol.45Issue(2)：52-59,8.DOI:10.3969/j.issn.1003-3246.2024.02.007
基准地磁台选定基线值约束方法研究
Research on the constraint method for selecting baseline values of reference geomagnetic stations
摘要
Abstract
The Technical Rules for the Operation and Management of Geomagnetic Station Networks and the Measures for the Quality Evaluation of Electromagnetic Observation Data have no constraints or regulations on the selection of absolute observation baseline values for reference geomagnetic stations,which makes it difficult for observation personnel to rely on them when selecting baseline values,which can easily lead to errors in baseline values and affect absolute values.There are two constraint methods for selecting baseline values:① Direct constraint method(selected baseline value constraint),which involves baseline value preprocessing,temperature drift elimination,"2σ"criterion,and other methods to achieve constraints and judgments on the selected baseline values,with an effective judgment rate of over 60%;②Indirect constraint method(absolute value constraint),that is,through absolute value preprocessing,setting a baseline,introducing concepts and algorithms such as"Dixon criterion"and"outlier value",to realize automatic judgment of abnormal absolute values and directly determine baseline values.This constraint method reduces the error rate of baseline values and improves data quality.关键词
地磁/基准地磁台/绝对观测/基线值/约束方法Key words
geomagnetism/reference geomagnetic station/absolute observation/baseline value/constraint method引用本文复制引用
古云飞,黄好,贺巍,黄英..基准地磁台选定基线值约束方法研究[J].地震地磁观测与研究,2024,45(2):52-59,8.基金项目
中国地震局监测、预报、科研三结合课题(项目编号:3JH-202301075) （项目编号:3JH-202301075）
