共查询到18条相似文献，搜索用时 109 毫秒
1.
地磁观测中干扰抑制方法的发展及展望 总被引：1，自引：0，他引：1
地磁观测数据不仅具有学术研究意义,也是不可或缺的国家基础战略资源.但是,目前我国地磁台网中近1/3地磁台站正日益受到由外界人工电磁干扰源的干扰,产出的地磁观测数据质量下降.如何选用合适的技术方法对干扰进行辨识是目前地磁台网运行中数据处理的热点和难点.基于此本文从地磁观测数据中分析及抑制方法中遇到的主要问题入手,对现代信号处理技术在地磁数据分析及干扰抑制方面的应用进行归纳总结,作为现代信号处理的演化的新方向,介绍了智能信息处理理论中数据融合、数据挖掘等技术在地磁数据分析方法的发展及展望中谈及.研究发现,智能信息处理是地磁数据中干扰辨识及抑制领域有效技术和今后发展趋势,也是地磁观测数据综合处理中值得借鉴和学习的有效技术之一. 相似文献
2.
国内外地磁台网观测能力评估 总被引：3，自引：0，他引：3
为了解中国地震局地磁台网的观测能力与国际上发达国家之间的优势和差距,本文从固定地磁台站和科学观测台阵两个方面对国内外地磁台网做了一个横向对比。结果表明,中国东部固定地磁台站的观测能力已达到国际先进水平,中国西部还需加强固定地磁台站的建设,而科学观测台阵也需在一些方面继续加强。 相似文献
3.
从国际地磁台站分布、地磁信息节点分布、地磁观测技术指标、数据产品及服务应用等5个方面介绍了国际地磁台网的发展现状。通过综合分析,得出地磁场和空间环境的全球性精细化监测及预报已经成为地球科学家关注的焦点。在此基础上,从4个方面预测了国际地磁台网未来发展趋势,以期为我国开展相关工作提供参考和借鉴。 相似文献
4.
地磁台站和地磁台网的现代化技术专辑 总被引：2，自引：0，他引：2
地磁观测资料在地磁学，空间物理学，固体地球物理学及其它相关领域的研究和应用中具有十分重要的作用，资料质量对研究工作有重要影响，台网资料对研究工作有特殊意义，根据作者近年来学习、研究和实践的结果，本文第一部分从系统设计的角度就地磁台站现代化中的系统组成，功能，仪器和主要技术指标，台网建设，资料质量等问题进行了讨论，本文的第二部分介绍了世界地磁台网，包括ＩＮＴＥＲＭＡＧＮＥＴ的目标，历史，现状，原则， 相似文献
5.
数字地磁台站质量控制 总被引：1，自引：1，他引：0
针对电磁学科对数字地磁台站的运行管理要求,结合中国地震前兆台网数据处理系统V1.5,解读台站日常数据处理质量控制流程,分析台站日常工作中的注意事项及技巧. 相似文献
6.
张创军 《地震地磁观测与研究》1999,20(3):62-64
ＤＣＴＺ地磁台站数据处理系统是由陕西省地震局乾陵地震台和全国地磁基本台网技术管理组合作研制的、适用于地磁台站日常工作的处理软件。是在原来地磁数据库的基础上重新设计完成的。ＤＣＴＺ系统根据地磁台站的日常工作情况,针对原数据库系统用ｄＢＡＳＥⅢ语言编写,... 相似文献
7.
引言地磁资料能反映从空间到地球深部的介质变化 ,已经被广泛应用于空间物理和地球内部构造运动的研究 ,从而进行空间探索和地震等灾害预报。近年来 ,随着科学技术的发展 ,地磁资料的应用领域不断扩展 ,应用质量明显提高 ,地磁资料已被用于军事 ,航天航海 ,精确探矿 ,环境保护 ,生物研究 ,大型输电设施保护等。地磁资料获取的重要来源之一是长期定点观测的地磁台站。发达国家已在自己国内建立了完整的地磁观测网。由于地磁场变化的全球性 ,他们已开始建设覆盖全球的地磁观测台网 ,特别是在占地球表面 70 %的海域。所有台站装备了高精度、高… 相似文献
8.
海洋半球计划(OHP)台网是一个覆盖以前观测密度低的西太平洋区域的地球物理观测台网。该台网是集地震、GPS、地磁和超导重力观测于一体的台网。联合使用该台网与以前所建台网的资料，我们可得到全球台站更均匀分布的台站资料。为了使用户充分受益，数据交换应是首先考虑的问题。 相似文献
9.
关于数字地磁台站观测系统的发展与观测资料应用的一点思考 总被引：1，自引：0，他引：1
针对地球科学和国家建设对地磁观测与研究的需求，结合“九五”地磁台站观测技术数字化改造，对地磁台站观测系统的发展及数字观测资料的应用提出了一些见解。 相似文献
10.
前兆台网观测数据跟踪分析工作在前兆台站和区域中心全面展开。地震前兆数据跟踪分析产出的事件记录,展现了前兆台网观测数据的动态变化情况。本文从地磁学科数据跟踪分析的现状出发,提出该学科数据跟踪分析注意事项,并通过事件分析缺时段和过度分析、数据类型选择、事件起止时间、事件分析描述、图件绘制与标注、事件类型分类及地球物理事件分析等多个方面,对地磁跟踪分析中常见问题进行讨论,提出相应解决方案,最后针对地磁学科数据跟踪分析的推进工作提出措施。希望为地磁台站观测人员更好地开展数据分析研究及产出应用工作提供参考和借鉴,为地磁学科的预测预报与科学研究提供坚实基础,推进地震前兆台网日常工作重心从观测为主,向观测、应用并重转变。 相似文献
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12.
The results of the analysis of geomagnetic data synchronously recorded by the INTERMAGNET magnetic stations are presented. The goal of this research was to distinguish internal correlations between the data and to determine the optimal spatial interval of the geographical coordinates within which the efficient operation of only one magnetic observatory would be satisfactory in most occasions. The results of the observation of correlations between the geomagnetic data on a global scale are summarized and presented. Possible regions of application of these results are determined. 相似文献
13.
The IAGA-2002 1-min geomagnetic time series published by the International Real-time Magnetic Observatory Network (INTERMAGNET) are considered. Their completeness and anomalies are analyzed. The concept of the relative informational efficiency index is introduced. Theory elements are developed for its qualitative and quantitative assessment. Time series of geomagnetic data published by INTERMAGNET for 2014–2017 are used to find the range for the determination of this index and its basic statistical characteristics. An approach to the classification of INTERMAGNET magnetic observatories by the relative informational efficiency index is proposed. The nature of the geospatial distribution of the appropriate classes of magnetic observatories is investigated. 相似文献
14.
国际地磁台网计划INTERMAGNET 总被引：1，自引：1，他引：1
本文介绍了国际地磁台网计划（INTERMAGNET）的目的、意义、提出、发展过程及未来趋势，强调指出它对地磁台站现代化建设，地磁学研究，地球物理学发展以及空间天气预报的影响及作用．地磁场和空间环境的全球性质越来越迫切地要求各国学术团体和组织进行大规模国际合作，而作为地学研究的基础—台站建设与观测，资料收集与交换，资源共享与扩展—更应成为地球科学家关心的重要问题与焦点。 相似文献
15.
Application of the SP algorithm to the INTERMAGNET magnetograms of the disturbed geomagnetic field 总被引：1，自引：0，他引：1
R. V. Sidorov A. A. Soloviev Sh. R. Bogoutdinov 《Izvestiya Physics of the Solid Earth》2012,48(5):410-414
The algorithmic system developed in the Laboratory of Geoinformatics at the Geophysical Center, Russian Academy of Sciences, which is intended for recognizing spikes on the magnetograms from the global network INTERMAGNET provides the possibility to carry out retrospective analysis of the magnetograms from the World Data Centers. Application of this system to the analysis of the magnetograms allows automating the job of the experts-interpreters on identifying the artificial spikes in the INTERMAGNET data. The present paper is focused on the SP algorithm (abbreviated from SPIKE) which recognizes artificial spikes on the records of the geomagnetic field. Initially, this algorithm was trained on the magnetograms of 2007 and 2008, which recorded the quiet geomagnetic field. The results of training and testing showed that the algorithm is quite efficient. Applying this method to the problem of recognizing spikes on the data for periods of enhanced geomagnetic activity is a separate task. In this short communication, we present the results of applying the SP algorithm trained on the data of 2007 to the INTERMAGNET magnetograms for 2003 and 2005 sampled every minute. This analysis shows that the SP algorithm does not exhibit a worse performance if applied to the records of a disturbed geomagnetic field. 相似文献
16.
Sh. R. Bogoutdinov A. D. Gvishiani S. M. Agayan A. A. Solovyev E. Kin 《Izvestiya Physics of the Solid Earth》2010,46(11):1004-1016
The International Real-time Magnetic Observatory Network (INTERMAGNET) is the world’s biggest international network of ground-based
observatories, providing geomagnetic data almost in real time (within 72 hours of collection) [Kerridge, 2001]. The observation
data are rapidly transferred by the observatories participating in the program to regional Geomagnetic Information Nodes (GINs),
which carry out a global exchange of data and process the results. The observations of the main (core) magnetic field of the
Earth and its study are one of the key problems of geophysics. The INTERMAGNET system is the basis of monitoring the state
of the Earth’s magnetic field; therefore, the information provided by the system is required to be very reliable. Despite
the rigid high-quality standard of the recording devices, they are subject to external effects that affect the quality of
the records. Therefore, an objective and formalized recognition with the subsequent remedy of the anomalies (artifacts) that
occur on the records is an important task. Expanding on the ideas of Agayan [Agayan et al., 2005] and Gvishiani [Gvishiani
et al., 2008a; 2008b], this paper suggests a new algorithm of automatic recognition of anomalies with specified morphology,
capable of identifying both physically- and anthropogenically-derived spikes on the magnetograms. The algorithm is constructed
using fuzzy logic and, as such, is highly adaptive and universal. The developed algorithmic system formalizes the work of
the expert-interpreter in terms of artificial intelligence. This ensures identical processing of large data arrays, almost
unattainable manually. Besides the algorithm, the paper also reports on the application of the developed algorithmic system
for identifying spikes at the INTERMAGNET observatories. The main achievement of the work is the creation of an algorithm
permitting the almost unmanned extraction of spike-free (definitive) magnetograms from preliminary records. This automated
system is developed for the first time with the application of fuzzy logic system for geomagnetic measurements. It is important
to note that the recognition of time disturbances is formalized and identical. The algorithm presented here appreciably increases
the reliability of spike-free INTERMAGNET magnetograms, thus increasing the objectivity of our knowledge of the Earth’s magnetic
field. At the same time, the created system can accomplish identical, formalized, and retrospective analysis of large archives
of digital and digitized magnetograms, accumulated in the system of Worldwide Data Centers. The relevant project has already
been initiated as a collaborative initiative of the Worldwide Data Center at Geophysical Center (Russian Academy of Sciences)
and the NOAA National Geophysical Data Center (Unite States). Thus, by improving and adding objectivity to both new and historical
initial data, the developed algorithmic system may contribute appreciably to improving our understanding of the Earth’s magnetic
field. 相似文献
17.
为实现地磁台站场地勘选指标的快速计算和勘选报告的在线保存与查询,提高地磁台站勘选数据处理效率,降低人工处理数据错误率,在现有地磁数据处理软件功能的基础上设计开发地磁台站勘选数据处理系统,以提高勘选的工作效率。 相似文献
18.
Igor Mandić Eugen Vujić Balázs Heilig Izidor Pelajić Davorka Herak 《Acta Geophysica》2016,64(5):1311-1339
More than ten years ago, the Geophysical Institute initiated the installation of a geomagnetic observatory in Croatia. Over the past decade, extensive surveys and studies have been conducted in order to determine the proper location for the observatory. Finally, in 2012, the observatory was established in Lonjsko Polje. This paper presents the first data recorded in the period 2012.5-2015.0. Also presented are the technical aspects and data processing techniques of this remotely operated observatory. Analysis of data quality and comparison with data from the surrounding INTERMAGNET observatories is discussed in detail. Although remote observatories cannot provide the ideal environment for magnetometers, the obtained results accentuate the potential of the new observatory to provide high-quality data. The establishment of this observatory paves the way for scientific and professional development of geomagnetism in Croatia. 相似文献