共查询到18条相似文献，搜索用时 125 毫秒
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加拿大凤凰公司MTU系列大地电磁仪因其仪器轻便、数据采集稳定可靠等优点得到地球探测各行业的广泛应用,但其数据格式的特殊性,使得处理起来比较麻烦。目前,大多处理依赖该公司开发的SSMT-2000软件进行,这样不利于处理方法的改进以及应用。本文通过研究MTU系列仪器的数据文件格式,利用UltraEdit软件分析数据文件的结构以及规律,基于C#语言编写程序,对TBL、CLB、CLC以及TS文件进行分析与研究,将MTU系列仪器的数据文件从难以读懂的二进制文件转码为比较容易读懂的明码文件,提供了TBL参数文件的修改编辑模块、CLC、CLB文件的数据分析模块以及TS文件的转换模块,并应用该程序对野外实测数据进行了编辑。通过测试,程序可以进行TBL文件参数修改,CLB、CLC文件数据分析,TS文件转换,为研究此类二进制数据文件提供了新的思路和方法。 相似文献
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资料处理是大地电磁测深工作中的重要环节。在野外测量数据量大,并且要求相互做远参考处理的情况下,由于SSMT-2000大地电磁资料处理软件在批处理上的限制,室内资料处理的工作量巨大。为了提高工作效率,节约成本,通过研究SSMT-2000的参数文件格式、文件操作及内部模块调用方式,以MATLAB脚本语言为基础编写接口,实现了时间序列傅氏变换,单点阻抗张量ROBUST估计,固定测点或固定参考点的多点远参考阻抗张量RO—BUST估计以及多个测点相互远参考阻抗张量ROBUST估计的批量处理。采用批量处理,可为室内人员节省大量时间,更能为整个大地电磁测深工作节约资源。 相似文献
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杨凯 《物探化探计算技术》2023,(1):121-128
加拿大凤凰地球物理有限公司MTU系列大地电磁测深仪是国内大地电磁测深工作中较为常用的仪器,但是其特殊的时间序列数据格式让其后期分析处理较为不便,为了进一步分析研究时间序列为后续处理和反演工作提供便利,需要对时间序列文件进行读写操作。鉴于Python语言的众多优点,在充分掌握MTU系列大地电磁测深仪时间序列TSn文件存储格式的基础上,利用Python实现了TSn文件的读写操作和基于希尔伯特-黄变换的时频分析功能并编写了软件界面,为Python在大地电磁领域的进一步应用提供了参考。 相似文献
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top-hat变换与庐枞矿集区大地电磁强干扰分离 总被引：1，自引：0，他引：1
作为一种非线性信号处理方法,基于数学形态学的广义形态滤波已经展现出其在大地电磁时间域信号去噪中的作用;然而,广义形态滤波在滤除大地电磁时间域信号中噪声波形的同时,也滤除了时间域信号中包含有用信息的缓变化。针对这一问题,提出一种基于数学形态学top-hat变换的大地电磁时间域噪声压制方案,利用top-hat变换对波峰和波谷的检测能力,采用直线型结构元素,对大地电磁时间域信号进行去噪。用该方法对庐枞矿集区大地电磁实测数据进行处理后,数据的标准差与曲线相似性参数都优于处理前数据,表明所提方法能够去除噪声波形并保留时间域信号的缓变化,恢复受噪声污染的大地电磁时间域信号,提高大地电磁视电阻率曲线的质量。 相似文献
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为了实现天然源单分量大地电磁技术对水文地质条件的精细探测,系统分析了大地电磁信号采集和处理中存在的问题,研究了地下富水区在大地电磁波上的响应特征;根据大地电磁测深理论和层次分析法,建立了富水性指数模型;在大量实验数据的基础上,拟合波形和岩性的对应关系,从波形上分维提取岩层的介电常数、弹脆性、密度、空隙率等物性信息,按有利于岩层富水的原则赋值和归一化处理,纳入富水性指数模型进行多维度耦合计算,可得到相应深度的富水性指数值。富水性指数包含了丰富的岩层物性信息,增强了富水区在大地电磁波上的响应幅度,减小了天然场源强度变化对信号采集和识别的影响。根据富水性指数模型,利用现代计算机及通信技术,设计了双层阵列扫频式平行板电容传感器和大地电磁探水仪,并开发出了相应的数据处理程序,探测深度分辨率可达0.1 m,能够从庞杂的电磁信号中自动辨识来自深部的微弱信号,实现从时变性场源中采集信号并计算出相对稳定的富水性指数。经现场试验,仪器可清楚划分含水层和隔水层,识别富水区和微小导水通道。该技术在矿井水害防治、废弃采空区修复治理、注浆堵水、深部水文地质条件探测等工程中具有广阔的应用前景。 相似文献
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青藏及华北阵列式区域大地电磁场标准观测网建设方法与实验 总被引：2，自引：0，他引：2
大地电磁参数标准网的建设需要大量第一手的观测资料,观测资料的质量直接决定了标准网的可靠性。本文分析了大地电磁测深仪器设备、资料采集与处理技术,确定了青藏及华北阵列式区域大地电磁场标准观测网的建设方法;在此基础上,在山东菏泽地区对11535和11635号标准点进行了野外观测试验,对采集的宽频及长周期数据进行了深入处理,形成的对辅助测站和中心测站布置、数据采集时间、资料处理手段和远参考测站布设等要求,将指导青藏及华北阵列式区域大地电磁场标准网的建设,并对中国大陆其他区域大地电磁场标准网建设具有一定参考意义。 相似文献
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详细讨论了STRATAGEM(EH4)音频大地电磁测量系统资料处理过程中所隐含的重要步骤及其实现过程,特别是由时间序列资料经FFT变换后所产生的原始谱叠加后的频点与其相应的X文件(互功率谱文件)中的频点对应、归属与筛选问题,由X文件形成Z(阻抗)文件时X文件中频点与Z文件中频点的对应、归属与筛选问题。上述问题的解决,为相关研究人员利用该设备所采集资料而开发其他阻抗估算技术提供了基础。 相似文献
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TSP超前地质预报系统目前在我国已得到了比较广泛的应用,但厂家未提供其数据文件存储格式.为此,在举例说明TSP的应用效果后,笔者采用UltraEdit软件对多个TSP数据文件进行分析,弄清了其原始数据的总体存储结构.另外,还简单介绍了国际标准地震数据SEG-2文件的存储格式,并在Matlab语言环境下编制了读取SEG-2数据文件与TSP数据文件的程序,实现了将SEG-2文件转换成TSP数据文件的功能.因此,在今后的工作中可直接应用TSP的数据处理软件包TSPwin来处理国产的超前地震数据. 相似文献
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音频大地电磁测深,简称AMT(Audio Magnetotelluric),作为大地电磁勘探方法的一种,适用于中浅层地球物理勘查,探测深度一般在2 000m之内,是一种有效的地球物理勘探方法。但静态效应是电磁方法中较为棘手的一个问题,为数据资料的处理带来了极大地不便。这里简要阐述大地电磁方法基本原理和静态效应产生的机理,并对不同的静态校正技术进行论述。同时还介绍了该技术在黔西南卡林型金矿的具体应用及应用效果,结果表明,该技术较好地克服了静态效应所带来的影响。 相似文献
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Monitoring of extreme events requires accurate measurement of rainfall intensities and merging weather radar data with ground information is a very common technique used to obtain the required precision. In order to do this, several methods exist but very few open source implementations are available. CondMerg is the first open source software developed in R language implementing the conditional merging method and some other experimental variants based on it. It is a cross-platform software, easily adaptable to different needs, optimized for batch processing of multiple events but also usable in near real time applications. For its execution it requires two inputs: a CSV file with rain gauges measurements and a geo-referred TIF file with weather radar quantitative precipitation estimations; main outputs are TIF files with merged observations although the code also returns information about cross-validation, with scatter plots and indexes. All TIF files are ready to be managed by common GIS software for easy visualization and analysis. Use of the program is very simple: execution can be interactive or non-interactive and, in both cases, it just requires to set some parameters at the beginning of the program and run it. The code has been tested on different extreme rain events occurred in the Piedmont region (northwestern Italy) showing improved accuracy of reconstructed rainfall fields. 相似文献
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David J. Delene 《Earth Science Informatics》2011,4(1):29-44
The practice of conducting quality control and quality assurance in the construction of data sets is often an overlooked and
underestimated task of many research projects in the Earth Sciences. The development of software to effectively process and
quickly analyze measurements is a critical aspect of a research project. An evolutionary approach has been used at the University
of North Dakota to develop and implement software to process and analyze airborne measurements. Development over the past
eight years has resulted in a collection of software named the Airborne Data Processing and Analysis (ADPAA) package which
has been published as an open source project on Source Forge. The ADPAA package is intended to fully automate data processing
while incorporating the concept of missing value codes and levels of data processing. At each data level, ADPAA utilizes a
standard ASCII file format to store measurements from individual instruments into separate files. After all data levels have
been processed, a summary file containing parameters of scientific interest for the field project is created for each aircraft
flight. All project information is organized into a standard directory structure. ADPAA contains several tools that facilitate
quality control procedures conducted on instruments during field projects and laboratory testing. Each quality control procedure
is designed to ensure proper instrument performance and hence the validity of the instrument’s measurement. Data processing
by ADPAA allows edit files to be created that are automatically used to insert missing value codes into a time period that
had instrument problems. The creation of edit files is typically done after the completion of a field project when scientists
are performing quality assurance of the data set. Since data processing is automatic, preliminary data can be created and
analyzed within hours of an aircraft flight and a complete field project data set can be reprocessed many times during the
quality assurance process. Once a final data set has been created, ADPAA provides several tools for visualization and analysis.
In addition to aircraft data, ADPAA can be used on any data set that is based on time series measurements. The concepts illustrated
by ADPAA and components of ADPAA, such as the Cplot visualization tool, are applicable to areas of Earth Science that work
with time series measurements. 相似文献
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J. M. Richter 《Mathematical Geosciences》1983,15(2):371-384
A diverse set of computer programs has been developed at the Lawrence Livermore National Laboratory (LLNL)to process geophysical data obtained from boreholes. These programs support such services as digitizing analog records, reading and processing raw data, cataloging and storing processed data, retrieving selected data for analysis, and generating data plots on several different devices. A variety of geophysical data types are accommodated, including both wireline logs and laboratory analyses of downhole samples. Many processing tasks are handled by means of a single, flexible, general-purpose, data-manipulation program. Separate programs are available for processing data from density, gravity, velocity, and epithermal neutron logs. The computer-based storage and retrieval system, which has been in operation since 1973, currently contains over 4400 data files. Most of this data was obtained from the Nevada Test Site (NTS)in conjunction with the nuclear test program. Each data file contains a single geophysical parameter as a function of depth. Automatic storage and retrieval are facilitated by the assignment of unique file names that define the storage location of each data file. Files of interest to the user may be located and retrieved by means of a search program that examines the catalog. A convention recognized by all programs in the system is that of a zero ordinate denoting a gap in an otherwise continuous data trace. This convention provides a simple mechanism for editing and displaying data files in an automated and consistent manner. 相似文献