搜索结果: 46-60 共查到“知识库 地磁学”相关记录390条 . 查询时间(2.275 秒)
Repeat station data compared to a global geomagnetic field model
Geomagnetic repeat station data crustal bias
2015/8/26
Geomagnetic repeat station surveys with local variometers for improved data reductions have been carried out in Germany for about ten years. For nearly the same time interval the satellites Ørste...
Italian Magnetic Network and magnetic reference fields at 2010.0
Earth's magnetic field Geomagnetic map Magnetic surveys Magnetic repeat stations Secular variation
2015/8/26
The Istituto Nazionale di Geofisica e Vulcanologia (INGV) has systematically undertaken the task of making measurements of the Earth's magnetic field in Italy. By tradition and because of the elongate...
Influence of solar activity on magnetic network measurements
Magnetic repeat stations Solar activity Magnetic models
2015/8/26
The influence of solar activity on magnetic measurements taken during the Italian repeat station surveys performed in 1999/2000 and 2009/2010 has been investigated. A method to estimate the difference...
The last Hungarian repeat station survey was completed between October 2010 and February 2011. Declination, inclination and the total field were observed using one-axial DMI fluxgate magnetometer moun...
On the crustal bias of repeat stations in Romania
Geomagnetic field Secular variation Repeat station network Romania
2015/8/26
A magnetic induction model has been applied to recordings obtained in 2010 during the field campaigns for geomagnetic measurements at the 26 repeat stations of the Romanian secular variation network. ...
The British Geological Survey is responsible for conducting the UK geomagnetic repeat station programme. Measurements made at the UK repeat station sites are used in conjunction with the three UK magn...
Croatian geomagnetic field maps for 2008.5 epoch
Geomagnetic networks Geomagnetic surveys Geomagnetic field Geomagnetic anomaly
2015/8/26
The status of the Croatian Geomagnetic Repeat Stations Network (CGRSN) and Croatian Geomagnetic Network for Field Mapping (CGNFM), completed in 2010, was described. Standard and new survey practices a...
Ukrainian geomagnetic repeat station network and results of the field work reduced to the epoch 2005.5
Earth's magnetic field Repeat station Secular variation Magnetic declination
2015/8/26
The results of geomagnetic field components of the renewed Ukrainian repeat stations (RS) network are presented. The methods of absolute geomagnetic and astro-geodetic measurements are described. The ...
Effects of solar and geomagnetic activities on the sub-ionospheric very low frequency transmitter signals received by the DEMETER micro-satellite
Solar and geomagnetic activities Pre-seismic electromagnetic emissions
2015/8/24
In the framework of seismic precursor electromagnetic investigations, we analyzed the very low frequency (VLF) amplitude signals recorded by the Instrument Champ Electrique (ICE) experiment on board t...
Large ionospheric disturbances during a minor geomagnetic storm on June 23,2000
Ionospheric storm Minor geomagnetic disturbance Energy transfer
2015/8/24
We investigate the variations in the ionosphere during a small geomagnetic storm on June 23, 2000, using the total electron content of the Jet Propulsion Laboratory global positioning system, and the ...
Repeat-station surveys: implications from chaos and ergodicity of the recent geomagnetic field
Magnetic repeat stations Chaos Ergodicity
2015/8/18
The present geomagnetic field is chaotic and ergodic: chaotic because it can no longer be predicted beyond around 6 years; and ergodic in the sense that time averages correspond to phase-space average...
Demagnetization Analysis in Excel (DAIE). An open source workbook in Excel for viewing and analyzing demagnetization data from paleomagnetic discrete samples and u-channels
paleomagnetism software Excel
2015/8/18
The Demagnetization Analysis in Excel (DAIE) software is a single Microsoft Excel file designed for viewing and analyzing stepwise demagnetization data of both discrete and u-channel samples in paleom...
Geology and geophysics at the archeological park of Vulci (central Italy)
Vulci Archeological Park Geological survey Electrical resistivity tomography Magnetic susceptibility
2015/8/17
The Vulci archeological site was object of interest by the Soprintendenza ai beni culturali dell’Etruria meridionale (Italian government department responsible for southern Etruria’s cultural heritage...
大地电磁的人工鱼群最优化约束反演
人工鱼群 约束反演 非线性
2015/7/27
大地电磁的反演问题是非线性,如果采用线性反演方法容易陷入局部极小,使得反演结果非唯一性严重.本文将人工鱼群算法引入到地球物理反演之中,提出了非线性的大地电磁人工鱼群最优化反演.该方法不需要进行偏导数的求取,可以对反演的范围进行约束,以减小反演结果的非唯一性.同时我们对搜索步长进行了改进,给出适用于大地电磁反演的人工鱼群参数.大量的理论数据试算表明,人工鱼群反演算法能够较好地寻找到全局最优解.实测数...