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首页> 外文期刊>Earth, planets and space: EPS >Two geomagnetic regional models for Albania and south-east Italy from 1990 to 2010 with prediction to 2012 and comparison with IGRF-11
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Two geomagnetic regional models for Albania and south-east Italy from 1990 to 2010 with prediction to 2012 and comparison with IGRF-11

机译：1990年至2010年阿尔巴尼亚和意大利东南部的两个地磁区域模型，并预测到2012年与IGRF-11进行比较

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Here we present a revised geomagnetic reference model for the region comprising Albanian territory, south-east part of Italian Peninsula and Ionian Sea from 1990 to 2010 with prediction to 2012. This study is based on the datasets of magnetic measurements taken during different campaigns in Albania and Italy in the time of concern, together with a total intensity data set from the ?rsted and CHAMP satellite missions. The model is designed to represent the Cartesian components, X, Y, Z and the total intensity F of the main geomagnetic field (and its secular variation SV) for the period of interest. To develop the model, we applied a Spherical Cap Harmonic Analysis (SCHA) of the geomagnetic potential over a 16° cap with most of the observations concentrated in the central 4° half-angle. The use of a larger cap than that containing the data was made to reduce the typical problems in SV modelling over small regions. Also a new technique, called "Radially Simplified Spherical Cap Harmonic Analysis" (RS-SCHA), was developed to improve the model especially in the radial variation of the geomagnetic field components. Both these models provide an optimal representation of the geomagnetic field in the considered region compared with the International Geomagnetic Reference Field model (IGRF-11) and can be used as reference models to reduce magnetic surveys undertaken in the area during the time of validity of the model, or to extrapolate the field till 2012.
机译：在此，我们为1990年至2010年的阿尔巴尼亚领土，意大利半岛东南部地区和爱奥尼亚海提供了一个经过修订的地磁参考模型，并预测了到2012年。该研究基于阿尔巴尼亚不同战役期间进行的磁测量数据集在关注之时，还有来自意大利和意大利，以及来自弗斯特德和CHAMP卫星任务的总强度数据集。该模型旨在表示感兴趣期间的笛卡尔分量X，Y，Z和主要地磁场的总强度F（及其长期变化SV）。为了开发该模型，我们对16°顶上的地磁势进行了球冠谐波分析（SCHA），大部分观测值集中在中心4°半角上。使用了比包含数据更大的上限，以减少小区域SV建模中的典型问题。还开发了一种称为“径向简化球冠谐波分析”（RS-SCHA）的新技术来改善模型，尤其是在地磁场分量的径向变化方面。与国际地磁参考场模型（IGRF-11）相比，这两种模型都提供了所考虑区域中地磁场的最佳表示，并且可以用作参考模型，以减少在有效期内在该地区进行的磁测量。模型，或推断该领域直到2012年。

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