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The Spatial and Temporal Characteristics of Pc3 Geomagnetic Activity over Canada in 2000, as a Guide to Planning the Times of Aeromagnetic Surveys

机译:加拿大2000年Pc3地磁活动的时空特征,作为规划航空勘测时间的指南

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摘要

Geomagnetic activity affects aeromagnetic surveys. Geomagnetic variations are quite complex and can be quantified in different ways. A measure of geomagnetic activity that is useful for planning aeromagnetic surveys is the Pc3 pulsation index developed by the Australian Space Weather Agency. Purposeful to developing guidelines for planning aeromagnetic surveys in Canada, we study the variations in Pc3 index amplitude over Canada in 2000. This study shows distinct patterns associated with the sub-auroral zone, the auroral zone, and the polar cap. Average Pc3 index activity is higher during the months of February, July, September, and November in the auroral and sub-auroral zones. The station in the polar cap exhibits maximum activity near midday during the summer months. Detailed analysis of a magnetic storm shows that Pc3 index amplitude during the beginning of the solar storm is least important at the polar cap. The mean Pc3 index also relates to solar wind parameters such as the solar wind velocity and the vertical polarity of the interplanetary magnetic field. Analysis of the morning maximum of the Pc3 index observed in the auroral zone can be used to develop guidelines for planning aeromagnetic surveys in Canada and other areas of the world affected by auroral zones.
机译:地磁活动会影响航空勘测。地磁变化非常复杂,可以用不同的方式量化。澳大利亚太空气象局开发的Pc3脉动指数是衡量地磁活动的一种指标,可用于计划航空磁测。为了制定加拿大的航空勘测规划指南,我们研究了2000年加拿大Pc3指数幅度的变化。该研究显示了与极光下带,极光带和极地盖有关的不同模式。在极光和极光以下区域,2月,7月,9月和11月的平均Pc3指数活动较高。在夏季,中午时分,极地盖帽的测站显示出最大的活动量。对磁暴的详细分析表明,太阳风暴开始时的Pc3指数幅度在极地极小处最不重要。平均Pc3指数还与太阳风参数有关,例如太阳风速度和行星际磁场的垂直极性。对在极光区中观测到的Pc3指数的早晨最大值进行分析,可用于制定指导计划,以计划在加拿大和受极光区影响的世界其他地区进行航空磁测。

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