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In this paper Pi2 pulsations at Zhongshan Station of Antarctica are analyzed from October 1 - 31, 1996. Their characteristics e. g. occurrence frequency,frequency, and polarization are studied. The characteristics of Pi2 pulsations are summerized as follows: (1 ) Pi2 pulsations at Zhongshan Station usually take place from 2000 MLT to 0200 MLT; the main frequencies are between 6. 79 mHz and 13. 58mHZ; (2 ) Pi2 pulsations with low frequencies are dominent. The range of main frequencies becomes narrow at midnight; (3) The Polarization of Pi2 pulsations are almost linear; (4) About the orientation of major axes the NW-SE direction is dominent before 2200 MLT and NE-SW is dominent after 2200 MLT. The generation mechanism of Pi2 pulsations at Zhongshan Station is discussed theoretically. 相似文献
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该控制网位于延吉市南部松江镇附近的地质勘探区内,此处山高林密用传统方法进行控制测量比较困难。本文主要是论述了在此等条件下,我们应用GPS静态测量方法布设控制网、进行野外采集数据、应用平差软件平差解算、介绍了解算过程中各边、环及点位的精度情况。实践证明这项技术比传统光电测控制网有诸多优势。 相似文献
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